Lista

input/code.cpp: In function 'int main()':
input/code.cpp:41:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for (int j = 0; j < l.length(); j++)
                    ~~^~~~~~~~~~~~
input/code.cpp:54:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if (v.size() != i+1) {
       ~~~~~~~~~^~~~~~

#include <iostream>
#include <string>
#include <math.h>
#include <map>
#include <algorithm>
#include <vector>
#include <fstream>
#include <set>
#include <unordered_map>
#include <queue>
#include <climits>
#include <stack>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
#define LOOP(i,a,l) for (int i = a; i < l; i++)
#define LUO_VERKKO LOOP(i,0,m) {int a,b; cin >> a >> b; v[a].push_back(b); v[b].push_back(a);}
#define COLLECT for (int i = 0; i < n; i++) cin >> s[i]
#define PRINT_LIST(l) for (int i = 0; i < l.size(); i++) cout << l[i] << " "
#define S second
#define F first
#define A 999999999999999999LL
#define M 1000000007
//https://cses.fi/dt/
int n;
int t;
#define N (1<<17)
int main() {
	cin >> n;
	int lastNum = 0;
	vector<int> v;
	for (int i = 0; i < n; i++)
	{
		string l; cin >> l;
		int max = pow(10,l.length())-1;
		int min = pow(10,l.length() - 1);
		for (int num = min; num <= max; num++)
		{
			string s = to_string(num);
			bool fail = false;
			for (int j = 0; j < l.length(); j++)
			{
				if (l[j] != '?' && l[j] != s[j]) {
					fail = true;
					break;
				}
			}
			if (!fail && num > lastNum) {
				v.push_back(num);
				lastNum = num;
				break;
			}
		}
		if (v.size() != i+1) {
			cout << "IMPOSSIBLE";
			exit(0);
		}
	}
	for (int i : v) {
		cout << i << "\n";
	}
}

Test 1

Group: 1, 2, 3

Verdict: ACCEPTED

Test 2

Group: 2, 3

Verdict: TIME LIMIT EXCEEDED

Test 3

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 4

Group: 1, 2, 3

Verdict: ACCEPTED

Test 5

Group: 1, 2, 3

Verdict: ACCEPTED

Test 6

Group: 1, 2, 3

Verdict: ACCEPTED

Test 7

Group: 1, 2, 3

Verdict: ACCEPTED

Test 8

Group: 3

Verdict: ACCEPTED

Test 9

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 10

Group: 3

Verdict: TIME LIMIT EXCEEDED