摘要：
#include<iostream>#include<map>#include<utility>#include<string>using namespace std;int main(){ multimap<string,string>courses; typedef multimap<strin 阅读全文
摘要：
#include<iostream>#include<map>#include<cctype>using namespace std;int main(){ map<char,int>s; char c; do{ cin>>c; if(isalpha(c)){ c=tolower(c); s[c]+ 阅读全文