用字符串处理输入的数字，然后哈希表记录出现的次数即可。

#include <iostream>
#include <map>
#include <cstring>
using namespace std;
int main()
{
    string str;
    cin >> str;
    map<char, unsigned> dict;
    for (char c : str)
    {
        dict[c]++;
    }
    for (unsigned i = 0; i <= 9; i++)
    {
        cout << dict[i + 48] << endl;
    }
    return 0;
}