{"id":2340,"date":"2018-02-03T20:24:54","date_gmt":"2018-02-03T16:54:54","guid":{"rendered":"https:\/\/blog.quera.ir\/?p=2260"},"modified":"2018-02-03T20:24:54","modified_gmt":"2018-02-03T16:54:54","slug":"%d8%b1%d8%a7%d9%87%e2%80%8c%d8%ad%d9%84%e2%80%8c%d9%87%d8%a7%db%8c-%d9%85%d8%b3%d8%a7%d8%a8%d9%82%d9%87%e2%80%8c%db%8c-%db%b2%db%b2","status":"publish","type":"post","link":"https:\/\/quera.org\/blog\/%d8%b1%d8%a7%d9%87%e2%80%8c%d8%ad%d9%84%e2%80%8c%d9%87%d8%a7%db%8c-%d9%85%d8%b3%d8%a7%d8%a8%d9%82%d9%87%e2%80%8c%db%8c-%db%b2%db%b2\/","title":{"rendered":"\u0631\u0627\u0647\u200c\u062d\u0644\u200c\u0647\u0627\u06cc \u0645\u0633\u0627\u0628\u0642\u0647\u200c\u06cc \u06f2\u06f2"},"content":{"rendered":"<p>\u0633\u0644\u0627\u0645!<\/p>\n<p>\u0631\u0627\u0647\u200c\u062d\u0644\u200c\u200c\u0647\u0627\u06cc \u0645\u0633\u0627\u0628\u0642\u0647\u200c\u06cc \u0634\u0645\u0627\u0631\u0647\u200c \u06f2\u06f2 \u0631\u0627 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u06cc\u062f \u062f\u0631 \u0627\u062f\u0627\u0645\u0647\u200c\u06cc \u0645\u0637\u0644\u0628 \u0628\u0628\u06cc\u0646\u06cc\u062f.<\/p>\n<p><!--more--><\/p>\n<p>\u0645\u06cc\u200c\u062e\u0648\u0627\u0647\u0645 \u0627\u0632 \u0622\u0631\u0645\u06cc\u0646 \u0641\u0644\u0627\u062d \u0628\u0631\u0627\u06cc \u06a9\u0645\u06a9 \u062f\u0631 \u0646\u0647\u0627\u06cc\u06cc\u200c\u0633\u0627\u0632\u06cc \u0645\u0633\u0627\u0628\u0642\u0647 \u0646\u06cc\u0632 \u062a\u0634\u06a9\u0631 \u06a9\u0646\u0645.<\/p>\n<p>\u0627\u06cc\u0646 \u0647\u0645 \u0631\u0627\u0647\u200c\u062d\u0644 \u0633\u0648\u0627\u0644\u0627\u062a \u0645\u0633\u0627\u0628\u0642\u0647:<\/p>\n<ul>\n<li>\n<h3><a href=\"https:\/\/quera.ir\/problemset\/contest\/14580\/%D8%B3%D8%A4%D8%A7%D9%84%D8%A7%D8%AA-%D9%85%D8%B3%D8%A7%D8%A8%D9%82%D9%87_%D8%A8%D8%A7%D8%A8-%D9%88-%DA%A9%D9%84%DB%8C%D8%AF-%D8%AA%D9%84%D9%88%DB%8C%D8%B2%DB%8C%D9%88%D9%86\">\u0628\u0627\u0628 \u0648 \u06a9\u0644\u06cc\u062f \u062a\u0644\u0648\u06cc\u0632\u06cc\u0648\u0646<\/a><\/h3>\n<\/li>\n<\/ul>\n<p>\u0645\u06cc\u200c\u062a\u0648\u0627\u0646 \u062f\u0631 \u0627\u06cc\u0646 \u0645\u0633\u0627\u0644\u0647 \u0647\u0645\u0627\u0646\u00a0\u200c\u06a9\u0627\u0631\u06cc \u06a9\u0647 \u0635\u0648\u0631\u062a \u0645\u06cc\u200c\u062e\u0648\u0627\u0647\u062f \u0631\u0627 \u0627\u0646\u062c\u0627\u0645 \u062f\u0647\u06cc\u0645.<\/p>\n<p>\u06a9\u062f\u00a0<a href=\"https:\/\/paste.ubuntu.com\/26508858\/\"><span class=\"katex-eq\" data-katex-display=\"false\"> C++ <\/span> <\/a><\/p>\n<ul>\n<li>\n<h3><a href=\"https:\/\/quera.ir\/problemset\/contest\/14581\/%D8%B3%D8%A4%D8%A7%D9%84%D8%A7%D8%AA-%D9%85%D8%B3%D8%A7%D8%A8%D9%82%D9%87_%DA%A9%D9%88%DB%8C%D9%86-%D9%88-%D9%82%D8%AF%D8%B1%D8%AA-%D8%B4%D8%A7%D9%84%D8%A7%D9%BE\">\u06a9\u0650\u0648\u06cc\u0646 \u0648 \u0642\u062f\u0631\u062a \u0634\u0627\u0644\u0627\u067e<\/a><\/h3>\n<\/li>\n<\/ul>\n<p>\u0645\u06cc\u200c\u062a\u0648\u0627\u0646 \u062f\u0648 \u062d\u0627\u0644\u062a \u0632\u0648\u062c \u0648 \u0641\u062f\u0631 \u0628\u0648\u062f\u0646 \u0631\u0627 \u062c\u062f\u0627\u200c\u06af\u0627\u0646\u0647 \u0628\u062f\u0633\u062a \u0622\u0648\u0631\u062f \u06a9\u0647 \u0627\u06af\u0631 \u0641\u0631\u062f \u0628\u0648\u062f \u062c\u0648\u0627\u0628 \u0628\u0631\u0627\u0628\u0631\u00a0<span class=\"katex-eq\" data-katex-display=\"false\"> \\frac{n-1}{4} <\/span>\u00a0 \u0645\u06cc\u200c\u0634\u0648\u062f \u0648 \u0628\u0631\u0627\u06cc \u0632\u0648\u062c \u062c\u0648\u0627\u0628 \u0628\u0631\u0627\u0628\u0631\u00a0<span class=\"katex-eq\" data-katex-display=\"false\"> \\frac{n^2}{(n+1) \\times 4} <\/span> \u0645\u06cc\u200c\u0634\u0648\u062f.<\/p>\n<p>\u06a9\u062f<a href=\"https:\/\/paste.ubuntu.com\/26508852\/\">\u00a0<span class=\"katex-eq\" data-katex-display=\"false\"> C++ <\/span><\/a><\/p>\n<ul>\n<li>\n<h3><a href=\"https:\/\/quera.ir\/problemset\/contest\/14582\/%D8%B3%D8%A4%D8%A7%D9%84%D8%A7%D8%AA-%D9%85%D8%B3%D8%A7%D8%A8%D9%82%D9%87_%D8%A8%D8%A7%D8%A8-%D8%AF%D8%B1-%D8%AD%D8%A7%D9%84-%D8%AE%D8%B1%DB%8C%D8%AF\">\u0628\u0627\u0628 \u062f\u0631 \u062d\u0627\u0644 \u062e\u0631\u06cc\u062f<\/a><\/h3>\n<\/li>\n<\/ul>\n<p>\u0628\u0627\u0628\u062a \u0645\u0634\u06a9\u0644\u0627\u062a \u0628\u0648\u062c\u0648\u062f \u0622\u0645\u062f\u0647 \u062f\u0631 \u0627\u06cc\u0646 \u0633\u0648\u0627\u0644 \u0639\u0630\u0631\u062e\u0648\u0627\u0647\u06cc \u0645\u06cc\u200c\u06a9\u0646\u06cc\u0645.<\/p>\n<p>\u0645\u06cc\u200c\u062a\u0648\u0627\u0646 \u0647\u0645\u0627\u0646 \u06a9\u0627\u0631\u06cc \u06a9\u0647 \u0635\u0648\u0631\u062a \u0633\u0648\u0627\u0644 \u062e\u0648\u0627\u0633\u062a\u0647\u200c \u0631\u0627 \u0627\u0646\u062c\u0627\u0645 \u062f\u0627\u062f. \u0639\u0644\u0627\u0648\u0647 \u0628\u0631 \u0627\u06cc\u0646\u200c\u060c \u0633\u0648\u0627\u0644 \u0631\u0627\u0647\u200c\u062d\u0644\u06cc \u0628\u0627 \u067e\u06cc\u0686\u06cc\u062f\u06af\u06cc \u0632\u0645\u0627\u0646\u06cc\u00a0 <span class=\"katex-eq\" data-katex-display=\"false\"> O(n\\ k^2 \\ log n + m \\ log n) <\/span> \u0646\u06cc\u0632 \u0648\u062c\u0648\u062f \u062f\u0627\u0631\u062f.<\/p>\n<p>\u06a9\u062f<a href=\"https:\/\/paste.ubuntu.com\/26508924\/\">\u00a0<span class=\"katex-eq\" data-katex-display=\"false\"> C++ <\/span><\/a><\/p>\n<p>\u06a9\u062f<a href=\"https:\/\/paste.ubuntu.com\/26513420\/\">\u00a0<span class=\"katex-eq\" data-katex-display=\"false\"> C++ <\/span><\/a>\u00a0\u0628\u0627 \u067e\u06cc\u0686\u06cc\u062f\u06af\u06cc \u0632\u0645\u0627\u0646\u06cc <span class=\"katex-eq\" data-katex-display=\"false\">O(n\\ k^2 \\ log n + m \\ log n) <\/span><\/p>\n<ul>\n<li>\n<h3><a href=\"https:\/\/quera.ir\/problemset\/contest\/14583\/%D8%B3%D8%A4%D8%A7%D9%84%D8%A7%D8%AA-%D9%85%D8%B3%D8%A7%D8%A8%D9%82%D9%87_%DA%A9%D9%88%DB%8C%D9%86-%D9%88-%D8%A7%D8%B9%D8%AF%D8%A7%D8%AF-%D8%A8%D8%A7%DB%8C%D9%86%D8%B1%DB%8C\">\u06a9\u0650\u0648\u06cc\u0646 \u0648 \u0627\u0639\u062f\u0627\u062f \u0628\u0627\u06cc\u0646\u0631\u06cc<\/a><\/h3>\n<\/li>\n<\/ul>\n<p>\u067e\u0633 \u0627\u0632 \u0645\u0642\u062f\u0627\u0631\u06cc \u0628\u0631\u0633\u0633\u06cc \u0645\u06cc\u200c\u062a\u0648\u0627\u0646 \u0628\u0647 \u0627\u06cc\u0646 \u0646\u062a\u06cc\u062c\u0647 \u0631\u0633\u06cc\u062f \u06a9\u0647 \u0633\u0648\u0627\u0644 \u062a\u0639\u062f\u0627\u062f \u0632\u06cc\u0631 \u0631\u0634\u062a\u0647\u200c\u0647\u0627\u06cc \u06f1\u06f1\u06f0\u06f0 \u0648 \u06f1\u06f1\u06f1\u06f0 \u0631\u0627 \u0628\u0627\u06cc\u062f \u0628\u0634\u0645\u0627\u0631\u06cc\u0645\u060c \u06a9\u0647 \u0627\u06cc\u0646 \u06a9\u0627\u0631 \u0631\u0627 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646 \u0628\u0627 \u0646\u06af\u0647 \u062f\u0627\u0634\u062a\u0646 \u062a\u0639\u062f\u0627\u062f \u06f1\u06f1\u06f0 \u0647\u0627 \u0648 \u06f1 \u0647\u0627 \u0628\u062f\u0633\u062a \u0622\u0648\u0631\u062f. \u0628\u0631\u0627\u06cc \u062f\u0631\u06a9 \u0628\u0647\u062a\u0631 \u0631\u0627\u0647\u200c\u062d\u0644 \u06a9\u062f \u0632\u06cc\u0631 \u0631\u0627 \u0645\u0637\u0627\u0644\u0639\u0647 \u06a9\u0646\u06cc\u062f.<\/p>\n<p>\u06a9\u062f<a href=\"https:\/\/paste.ubuntu.com\/26508941\/\">\u00a0<span class=\"katex-eq\" data-katex-display=\"false\"> C++ <\/span><\/a><\/p>\n<ul>\n<li>\n<h3><a href=\"https:\/\/quera.ir\/problemset\/contest\/14584\/%D8%B3%D8%A4%D8%A7%D9%84%D8%A7%D8%AA-%D9%85%D8%B3%D8%A7%D8%A8%D9%82%D9%87_%D8%A8%D8%A7%D8%A8-%D9%88-%D8%AA%D8%A8%D8%AF%DB%8C%D9%84-%D8%AF%D9%86%D8%A8%D8%A7%D9%84%D9%87\">\u0628\u0627\u0628 \u0648 \u062a\u0628\u062f\u06cc\u0644 \u062f\u0646\u0628\u0627\u0644\u0647\u200c<\/a><\/h3>\n<\/li>\n<\/ul>\n<p>\u0645\u06cc\u200c\u062a\u0648\u0627\u0646 \u0628\u0647 \u0627\u06cc\u0646 \u0646\u062a\u06cc\u062c\u0647 \u0631\u0633\u06cc\u062f \u06a9\u0647 \u062d\u062a\u0645\u0627 \u0639\u0636\u0648\u06cc \u0627\u0632 \u062f\u0646\u0628\u0627\u0644\u0647 \u0648\u062c\u0648\u062f \u062f\u0627\u0631\u062f \u06a9\u0647 \u062a\u063a\u06cc\u06cc\u0631 \u0646\u0645\u06cc\u200c\u06a9\u0646\u062f. \u0648 \u0645\u0627 \u0628\u0627 \u062a\u0628\u062f\u06cc\u0644 \u0645\u0633\u0627\u0644\u0647 \u0628\u0647 \u0645\u0633\u0627\u0644\u0647\u200c\u0627\u06cc \u06a9\u0647 \u0645\u06cc\u200c\u062e\u0648\u0627\u0647\u06cc\u0645 \u062a\u0645\u0627\u0645 \u0627\u0639\u062f\u0627\u062f \u062f\u0646\u0628\u0627\u0644\u0647 \u0631\u0627 \u0628\u0631\u0627\u0628\u0631 \u06a9\u0646\u06cc\u0645 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u06cc\u0645 \u0627\u06cc\u0646 \u0645\u0633\u0627\u200c\u0644\u0647 \u0631\u0627 \u0628\u0647 \u0631\u0627\u062d\u062a\u06cc \u0628\u0627 \u0645\u0634\u062e\u0635 \u06a9\u0631\u062f\u0646 \u0639\u062f\u062f\u06cc \u06a9\u0647 \u0645\u06cc\u200c\u062e\u0648\u0627\u0647\u06cc\u0645 \u062a\u0645\u0627\u0645 \u0627\u0639\u062f\u0627\u062f \u0631\u0627 \u0628\u0631\u0627\u0628\u0631 \u0622\u0646 \u06a9\u0646\u06cc\u0645 \u062d\u0644 \u06a9\u0646\u06cc\u0645. \u0628\u0631\u0627\u06cc \u062f\u0631\u06a9 \u0628\u0647\u062a\u0631 \u0631\u0627\u0647\u200c\u062d\u0644 \u06a9\u062f \u0632\u06cc\u0631 \u0631\u0627 \u0645\u0637\u0627\u0644\u0639\u0647 \u06a9\u0646\u06cc\u062f. \u0639\u0644\u0627\u0648\u0647 \u0628\u0631 \u0627\u06cc\u0646 \u06cc\u06a9 \u0631\u0627\u0647\u200c\u062d\u0644 \u0628\u0627 \u062c\u0633\u062a\u062c\u0648\u06cc \u062a\u0631\u0646\u0631\u06cc \u0646\u06cc\u0632 \u0648\u062c\u0648\u062f \u062f\u0627\u0631\u062f.<\/p>\n<p>\u06a9\u062f<a href=\"https:\/\/paste.ubuntu.com\/26508955\/\">\u00a0<span class=\"katex-eq\" data-katex-display=\"false\"> C++ <\/span><\/a><\/p>\n<p>\u06a9\u062f<a href=\"https:\/\/paste.ubuntu.com\/26519147\/\">\u00a0<span class=\"katex-eq\" data-katex-display=\"false\"> C++ <\/span><\/a>\u00a0\u0628\u0627 \u062c\u0633\u062a\u062c\u0648\u06cc \u062a\u0631\u0646\u0631\u06cc<\/p>\n<ul>\n<li>\n<h3><a href=\"https:\/\/quera.ir\/course\/assignments\/4371\/problems\/14575\">\u06a9\u0650\u0648\u06cc\u0646 \u0648 \u062a\u0631\u0628<\/a><\/h3>\n<\/li>\n<\/ul>\n<p>\u0627\u06af\u0631 \u062a\u0639\u062f\u0627\u062f \u062d\u0631\u06a9\u0627\u062a \u06a9\u0645\u062a\u0631 \u0627\u0632 4000 \u0628\u0648\u062f \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u0633\u062a\u06cc\u0645 \u0627\u0632 DFS \u0645\u0639\u0645\u0648\u0644\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u0645 \u06a9\u0647 \u0645\u0648\u0644\u0641\u0647\u200c\u0647\u0627 \u0631\u0627 \u0628\u062f\u0633\u062a \u0628\u06cc\u0627\u0648\u0631\u06cc\u0645\u060c \u0648\u0644\u06cc \u0628\u0627 \u0627\u06cc\u0646 \u062a\u0639\u062f\u0627\u062f \u062d\u0631\u06a9\u0627\u062a \u0645\u06cc\u200c\u062a\u0648\u0627\u0646 \u0628\u0647\u200c\u062c\u0627\u06cc \u0622\u0646 \u06a9\u0647 \u0631\u0627\u0633 \u0647\u0627 \u0631\u0627 \u062e\u0627\u0646\u0647\u200c\u0647\u0627\u06cc \u06af\u0631\u0627\u0641 \u062f\u0631 \u0646\u0638\u0631 \u06af\u0631\u0641\u062a\u060c \u062e\u0627\u0646\u0647\u200c\u0647\u0627\u06cc \u0647\u0631 \u0633\u0637\u0631 (\u06cc\u0627 \u0647\u0645\u0627\u0646 \u0647\u0631 y) \u0631\u0627 \u0628\u0647 \u0628\u0627\u0632\u0647\u200c\u0647\u0627\u200c\u06cc\u06cc \u0627\u0632 \u062e\u0627\u0646\u0647\u200c\u0647\u0627\u06cc \u0633\u0641\u06cc\u062f \u0627\u0641\u0631\u0627\u0632 \u0645\u06cc\u200c\u06a9\u0646\u06cc\u0645. \u0633\u067e\u0633 \u062f\u0631 \u0628\u06cc\u0646 \u062f\u0648 \u0628\u0627\u0632\u0647\u200c\u06cc \u0645\u062a\u0648\u0627\u0644\u06cc \u06cc\u0627\u0644 \u0645\u06cc\u200c\u06af\u0630\u0627\u0631\u06cc\u0645 \u0627\u06af\u0631 \u062d\u062f\u0627\u0642\u0644 \u06cc\u06a9 \u062e\u0627\u0646\u0647\u200c\u0647\u0627\u06cc \u0628\u0627 x \u0628\u0631\u0627\u0628\u0631 \u062f\u0627\u0634\u062a\u0647\u200c\u0628\u0627\u0634\u0646\u062f. \u0627\u06cc\u0646 \u06cc\u0627\u0644 \u0647\u0627\u200c \u0631\u0627 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646 \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u062c\u0633\u062a\u062c\u0648\u06cc\u200c \u062f\u0648\u062f\u0648\u06cc\u06cc \u0642\u0631\u0627\u0631 \u062f\u0647\u06cc\u0645. \u0633\u067e\u0633 \u0631\u0648\u06cc \u06af\u0631\u0627\u0641 \u062d\u0627\u0635\u0644 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u06cc\u0645 \u0627\u0644\u06af\u0648\u0631\u06cc\u062a\u0645 DFS \u0631\u0627 \u0627\u062c\u0631\u0627 \u06a9\u0646\u06cc\u0645. \u062a\u0639\u062f\u0627\u062f \u0631\u0627\u0633\u200c\u0647\u0627\u06cc \u0627\u06cc\u0646 \u06af\u0631\u0627\u0641 \u0627\u0632\u00a0\u00a0<span class=\"katex-eq\" data-katex-display=\"false\"> O(n) <\/span> \u0627\u0633\u062a \u0632\u06cc\u0631\u0627 \u0647\u0631 \u062d\u0631\u06a9\u062a \u06cc\u06a9 \u0628\u0627\u0632\u0647 \u0631\u0627 \u0628\u0647 \u062f\u0648 \u0642\u0633\u0645\u062a \u062a\u0642\u0633\u06cc\u0645 \u0645\u06cc\u200c\u06a9\u0646\u062f. \u0648 \u062a\u0639\u062f\u0627\u062f \u06cc\u0627\u0644 \u0647\u0627 \u0647\u0645 \u0627\u0632\u00a0<span class=\"katex-eq\" data-katex-display=\"false\"> O(n) <\/span> \u0627\u0633\u062a \u0632\u06cc\u0631\u0627 \u0647\u0631 \u0628\u0627\u0632\u0647 \u0628\u0647 \u0627\u0646\u062f\u0627\u0632\u0647\u200c\u06cc \u062d\u062f\u0627\u06a9\u062b\u0631 \u062f\u0648 \u0628\u0631\u0627\u0628\u0631 \u0637\u0648\u0644\u0634 \u06cc\u0627\u0644 \u0628\u0647 \u0628\u0642\u06cc\u0647\u200c\u06cc \u0631\u0627\u0633\u200c\u0647\u0627 \u062f\u0627\u0631\u062f. \u067e\u06cc\u0686\u06cc\u200c\u062f\u06af\u06cc \u0632\u0645\u0627\u0646 \u0631\u0627\u0647\u200c\u062d\u0644 \u0627\u0632 <span class=\"katex-eq\" data-katex-display=\"false\"> O(n \\ log n) <\/span> \u0645\u06cc\u200c\u0634\u0648\u062f. \u0628\u0631\u0627\u06cc \u062f\u0631\u06a9 \u0628\u0647\u062a\u0631 \u0631\u0627\u200c\u0647\u200c\u062d\u0644 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u06cc\u062f \u06a9\u062f \u0632\u06cc\u0631 \u0631\u0627 \u0645\u0637\u0627\u0644\u0639\u0647 \u06a9\u0646\u06cc\u062f.<\/p>\n<ul>\n<li>\n<h3><a href=\"https:\/\/quera.ir\/course\/assignments\/4371\/problems\/14576\">\u0628\u0627\u0628 \u0648 \u0627\u0641\u0631\u0627\u0632 \u062f\u0646\u0628\u0627\u0644\u0647<\/a><\/h3>\n<\/li>\n<\/ul>\n<p>\u0645\u06cc\u200c\u062a\u0648\u0627\u0646 \u0628\u0647 \u0627\u06cc\u0646 \u0646\u062a\u06cc\u062c\u0647 \u0631\u0633\u06cc\u062f \u06a9\u0647\u00a0<em>\u0642\u062f\u0631\u062a\u200c\u0645\u062d\u0636\u00a0<\/em>\u06cc\u06a9 \u062f\u0646\u0628\u0627\u0644\u0647 \u0641\u0642\u0637 \u0628\u0647 \u0645\u062c\u0645\u0648\u0639 \u0627\u0639\u062f\u0627\u062f\u0634 \u0628\u0633\u062a\u06af\u06cc \u062f\u0627\u0631\u062f\u060c \u0642\u062f\u0631\u062a \u0645\u062d\u0636 \u06cc\u06a9 \u062f\u0646\u0628\u0627\u0644\u0647 \u0628\u0631\u0627\u0628\u0631<\/p>\n<p style=\"text-align: center\"><span class=\"katex-eq\" data-katex-display=\"false\"> \\sum_{i=1}^{n} \\binom{n-1}{i-1} \\times B_{n-j} \\times p_i <\/span><\/p>\n<p>\u0636\u0631\u0628 \u062f\u0631 \u0645\u062c\u0645\u0648\u0639 \u0622\u0646 \u0628\u062e\u0634 \u0627\u0632 \u062f\u0646\u0628\u0627\u0644\u0647 \u0645\u06cc\u200c\u0634\u0648\u062f \u06a9\u0647 <span class=\"katex-eq\" data-katex-display=\"false\"> B_i <\/span> \u0639\u062f\u062f i \u0627\u0645 <a href=\"https:\/\/en.wikipedia.org\/wiki\/Bell_number\">\u0628\u0644<\/a> \u0627\u0633\u062a \u06a9\u0647 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646 \u0628\u0627 \u067e\u06cc\u0686\u06cc\u062f\u06af\u06cc \u0632\u0645\u0627\u0646\u06cc <span class=\"katex-eq\" data-katex-display=\"false\">O(n^2)<\/span> \u0628\u062f\u0633\u062a \u0622\u0648\u0631\u062f. \u062d\u0627\u0644 \u0628\u0627 \u0646\u06af\u0647\u200c\u062f\u0627\u0634\u062a\u0646 \u0647\u0631 \u06cc\u06a9 \u0627\u0632 \u0622\u0646 \u0636\u0631\u0627\u06cc\u0628 \u0648 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u06cc\u06a9 \u062f\u0627\u062f\u0647\u200c\u0633\u0627\u062e\u062a\u0627\u0631 \u0628\u0631\u0627\u06cc \u062a\u063a\u06cc\u06cc\u0631 \u0627\u0639\u062f\u0627\u062f \u06cc\u06a9 \u0628\u0627\u0632\u0647 \u0648 \u0628\u062f\u0633\u062a \u0622\u0648\u0631\u062f\u0646 \u0645\u062c\u0645\u0648\u0639 \u0622\u0646 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646 \u0645\u0633\u0627\u200c\u0644\u0647 \u0631\u0627 \u062d\u0644 \u06a9\u0631\u062f.<\/p>\n<p>&nbsp;<\/p>\n<ul>\n<li>\n<h3><a href=\"https:\/\/quera.ir\/course\/assignments\/4371\/problems\/14577\">\u06a9\u0650\u0648\u06cc\u0646 \u0648 \u062f\u0631\u06cc\u0627\u200c\u0646\u0648\u0631\u062f\u06cc<\/a><\/h3>\n<\/li>\n<\/ul>\n<p>\u06cc\u06a9 \u0646\u0627\u062d\u06cc\u0647 \u0627\u0632 \u062c\u062f\u0648\u0644 \u0627\u06cc\u0646\u200c\u06af\u0648\u0646\u0647 \u062a\u0639\u0631\u06cc\u0641 \u0645\u06cc\u200c\u0634\u0648\u062f \u06a9\u0647 \u06cc\u06a9 \u0628\u062e\u0634 \u0647\u0645\u0628\u0646\u062f \u0627\u0632 \u062c\u062f\u0648\u0644 \u0627\u0633\u062a \u06a9\u0647 \u0627\u0637\u0631\u0627\u0641 \u0622\u0646 \u0627\u0632 <code>#<\/code>\u00a0\u062a\u0634\u06a9\u06cc\u0644 \u0634\u062f\u0647\u200c\u0628\u0627\u0634\u062f \u06a9\u0647 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u062f \u0628\u0647 \u0647\u0631 \u0634\u06a9\u0644\u06cc \u0628\u0627\u0634\u062f. \u0628\u0639\u062f \u0627\u0632 \u06af\u0631\u0641\u062a\u0646 \u0648\u0631\u0648\u062f\u06cc \u062f\u0648\u0631 \u062c\u062f\u0648\u0644 \u06cc\u06a9 \u0646\u0648\u0627\u0631 <code>.<\/code>\u00a0\u0648 \u0633\u067e\u0633 \u06cc\u06a9 \u0646\u0648\u0627\u0631 <code>#<\/code>\u00a0\u0648 \u0633\u067e\u0633 \u06cc\u06a9 \u0646\u0648\u0627\u0631 <code>.<\/code>\u00a0\u062f\u0648\u0631 \u062c\u062f\u0648\u0644 \u0642\u0631\u0627\u0631 \u0645\u06cc\u200c\u062f\u0647\u06cc\u0645. \u0635\u0627\u062d\u0628 \u06cc\u06a9 \u0646\u0627\u062d\u06cc\u0647\u060c \u062c\u0632\u06cc\u0631\u0647\u200c\u0627\u06cc \u0627\u0633\u062a \u06a9\u0647 \u062f\u0648\u0631 \u0622\u0646 \u0646\u0627\u062d\u06cc\u0647 \u0627\u0633\u062a. \u062d\u0627\u0644 \u0645\u0627 \u0628\u0631\u0627\u06cc \u0628\u062f\u0633\u062a \u0622\u0648\u0631\u062f\u0646 \u062c\u0648\u0627\u0628 \u0627\u0632 dp \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc\u200c\u06a9\u0646\u06cc\u0645 \u06a9\u0647 \u0628\u0631\u0627\u06cc \u0647\u0631 \u0646\u0627\u062d\u06cc\u0647 \u0627\u0632 \u062c\u062f\u0648\u0644\u060c \u06f3 dp \u062a\u0639\u0631\u06cc\u0641 \u0645\u06cc\u200c\u06a9\u0646\u06cc\u0645:<\/p>\n<ol>\n<li><span class=\"katex-eq\" data-katex-display=\"false\"> dp_{walk} <\/span> : \u062c\u0648\u0627\u0628 \u0628\u0631\u0627\u06cc \u0627\u06cc\u0646 \u0646\u0627\u062d\u06cc\u0647 \u0628\u0647 \u0627\u06cc\u0646 \u0634\u06a9\u0644 \u06a9\u0647 \u06cc\u06a9 \u0645\u0633\u06cc\u0631 \u0628\u0627\u0634\u062f \u06a9\u0647 \u0627\u0632 \u0635\u0627\u062d\u0628 \u0627\u06cc\u0646 \u0646\u0627\u062d\u06cc\u0647 \u0634\u0631\u0648\u0639 \u0634\u0648\u062f \u0648 \u0628\u0647 \u062e\u0648\u062f\u0634 \u067e\u0627\u06cc\u0627\u0646 \u06cc\u0627\u0628\u062f.<\/li>\n<li><span class=\"katex-eq\" data-katex-display=\"false\">dp_{open}<\/span> : \u062c\u0648\u0627\u0628 \u0628\u0631\u0627\u06cc \u0627\u06cc\u0646 \u0646\u0627\u062d\u06cc\u0647 \u0628\u0647 \u0627\u06cc\u0646 \u0634\u06a9\u0644 \u06a9\u0647 \u06cc\u06a9 \u0645\u0633\u06cc\u0631 \u0628\u0627\u0634\u062f \u06a9\u0647 \u0627\u0632 \u0635\u0627\u062d\u0628 \u0627\u06cc\u0646 \u0646\u0627\u062d\u06cc\u0647 \u0634\u0631\u0648\u0639 \u0634\u0648\u062f.<\/li>\n<li><span class=\"katex-eq\" data-katex-display=\"false\">dp_{close}<\/span> : \u06a9\u0645\u062a\u0631\u06cc\u0646 \u062a\u0639\u062f\u0627\u062f \u0645\u0633\u06cc\u0631 \u0645\u0648\u0631\u062f \u0646\u06cc\u0627\u0632 \u0628\u0631\u0627\u06cc \u062f\u06cc\u062f\u0646 \u06a9\u0644 \u0627\u06cc\u0646 \u0646\u0627\u062d\u06cc\u0647.<\/li>\n<\/ol>\n<p>\u062d\u0627\u0644 \u0635\u0627\u062d\u0628 \u0627\u06cc\u0646 \u0646\u0627\u062d\u06cc\u0647 \u0646\u0642\u0627\u0637 \u0627\u06cc\u0646 \u0646\u0627\u062d\u06cc\u0647 \u0631\u0627 \u0628\u0647 \u0686\u0646\u062f \u0628\u062e\u0634 \u062a\u0642\u0633\u06cc\u0645 \u0645\u06cc\u200c\u06a9\u0646\u062f. \u0628\u0631\u0627\u06cc \u0647\u0631 \u06a9\u062f\u0627\u0645 \u0627\u0632 \u0622\u0646 \u0628\u062e\u0634 \u0647\u0627\u06cc dp \u0631\u0627 \u0628\u062f\u0633\u062a \u0645\u06cc\u200c\u0622\u0648\u0631\u06cc\u0645. \u0633\u067e\u0633 \u0628\u0631\u0627\u06cc \u0628\u062f\u0633\u062a \u0622\u0648\u0631\u062f\u0646 dp \u0647\u0631 \u06a9\u062f\u0627\u0645 \u0627\u0632 \u0628\u062e\u0634 \u0647\u0627\u06cc \u0627\u0641\u0631\u0627\u0636 \u0634\u062f\u0647 \u0634\u062f\u0647\u060c \u0627\u0632 dp \u0647\u0631 \u06a9\u062f\u0627\u0645 \u0627\u0632 \u0646\u0627\u062d\u06cc\u0647\u200c\u0647\u0627\u06cc \u0622\u0646 \u062c\u0648\u0627\u0628 \u0631\u0627 \u0628\u062f\u0633\u062a \u0645\u06cc\u200c\u0622\u0648\u0631\u06cc\u0645 \u06a9\u0647 \u0628\u0647 \u0627\u06cc\u0646 \u0634\u06a9\u0644 \u0627\u0646\u062f:<\/p>\n<p style=\"text-align: left\"><span class=\"katex-eq\" data-katex-display=\"false\">cnt_{walk} = number \\ of \\ (dp_{walk}=dp_{close})<\/span><\/p>\n<p style=\"text-align: left\"><span class=\"katex-eq\" data-katex-display=\"false\">cnt_{open} = number \\ of \\ (dp_{open}=dp_{close})<\/span><\/p>\n<p style=\"text-align: left\"><span class=\"katex-eq\" data-katex-display=\"false\">cnt_{sum} = sum \\ of \\ all \\ dp_{close}<\/span><\/p>\n<p style=\"text-align: left\"><span class=\"katex-eq\" data-katex-display=\"false\">dp_{walk} = cnt_{sum} - \\frac{cnt_{open}}{2} - max(0,cnt_{walk} - max(0,1-cnt_{open}))<\/span><\/p>\n<p style=\"text-align: left\"><span class=\"katex-eq\" data-katex-display=\"false\">dp_{open} = cnt_{sum} - \\frac{cnt_{open}+1}{2} - max(0,cnt_{walk})+1<\/span><\/p>\n<p style=\"text-align: left\"><span class=\"katex-eq\" data-katex-display=\"false\">dp_{close} = dp_{walk}<\/span><\/p>\n<p>\u0627\u0644\u0628\u062a\u0647\u00a0<span class=\"katex-eq\" data-katex-display=\"false\">dp_{close}<\/span> \u0631\u0627 \u0628\u0627\u06cc\u062f \u062f\u0631 \u0635\u0648\u0631\u062a\u06cc \u06a9\u0647\u00a0<span class=\"katex-eq\" data-katex-display=\"false\">cnt_{open} = cnt_{walk}<\/span> \u0628\u0627\u0634\u062f \u06cc\u06a9 \u0648\u0627\u062d\u062f \u0627\u0641\u0632\u0627\u06cc\u0634 \u062f\u0647\u06cc\u0645.<\/p>\n<p>\u062d\u0627\u0644 \u0628\u0631\u0627\u06cc \u0628\u062f\u0633\u062a \u0622\u0648\u0631\u062f\u0646 dp \u0627\u06cc\u0646 \u0646\u0627\u062d\u06cc\u0647 \u0628\u0627\u06cc\u062f \u0631\u0648\u06cc \u0645\u0633\u06cc\u0631\u06cc \u06a9\u0647 \u0627\u0632 \u0635\u0627\u062d\u0628 \u0627\u06cc\u0646 \u0646\u0627\u062d\u06cc\u0647 \u0639\u0628\u0648\u0631 \u0645\u06cc\u200c\u06a9\u0646\u062f \u062d\u0627\u0644\u062a\u200c\u0628\u0646\u062f\u06cc \u06a9\u0646\u06cc\u0645 (\u0628\u0631\u0627\u06cc <span class=\"katex-eq\" data-katex-display=\"false\"> dp_{walk} <\/span> \u0627\u06cc\u0646 \u0628\u062f\u06cc\u0647\u06cc\u200c\u0633\u062a\u060c \u0628\u0631\u0627\u06cc <span class=\"katex-eq\" data-katex-display=\"false\">dp_{open}<\/span> \u0648\u00a0<span class=\"katex-eq\" data-katex-display=\"false\"> dp_{close}<\/span>\u00a0 \u0646\u06cc\u0632 \u0628\u0647 \u0633\u0627\u062f\u06af\u06cc \u0628\u0627 \u062d\u0627\u0644\u062a\u200c\u0628\u0646\u062f\u06cc \u062c\u0648\u0627\u0628 \u0628\u0647 \u062f\u0633\u062a \u0645\u06cc\u200c\u0622\u06cc\u062f) \u0648 \u0633\u067e\u0633 \u062d\u062f\u0627\u0642\u0644 \u062c\u0648\u0627\u0628 \u0645\u0645\u06a9\u0646 \u0631\u0627 \u0628\u0631\u0627\u06cc \u0627\u06cc\u0646 \u0646\u0627\u062d\u06cc\u0647 \u062f\u0631 \u0646\u0638\u0631 \u0645\u06cc\u200c\u06af\u06cc\u0631\u06cc\u0645.<\/p>\n<p>\u062d\u0627\u0644 \u062c\u0648\u0627\u0628 \u0645\u0633\u0627\u0644\u0647 \u0628\u0631\u0627\u0628\u0631 <span class=\"katex-eq\" data-katex-display=\"false\">dp_{walk} -1<\/span> \u0628\u0631\u0627\u06cc \u0646\u0627\u062d\u06cc\u0647\u200c\u06cc \u0628\u06cc\u0631\u0648\u0646\u06cc \u0645\u06cc\u200c\u0634\u0648\u062f.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0633\u0644\u0627\u0645! \u0631\u0627\u0647\u200c\u062d\u0644\u200c\u200c\u0647\u0627\u06cc \u0645\u0633\u0627\u0628\u0642\u0647\u200c\u06cc \u0634\u0645\u0627\u0631\u0647\u200c \u06f2\u06f2 \u0631\u0627 \u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u06cc\u062f \u062f\u0631 \u0627\u062f\u0627\u0645\u0647\u200c\u06cc \u0645\u0637\u0644\u0628 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