Fridge

input/code.cpp: In function 'int main()':
input/code.cpp:11:12: warning: array subscript has type 'char' [-Wchar-subscripts]
         v[c]++;
            ^

#include <bits/stdc++.h>

using namespace std;

int v[255];

int main () {
    string s;
    cin>>s;
    for (char c : s) {
        v[c]++;
    }
    
    if (v['0']) {
        char n = '0';
        int l = 10000;
        for (int i = '1'; i <= '9'; i++) {
            if (v[i] < l) n = i, l = v[i];
        }
        if (v['0'] + 1 <= l) {
            cout<<'1';
            for (int i = 0; i <= v['0']; i++) cout<<'0';
            cout<<endl;
            return 0;
        }
        for (int i = 0; i <= l; i++) cout<<n;
        cout<<endl;
    } else {
        for (int i = '1'; i <= '9'; i++) {
            if (!v[i]) cout<<(char)i<<endl, exit(0);
        }
        cout<<"10"<<endl;
    }
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED