Greater Integers

input/code.cpp: In function 'int main()':
input/code.cpp:19:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for (int j = 0; j < s.length(); j++) {
                             ~~^~~~~~~~~~~~
input/code.cpp:31:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
                     for (int j = 0; j < s.length() + 1; j++) {
                                     ~~^~~~~~~~~~~~~~~~
input/code.cpp:36:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
                     for (int j = 0; j < s.length(); j++) {
                                     ~~^~~~~~~~~~~~

#include <bits/stdc++.h>
#define FR(i, N) for (int i = 0; i < int(N); i++)
#define all(x) begin(x), end(x)

using namespace std;

using ll = long long;

int main() {
	cin.tie(0);
	cin.sync_with_stdio(0);
	int T;
	cin >> T;
	while (T-->0) {
        string s;
        cin >> s;
        for (int i = 10; i >= 0; i--) {
            bool good = false;
            for (int j = 0; j < s.length(); j++) {
                if (i > s[j] - '0') {
                    good = true;
                    break;
                }
                else if (i < s[j] - '0') {
                    break;
                }
            }
            if (!good) {
                i++;
                if (i == 10) {
                    for (int j = 0; j < s.length() + 1; j++) {
                        cout << 1;
                    }
                }
                else {
                    for (int j = 0; j < s.length(); j++) {
                        cout << i;
                    }
                }
                cout << '\n';
                break;
            }
        }
	}
	return 0;
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED