문제
풀이
#include <iostream>
#include <vector>
using namespace std;
void solve(void) {
int x;
cin >> x;
vector<bool> v(10, false);
while (x) {
v[x%10] = true;
x /= 10;
}
int ans = 0;
for (int i=0; i<10; i++) {
if (v[i]) ans++;
}
cout << ans << "\n";
}
int main(void) {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int t;
cin >> t;
while (t--) {
solve();
}
return 0;
}