Greater Integers

input/code.cpp: In function 'int main()':
input/code.cpp:16:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int i = 1; i < s.length(); i++) {
                         ~~^~~~~~~~~~~~

#include <bits/stdc++.h>

#define int long long

using namespace std;

signed main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int t;
    cin >> t;
    while (t--) {
        string s;
        cin >> s;
        bool flag = false;
        for (int i = 1; i < s.length(); i++) {
            if (s[i]-'0'<s[0]-'0') flag = true;
            else if (s[i]-'0'>s[0]-'0') break;
        }
        int sz = s.length();
        if (s[0] == '9' && !flag) sz++;
        int digit = s[0]-'0';
        if (!flag) {
            if (digit == 9) digit = 1;
            else digit++;
        }
        string res = "";
        for (int i = 0; i < sz; i++) res += (char)(digit+'0');
        cout << res << '\n';
    }
}
/*

*/

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED