Vuodet

input/code.cpp: In function 'bool check_leet(int)':
input/code.cpp:17:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |     for (int i = 0; i < sx.length(); i++) {
      |                     ~~^~~~~~~~~~~~~

#include <iostream>
#include <vector>
#include <string>

using namespace std;

typedef long long ll;
typedef long double ld;

bool check_leet(int y) {
    int leet = 1337;
    int x = y * leet;
    string sx = to_string(x);
    string sy = to_string(y);
    int m = sy.length();
    int j = 0;
    for (int i = 0; i < sx.length(); i++) {
        if (sx[i] == sy[j]) j++;
        if (j == m) break;
    }
    if (j == m) return true;
    return false;
}

void testCase() {
    int a, b; cin >> a >> b;
    vector<int> v;
    for (int i = a; i <= b; i++) {
        if (check_leet(i)) v.push_back(i);
    }
    int n = v.size();
    cout << n << "\n";
    for (int i = 0; i < n; i++) cout << v[i] << "\n";
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    testCase();
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED