COJ 1373 STL中的map每日四水

统计字母，水题……

#include <iostream>#include <algorithm>#include <map>#include <set>#include <deque>#include <queue>#include <stack>#include <string>#include <cstring>#include <cstdio>#include <cmath>using namespace std;int main(){    map<char,int>p;    map<char,int>::iterator it;    char k,a[101][101];    int n,i,j;    for(k='A';k<='Z';k++)        p[k]=0;    cin>>n;    for(i=0;i<n;i++)        for(j=0;j<n;j++)        {            cin>>a[i][j];            p[a[i][j]]++;        }    for(it=p.begin();it!=p.end();it++)        cout<<it->first<<": "<<it->second<<endl;    return 0;}