Submission #1120472

#	Time	Username	Problem	Language	Result	Execution time	Memory
1120472		vjudge1	Palindrome-Free Numbers (BOI13_numbers)	C++17	39.17 / 100	1098 ms	512 KiB

numbers

#include <bits/stdc++.h>

using namespace std;

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;
    
    scanf("%d%d",&a,&b);
    
    for(int i=a;i<=b;i++)
    {
        string s=to_string(i);
        
        if(check(s))
            res++;
    }
    
    printf("%d",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:7:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    7 |     for(int i=0;i<s.size()/2;i++)
      |                 ~^~~~~~~~~~~
numbers.cpp: In function 'bool check(std::string)':
numbers.cpp:16:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |     for(int i=0;i<s.size();i++)
      |                 ~^~~~~~~~~
numbers.cpp:18:24: 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++)
      |                       ~^~~~~~~~~
numbers.cpp: In function 'void solve()':
numbers.cpp:37:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |     scanf("%d%d",&a,&b);
      |     ~~~~~^~~~~~~~~~~~~~

• Subtask 1: 22.5 / 25
• Subtask 2: 16.666666666666668 / 75