C++(씨쁠쁠)(cplusplus)-백준(baekjoon)(BaekJoon)코딩 2774번:아름다운 수 답

#include <iostream>
#include <cstring>
using namespace std;
int main() {
    char a[11];
    int t,ans[11];
    cin >> t;
    while (t--)
    {
        int cnt = 0;
        for (int i = 0; i < 11; i++)
        {
            a[i] = '0';
            ans[i] = 0;
        }
        cin >> a;
        for (int i = 0; i < strlen(a); i++)
            ans[a[i] - '0']++;
        for (int i = 0; i < 10; i++)
            if (ans[i] > 0)
                cnt++;
        cout << cnt << '\n';
    }
 
}