Submission #741974

#	Time	Username	Problem	Language	Result	Execution time	Memory
741974		irmuun	Palindrome-Free Numbers (BOI13_numbers)	C++17	24.17 / 100	1092 ms	312 KiB

numbers

#include<bits/stdc++.h>

using namespace std;

#define pb push_back
#define ll long long
#define ff first
#define ss second
#define all(s) s.begin(),s.end()

ll check(ll n){
    string s=to_string(n);
    for(ll i=0;i<s.size()-1;i++){
        if(s[i]==s[i+1]){
            return 0;
        }
    }
    for(ll i=0;i<s.size()-2;i++){
        if(s[i]==s[i+2]){
            return 0;
        }
    }
    return 1;
}

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    ll a,b;
    cin>>a>>b;
    ll ans=0;
    for(ll i=a;i<=b;i++){
        ans+=check(i);
    }
    cout<<ans;
}

Compilation message (stderr)

numbers.cpp: In function 'long long int check(long long int)':
numbers.cpp:13:17: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |     for(ll i=0;i<s.size()-1;i++){
      |                ~^~~~~~~~~~~
numbers.cpp:18:17: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |     for(ll i=0;i<s.size()-2;i++){
      |                ~^~~~~~~~~~~

• Subtask 1: 12.5 / 25
• Subtask 2: 11.666666666666666 / 75