Greater Integers

input/code.cpp: In function 'int main()':
input/code.cpp:11:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int i = 0; i < s.length(); i++) {
                         ~~^~~~~~~~~~~~
input/code.cpp:15:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if (nxt || (eq == s.length())) {
                     ~~~^~~~~~~~~~~~~
input/code.cpp:16:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             if (s[0] == '9') for (int i = 0; i < s.length() + 1; i++) cout << '1';
                                              ~~^~~~~~~~~~~~~~~~
input/code.cpp:17:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             else for (int i = 0; i < s.length(); i++) cout << (char) (s[0] + 1);
                                  ~~^~~~~~~~~~~~
input/code.cpp:18:34: warning: comparison between signed and unsigned integer expr...

#include <iostream>

using namespace std;

int main() {
    ios_base::sync_with_stdio(false); cin.tie(0);
    int t; cin >> t;
    while (t--) {
        string s; cin >> s;
        int nxt = 0, eq = 0;
        for (int i = 0; i < s.length(); i++) {
            if (s[i] > s[0]) nxt++;
            else if (s[i] == s[0]) eq++;
        }
        if (nxt || (eq == s.length())) {
            if (s[0] == '9') for (int i = 0; i < s.length() + 1; i++) cout << '1';
            else for (int i = 0; i < s.length(); i++) cout << (char) (s[0] + 1);
        } else for (int i = 0; i < s.length(); i++) cout << s[0];
        cout << endl;
    }
    return 0;
}

Test 1

Group: 1, 2

Verdict: WRONG ANSWER

Test 2

Group: 2

Verdict: WRONG ANSWER