摘要： 文章作者：姜南(Slyar)文章来源：Slyar Home (www.slyar.com) 转载请注明，谢谢合作。下午研究了一下全排列算法，然后发现C++的STL有一个函数可以方便地生成全排列，这就是next_permutation在C++ Reference中查看了一下next_permutation的函数声明：#include <algorithm>bool next_permutation( iterator start, iterator end );Thenext_permutation() function attempts to transform the given 阅读全文

摘要： time limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputPetya loves football very much. One day, as he was watching a football match, he was writing the players' current positions on a piece of paper. To simplify the situation he depicted it as a str 阅读全文

摘要： c语言字符串 数字转换函数大全补充：itoa （将数字转换为字符串）最近学数据结构老是做实验常用到字符串和数字的转换想找却发现网上的资料太散所以搜集整理一下 方便以后再用atof(将字符串转换成浮点型数)atoi(将字符串转换成整型数)atol(将字符串转换成长整型数)strtod(将字符串转换成浮点数)strtol(将字符串转换成长整型数)strtoul(将字符串转换成无符号长整型数)toascii(将整型数转换成合法的ASCII 码字符)toupper(将小写字母转换成大写字母)tolower(将大写字母转换成小写字母) atof(将字符串转换成浮点型数)相关函数 atoi,atol,st 阅读全文