Greater Integers

input/code.cpp: In function 'void Solve()':
input/code.cpp:16:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < s.size(); i++) {
                 ~~^~~~~~~~~~
input/code.cpp:21:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if(cnt_nine == s.size()) {
     ~~~~~~~~~^~~~~~~~~~~
input/code.cpp:22:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i <= s.size(); i++) {
                  ~~^~~~~~~~~~~
input/code.cpp:35:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 1; i < s.size(); i++) {
                 ~~^~~~~~~~~~
input/code.cpp:47:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < s.size(); i++) {
                 ~~^~~~~~~~~~
input/code.cpp:34:6: warning: unused variable 'cur' [-Wunused-variable]
  int cur = s...

#include <bits/stdc++.h>
using namespace std;
#define int long long

void PrintAns(int num, int siz) {
	for(int i = 0; i < siz; i++) {
		cout << num;
	}
	cout << "\n";
}

void Solve() {
	string s;
	cin >> s;
	int cnt_nine = 0;
	for(int i = 0; i < s.size(); i++) {
		if(s[i] == '9') {
			cnt_nine++;
		}
	}
	if(cnt_nine == s.size()) {
		for(int i = 0; i <= s.size(); i++) {
			cout << "1";
		}
		cout << "\n";
		return;
	}
	if(s.size() == 1) {
		int x = s[0] - '0' + 1;
		cout << x << "\n";
		return;
	}
	bool  edge = true;
	int cur = s[0] - '0';
	for(int i = 1; i < s.size(); i++) {
		if(edge && s[i] > s[0]) {
			s[0]++;
			PrintAns(s[0] - '0', s.size());
			return;
		}
		else if(s[i] < s[0]) {
			edge = false;
		}
	}
	if(edge)
		s[0]++;
	for(int i = 0; i < s.size(); i++) {
		cout << s[0];
	}
	cout << "\n";
}

int32_t main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	int t = 1;
	cin >> t;
	while(t--) {
		Solve();
	}
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED