Submission #1120854

#	Time	Username	Problem	Language	Result	Execution time	Memory
1120854		vjudge1	Palindrome-Free Numbers (BOI13_numbers)	C++17	45.83 / 100	1082 ms	512 KiB

numbers

#include "bits/stdc++.h"
#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define ll long long
#define pb push_back
#define in insert
#define F first
#define S second
#define vll vector<ll>
#define all(v) v.begin(),v.end()
#define endl '\n'
#define pii pair<ll,ll>
using namespace std;
const ll INF =1e18, mod = 1e9 + 7, N = 1e5 + 5;

bool free(ll n){
    string s = to_string(n);
    for(int i = 0; i < s.size(); i++){
        for(int j = i + 1; j < s.size(); j++){
            string neww = s.substr(i, j - i + 1);
            string e = neww;
            reverse(all(neww));
            if(neww == e){
                return false;
            }
        }
    }
    return true;
}
void solve(){
    int a,b;
    cin >> a >> b;
    int cnt = 0;
    for(int i = a; i <= b; i++){
        
        if(free(i)){
            cnt++;
        }
    }
    cout << cnt << endl;
}
int main(){
    fast;
    solve();
    return 0;
}

Compilation message (stderr)

numbers.cpp: In function 'bool free(long long int)':
numbers.cpp:17:22: 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 < s.size(); i++){
      |                    ~~^~~~~~~~~~
numbers.cpp:18:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |         for(int j = i + 1; j < s.size(); j++){
      |                            ~~^~~~~~~~~~

• Subtask 1: 22.5 / 25
• Subtask 2: 23.333333333333332 / 75