Suuremmat

#include <iostream>
#include <string>

using namespace std;

bool a(string str, char f){
    for(char& c : str){
        if(c != f){
            if (c < f){
                return true;
            } else{
                return false;
            }
        }
    }
    return false;
}


int main(){
    int t;
    cin >> t;

    for (int i = 0; i < t; i++)
    {
        string n;
        cin >> n;

        unsigned int len = n.length();

        char f = n[0];

        if(!a(n, f)){
            f++;
        }

        if(f > '9'){
            f = '1';
            len++;
        }

        

        cout << string(len, f) << "\n";
    }
    
    return 0;
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED