Suuremmat

input/code.cpp: In function 'int main()':
input/code.cpp:13:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i = 1; i < n.size(); ++i) {
                   ~~^~~~~~~~~~
input/code.cpp:23:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i <= n.size(); ++i)
                     ~~^~~~~~~~~~~
input/code.cpp:27:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < n.size(); ++i)
                     ~~^~~~~~~~~~

#include <iostream>

using namespace std;
using ll = long long;

int main() {
	int t;
	string n;
	cin >> t;
	while (t --> 0) {
		cin >> n;
		int k = -1;
		for (int i = 1; i < n.size(); ++i) {
			if (n[i-1] > n[i]) {
				k = n[0]-'0';
				break;
			} else if (n[i-1] < n[i]) {
				k = n[0]-'0'+1;
			}
		}
		if (k == -1) {
			if (n[0] == '9') {
				for (int i = 0; i <= n.size(); ++i)
					cout << 1;
				cout << endl;
			} else {
				for (int i = 0; i < n.size(); ++i)
					cout << n[0]-'0'+1;
				cout << endl;
			}
		} else {
			int s = n.size();
			if (k == 10) {
				k = 1;
				++s;
			}
			for (int i = 0; i < s; ++i)
				cout << k;
			cout << endl;
		}
	}
}

Test 1

Group: 1, 2

Verdict: WRONG ANSWER

Test 2

Group: 2

Verdict: WRONG ANSWER