Vuodet

input/code.cpp: In function 'bool is_leet(int)':
input/code.cpp:12:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |         for (int i = 0; i < s.size(); i++) {
      |                         ~~^~~~~~~~~~
input/code.cpp:14:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |                 if (match_i == match.size()) return true;
      |                     ~~~~~~~~^~~~~~~~~~~~~~~

#include<iostream>
#include<string>
#include<vector>
using namespace std;

bool is_leet(int x) {
	string s = to_string(x * 1337);
	string match = to_string(x);

	int match_i = 0;

	for (int i = 0; i < s.size(); i++) {
		if (s[i] == match[match_i]) match_i++;
		if (match_i == match.size()) return true;
	}
	return false;
}

int main() {
	int n,m;
	cin >> n >> m;


	vector<int> results;
	for (int i = n; i <= m; i++) {
		if (is_leet(i)) results.push_back(i);	
	}
	cout << results.size() << "\n";
	for (auto u : results) cout << u << "\n";
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED