Submission #1120425

#	Time	Username	Problem	Language	Result	Execution time	Memory
1120425		vjudge1	Palindrome-Free Numbers (BOI13_numbers)	C++17	30 / 100	1085 ms	592 KiB

numbers

#include <bits/stdc++.h>

using namespace std;

#define int long long

const int sz=2e5+5;

const int INF=1e18;

const int MOD=1e9+7;

bool check_palindrome(string s)
{
    for(int i=0;i<s.size()/2;i++)
        if(s[i]!=s[s.size()-i-1])
            return false;
    
    return true;
}

bool check(string s)
{
    for(int i=0;i<s.size();i++)
    {
        for(int j=i+1;j<s.size();j++)
        {
            string cur="";
            
            for(int k=i;k<=j;k++)
                cur+=s[k];
            
            if(check_palindrome(cur))
                return false;
        }
    }
    
    return true;
}

void solve()
{
    int a,b,res=0;
    
    cin>>a>>b;
    
    for(int i=a;i<=b;i++)
    {
        string s=to_string(i);
        
        if(check(s))
            res++;
    }
    
    cout<<res;
}

signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    
    int t=1;
    
    //cin>>t;
    
    while(t--)
    {
        solve();
    }
}

Compilation message (stderr)

numbers.cpp: In function 'bool check_palindrome(std::string)':
numbers.cpp:15:18: 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]
   15 |     for(int i=0;i<s.size()/2;i++)
      |                 ~^~~~~~~~~~~
numbers.cpp: In function 'bool check(std::string)':
numbers.cpp:24:18: 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]
   24 |     for(int i=0;i<s.size();i++)
      |                 ~^~~~~~~~~
numbers.cpp:26:24: 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]
   26 |         for(int j=i+1;j<s.size();j++)
      |                       ~^~~~~~~~~

• Subtask 1: 25 / 25
• Subtask 2: 5 / 75