PAT1021

#include<iostream>#include<string>using namespace std;int main() {    string s;    cin >> s;    int a[10];    int i;    for (i = 0;i < 10;++i)        a[i] = 0;    for (auto r : s) {        i = r - '0';        ++a[i];    }    for (i = 0;i < 10;++i)        if (a[i] == 0) continue;        else cout << i << ":" << a[i] << endl;    return 0;}

不需要使用map