{"trustable":false,"prependHtml":"\u003cstyle type\u003d\u0027text/css\u0027\u003e\n .input, .output {\n border: 1px solid #888888;\n }\n .output {\n margin-bottom: 1em;\n position: relative;\n top: -1px;\n }\n .output pre, .input pre {\n background-color: #EFEFEF;\n line-height: 1.25em;\n margin: 0;\n padding: 0.25em;\n }\n \u003c/style\u003e\n \u003clink rel\u003d\"stylesheet\" href\u003d\"//codeforces.org/s/96598/css/problem-statement.css\" type\u003d\"text/css\" /\u003e\u003cscript\u003e window.katexOptions \u003d { disable: true }; \u003c/script\u003e\n\u003cscript type\u003d\"text/x-mathjax-config\"\u003e\n MathJax.Hub.Config({\n tex2jax: {\n inlineMath: [[\u0027$$$\u0027,\u0027$$$\u0027], [\u0027$\u0027,\u0027$\u0027]],\n displayMath: [[\u0027$$$$$$\u0027,\u0027$$$$$$\u0027], [\u0027$$\u0027,\u0027$$\u0027]]\n }\n });\n\u003c/script\u003e\n\u003cscript type\u003d\"text/javascript\" async src\u003d\"https://mathjax.codeforces.org/MathJax.js?config\u003dTeX-AMS_HTML-full\"\u003e\u003c/script\u003e","sections":[{"title":"","value":{"format":"HTML","content":"\u003cp\u003ewengyan17对长度为𝑛的二进制字符串𝑞有𝑠查询。二进制字符串是指只包含字符 \"0 \"和 \"1 \"的字符串。\u003cbr\u003e\n\n一个查询由一对整数𝑙𝑖,𝑟𝑖(1≤𝑙𝑖\u003c𝑟𝑖≤𝑛)描述。\u003cbr\u003e\n\n对于每一个查询,他必须确定在𝑠中是否存在一个好的子序列,它等于子串𝑠[𝑙𝑖...𝑟𝑖]。\n\u003cbr\u003e\n字符串𝑠的子串𝑠[𝑖...𝑗]是由字符𝑠𝑖 𝑠𝑖+1 .. 𝑠𝑗组成的字符串。\n如果通过删除一些字符而不改变其余字符的顺序,可以从𝑏中得到𝑎,则称其为字符串𝑏的子序列。\u003cbr\u003e\n如果一个子序列不是连续的,并且长度≥2,则称其为好的。例如,如果𝑠是 \"1100110\",那么子序列𝑠1𝑠2𝑠4(\"1100110\")和𝑠1𝑠5𝑠7(\"1100110\")是好的,而𝑠1𝑠2𝑠3(\"1100110\")是不好的。\n你能帮助wengyan17回答每个疑问吗?\u003c/p\u003e"}},{"title":"Input","value":{"format":"HTML","content":"输入\u003cbr\u003e\n输入的第一行包含一个整数𝑡(1≤𝑡≤100)--测试用例的数量。每个测试用例的描述如下。\n\u003cbr\u003e\n第一行包含两个整数𝑛(2≤𝑛≤100)和𝑞(1≤𝑞≤100)--字符串的长度和查询次数。\n\u003cbr\u003e\n第二行包含字符串𝑠。\n\u003cbr\u003e\n接下来的第𝑖行包含两个整数𝑙𝑖和𝑟𝑖(1≤𝑙𝑖\u003c𝑟𝑖≤𝑛)。"}},{"title":"Output","value":{"format":"HTML","content":"Output\u003cbr\u003e\nFor each test case, output 𝑞 lines. The 𝑖-th line of the output of each test case should contain “YES” if there exists a good subsequence equal to the substring 𝑠[𝑙𝑖…𝑟𝑖], and “NO” otherwise."}},{"title":"Sample 1","value":{"format":"HTML","content":"\u003ctable class\u003d\u0027vjudge_sample\u0027\u003e\n\u003cthead\u003e\n \u003ctr\u003e\n \u003cth\u003eInput\u003c/th\u003e\n \u003cth\u003eOutput\u003c/th\u003e\n \u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n \u003ctr\u003e\n \u003ctd\u003e\u003cpre\u003e2\n6 3\n001000\n2 4\n1 3\n3 5\n4 2\n1111\n1 4\n2 3\n\u003c/pre\u003e\u003c/td\u003e\n \u003ctd\u003e\u003cpre\u003eYES\nNO\nYES\nNO\nYES\n\u003c/pre\u003e\u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\n"}},{"title":"Note","value":{"format":"HTML","content":"\u003cp\u003eIn the first test case, \u003c/p\u003e\n\u003cul\u003e \n \u003cli\u003e $$$s[2\\ldots 4] \u003d $$$ \"\u003cspan class\u003d\"tex-font-style-tt\"\u003e010\u003c/span\u003e\". In this case $$$s_1s_3s_5$$$ (\"\u003cspan class\u003d\"tex-font-style-tt\"\u003e\u003cspan class\u003d\"tex-font-style-bf\"\u003e0\u003c/span\u003e0\u003cspan class\u003d\"tex-font-style-bf\"\u003e1\u003c/span\u003e0\u003cspan class\u003d\"tex-font-style-bf\"\u003e0\u003c/span\u003e0\u003c/span\u003e\") and $$$s_2s_3s_6$$$ (\"\u003cspan class\u003d\"tex-font-style-tt\"\u003e0\u003cspan class\u003d\"tex-font-style-bf\"\u003e0\u003c/span\u003e\u003cspan class\u003d\"tex-font-style-bf\"\u003e1\u003c/span\u003e00\u003cspan class\u003d\"tex-font-style-bf\"\u003e0\u003c/span\u003e\u003c/span\u003e\") are good suitable subsequences, while $$$s_2s_3s_4$$$ (\"\u003cspan class\u003d\"tex-font-style-tt\"\u003e0\u003cspan class\u003d\"tex-font-style-bf\"\u003e0\u003c/span\u003e\u003cspan class\u003d\"tex-font-style-bf\"\u003e1\u003c/span\u003e\u003cspan class\u003d\"tex-font-style-bf\"\u003e0\u003c/span\u003e00\u003c/span\u003e\") is not good. \u003c/li\u003e\n \u003cli\u003e $$$s[1\\ldots 3] \u003d $$$ \"\u003cspan class\u003d\"tex-font-style-tt\"\u003e001\u003c/span\u003e\". No suitable good subsequence exists. \u003c/li\u003e\n \u003cli\u003e $$$s[3\\ldots 5] \u003d $$$ \"\u003cspan class\u003d\"tex-font-style-tt\"\u003e100\u003c/span\u003e\". Here $$$s_3s_5s_6$$$ (\"\u003cspan class\u003d\"tex-font-style-tt\"\u003e00\u003cspan class\u003d\"tex-font-style-bf\"\u003e1\u003c/span\u003e0\u003cspan class\u003d\"tex-font-style-bf\"\u003e00\u003c/span\u003e\u003c/span\u003e\") is a suitable good subsequence. \u003c/li\u003e\n\u003c/ul\u003e"}}]}