{"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$$\u0027]]\n }\n });\n\u003c/script\u003e\n\u003cscript type\u003d\"text/javascript\" async src\u003d\"https://mathjax.codeforces.org/MathJax.js?config\u003dTeX-AMS_HTML-full\"\u003e\u003c/script\u003e","sections":[{"title":"","value":{"format":"HTML","content":"\u003cstyle type\u003d\u0027text/css\u0027\u003e .input, .output {border: 1px solid #888888;} .output {margin-bottom:1em;position:relative;top:-1px;} .output pre,.input pre {background-color:#EFEFEF;line-height:1.25em;margin:0;padding:0.25em;} .title {background-color:#FFFFFF;border-bottom: 1px solid #888888;font-family:arial;font-weight:bold;padding:0.25em;} \u003c/style\u003e \u003cscript type\u003d\"text/x-mathjax-config\"\u003e\n MathJax.Hub.Config({\n tex2jax: {inlineMath: [[\u0027$$$\u0027,\u0027$$$\u0027]], displayMath: [[\u0027$$$$$$\u0027,\u0027$$$$$$\u0027]]}\n });\n \u003c/script\u003e\n \u003cscript type\u003d\"text/javascript\" async\n src\u003d\"https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config\u003dTeX-AMS-MML_HTMLorMML\"\u003e\n \u003c/script\u003e\n\u003cp\u003e给你一个长度为 n 的二进制字符串。(该字符串中只有 0 和 1 )。\u003c/p\u003e\n\u003cp\u003e在一次移动中,你可以交换字符串的两个相邻字符。你最多可执行 k 次操作。输出你所得到的字典序最小的字符串\u003c/p\u003e\n\u003cp\u003e现在你需要回答 q 个问题。\u003c/p\u003e"}},{"title":"Input","value":{"format":"HTML","content":"\u003cp\u003e第一行输入一个整数 q (1 \u003c\u003d q \u003c\u003d 10000) — 代表q个问题.\u003c/p\u003e\n\u003cp\u003e每组测试第一行为两个整数 n 和 k (1 \u003c\u003d n \u003c\u003d 10^6, 1 \u003c\u003d k \u003c\u003d n^2) 。分别代表字符串的长度和可操作的次数\u003c/p\u003e\n\u003cp\u003e第二行是一个长度为 n 的字符串,如题目描述只有 0 和 1 。\u003c/p\u003e\n\u003cp\u003e所有测试中,n 的总和 \u003c\u003d 10^6\u003c/p\u003e"}},{"title":"Output","value":{"format":"HTML","content":"\u003cp\u003e输出题目所要的字符串。\u003c/p\u003e"}},{"title":"Example","value":{"format":"HTML","content":"\u003cdiv class\u003d\"sample-test\"\u003e\n \u003cdiv class\u003d\"input\"\u003e\n \u003cdiv class\u003d\"title\"\u003e\n Input\n \u003c/div\u003e\n \u003cpre\u003e3\n8 5\n11011010\n7 9\n1111100\n7 11\n1111100\n\u003c/pre\u003e\n \u003c/div\u003e\n \u003cdiv class\u003d\"output\"\u003e\n \u003cdiv class\u003d\"title\"\u003e\n Output\n \u003c/div\u003e\n \u003cpre\u003e01011110\n0101111\n0011111\n\u003c/pre\u003e\n \u003c/div\u003e\n\u003c/div\u003e"}},{"title":"Note","value":{"format":"HTML","content":"\u003cp\u003e第一个样例: 1\u003cu\u003e10\u003c/u\u003e11010 -\u003e \u003cu\u003e10\u003c/u\u003e111010 -\u003e 0111\u003cu\u003e10\u003c/u\u003e10 -\u003e 0111\u003cu\u003e10\u003c/u\u003e10-\u003e01\u003cu\u003e10\u003c/u\u003e1110 -\u003e 01011110 \u003c/p\u003e\n"}}]}