Vuodet

#include <bits/stdc++.h>
#define F first
#define S second
#define X real()
#define Y imag()
using namespace std;
typedef long long ll;
typedef long double ld;

bool isLeet(int a) {
    int b = 1337*a;
    vector<int> numA, numB;
    while (a) {
        numA.push_back(a%10);
        a/=10;
    }
    while (b) {
        numB.push_back(b%10);
        b/=10;
    }
    int pa= numA.size()-1;
    for (int pb = numB.size()-1; pb >= 0; pb--) {
        if (numB[pb] == numA[pa]) pa--;
        if (pa == -1) return true;
    }
    return false;
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int a, b;
    cin>>a>>b;
    vector<int> leets;
    for (int i=a; i<=b; i++) {
        if (isLeet(i)) leets.push_back(i);
    }
    cout<<leets.size()<<"\n";
    for (int i : leets) cout<<i<<"\n";
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED