Lista

input/code.cpp: In function 'bool eq(std::__cxx11::string, int)':
input/code.cpp:13:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<s.size();i++)
                 ~^~~~~~~~~
input/code.cpp: In function 'int main()':
input/code.cpp:40:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         while(s.size()>dig(nxt)) nxt++;
               ~~~~~~~~^~~~~~~~~
input/code.cpp:41:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         while(!eq(s, nxt) && s.size()==dig(nxt)) nxt++;
                              ~~~~~~~~^~~~~~~~~~
input/code.cpp:42:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(s.size()<dig(nxt))
            ~~~~~~~~^~~~~~~~~

#include <bits/stdc++.h>

using namespace std;

int n;
bool pos = true;
vector<int> r;

bool eq(string s, int x)
{
    bool res = true;
    reverse(s.begin(), s.end());
    for(int i=0;i<s.size();i++)
    {
        if(s[i] != '?' && s[i]-'0' != x%10) res = false;
        x /= 10;
    }
    return res;
}

int dig(int x)
{
    int res = 0;
    while(x>0)
    {
        res++;
        x /= 10;
    }
    return res;
}

int main()
{
    cin>>n;
    string s;
    int nxt = 1;
    for(int i=0;i<n;i++)
    {
        cin>>s;
        while(s.size()>dig(nxt)) nxt++;
        while(!eq(s, nxt) && s.size()==dig(nxt)) nxt++;
        if(s.size()<dig(nxt))
        {
            pos = false;
            break;
        }
        r.push_back(nxt);
        nxt++;
    }

    if(pos) for(int i=0;i<n;i++)
    {
        cout<<r[i]<<'\n';
    }
    else cout<<"IMPOSSIBLE";
}

Test 1

Group: 1, 2, 3

Verdict: ACCEPTED

Test 2

Group: 2, 3

Verdict: ACCEPTED

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