{"trustable":false,"prependHtml":"\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 async src\u003d\"https://mathjax.codeforces.org/MathJax.js?config\u003dTeX-AMS-MML_HTMLorMML\" type\u003d\"text/javascript\"\u003e\u003c/script\u003e","sections":[{"title":"","value":{"format":"PLAIN","content":" 看到沐泽的单数,吾意师姐暗下决心,准备每天接单,立志超过沐泽。现在问题来了,如果第一天吾意师姐接1单,第二天接2单,以此类推......n天过后,吾意师姐共接了几单?"}},{"title":"Input","value":{"format":"PLAIN","content":"多组输入,每一组输入会包含一个整数n"}},{"title":"Output","value":{"format":"PLAIN","content":"对于每一组输入,单独一行输出和,答案后再输出一行空行。\n和的数值最大不会超过一个32位的int类型。"}},{"title":"Sample Input","value":{"format":"PLAIN","content":"2\n100"}},{"title":"Sample Output","value":{"format":"PLAIN","content":"3\n\n5050"}},{"title":"Hint","value":{"format":"PLAIN","content":"C语法:\n\twhile(scanf(\"%d %d\",\u0026a, \u0026b) !\u003d EOF) \n\t{ \u000b .... \u000b} \nC++语法:\n\twhile( cin \u003e\u003e a \u003e\u003e b ) \u000b{ \u000b .... \u000b} \n\nScanf函数返回值就是读出的变量个数,如:scanf( “%d %d”, \u0026a, \u0026b ); \u000b如果只有一个整数输入,返回值是1,如果有两个整数输入,返回值是2,如果一个都没有,则返回值是-1。\nEOF是一个预定义的常量,等于-1。\n这道题用while(scanf(\"%d\",\u0026a) !\u003d EOF) 或while( cin \u003e\u003e a )或 while(scanf(\"%d\",\u0026a) \u003d\u003d1) \n\n"}}]}