Vuodet

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

typedef long long ll;


int main(){
    
    int a, b;
    cin >> a >> b;
    vector<int> leet;
    int result = 0;
    for (int i = a; i<=b; ++i){
        int num = i*1337;
        string s = to_string(num);
        string si = to_string(i);
        int cnt=0;
        for (auto u:s){
            if (cnt==0 && u == si[0]) cnt++;
            else if (cnt==1 && u == si[1]) cnt++;
            else if (cnt==2 && u == si[2]) cnt++;
            else if (cnt==3 && u == si[3]) cnt++;
        }
        if (cnt==4) {
            result++;
            leet.push_back(i);
        }
    }
    cout << result << "\n";
    for (auto u:leet){
        cout << u << "\n";
    }
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED