Vuodet

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

typedef long long ll;

bool is_leet(int x) {
    int prod = 1337 * x;
    while (prod > 0) {
        if (prod % 10 == x % 10) x /= 10;
        prod /= 10;
        if (x == 0) return true;
    }
    return false;
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int a,b;
    cin >> a >> b;
    vector<int> v;
    for (int i = a; i <= b; i++) {
        if (is_leet(i)) v.push_back(i);
    }
    cout << v.size() << "\n";
    for (int x : v) cout << x << "\n";
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED