{"trustable":false,"prependHtml":"\u003cstyle type\u003d\"text/css\"\u003e\n section pre {\n display: block;\n padding: 9.5px;\n margin: 0 0 10px;\n font-size: 13px;\n line-height: 1.42857143;\n word-break: break-all;\n word-wrap: break-word;\n color: #333;\n background: rgba(255, 255, 255, 0.5);\n border: 1px solid #ccc;\n border-radius: 6px;\n }\n\u003c/style\u003e\n\u003cscript\u003e\n window.katexOptions \u003d {\n delimiters: [\n {left: \u0027\\\\(\u0027, right: \u0027\\\\)\u0027, display: false},\n {left: \u0027\\\\[\u0027, right: \u0027\\\\]\u0027, display: true}\n ]\n };\n\u003c/script\u003e\n","sections":[{"title":"Problem Statement","value":{"format":"MD","content":"已知两个不大于n的正整数a和b,且a%b\u003e\u003dk,求这样的a和b有多少种可能"}},{"title":"Constraints","value":{"format":"MD","content":"n \u003c\u003d 1e5\nk \u003c n"}},{"title":"Input","value":{"format":"MD","content":"\u003ch3\u003e\u003c/h3\u003e\n\u003cp\u003eInput is given from Standard Input in the following format:\u003c/p\u003e \n\u003cpre\u003e\nn k\n\u003c/pre\u003e"}},{"title":"Output","value":{"format":"MD","content":"\u003ch3\u003e\u003c/h3\u003e\n\u003cp\u003ePrint the number of possible pairs that he may have had.\u003c/p\u003e"}},{"title":"Sample Input 1","value":{"format":"MD","content":"\u003ch3\u003e\u003c/h3\u003e\n\u003cpre\u003e5 2\n\u003c/pre\u003e"}},{"title":"Sample Output 1","value":{"format":"MD","content":"\u003cpre\u003e7\n\u003c/pre\u003e \n\u003cp\u003eThere are seven possible pairs: (2,3),(5,3),(2,4),(3,4),(2,5),(3,5),(4,5).\u003c/p\u003e"}},{"title":"Sample Input 2","value":{"format":"MD","content":"\u003cpre\u003e10 0\n\u003c/pre\u003e"}},{"title":"Sample Output 2","value":{"format":"MD","content":"\u003cpre\u003e100\n\u003c/pre\u003e"}},{"title":"Sample Input 3","value":{"format":"MD","content":"\u003cpre\u003e31415 9265\n\u003c/pre\u003e"}},{"title":"Sample Output 3","value":{"format":"MD","content":"\u003cpre\u003e287927211\n\u003c/pre\u003e"}}]}