Submission #448413

#	Time	Username	Problem	Language	Result	Execution time	Memory
448413		Khizri	Palindrome-Free Numbers (BOI13_numbers)	C++17	24.17 / 100	1099 ms	316 KiB

numbers

#include <bits/stdc++.h>
using namespace std;
//------------------------------DEFINE------------------------------
//******************************************************************
#define IOS ios_base::sync_with_stdio(false); cin.tie(0),cout.tie(0)
#define ll long long
#define pb push_back		 
#define F first																 
#define S second 															 
#define INF 1e18
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define pii pair<int,int>
#define pll pair<ll,ll>
#define OK cout<<"Ok"<<endl;
#define MOD (ll)(1e9+7)
#define endl "\n"
//******************************************************************
//----------------------------FUNCTION------------------------------
//******************************************************************
ll gcd(ll a,ll b){
	if(a>b) swap(a,b);
	if(a==0) return a+b;
	return gcd(b%a,a);
}
ll lcm(ll a,ll b){
	return a/gcd(a,b)*b;
}
bool is_prime(ll n){
	ll k=sqrt(n);
	if(n==2) return true;
	if(n<2||n%2==0||k*k==n) return false;
	for(int i=3;i<=k;i+=2){
		if(n%i==0){
			return false;
		}
	}
	return true;
}
//*****************************************************************
//--------------------------MAIN-CODE------------------------------
const int mxn=1e6+5;
ll t=1,a,b,ans;
bool funk(string s){
	for(int i=0;i<s.size();i++){
		string a="";
		a+=s[i];
		for(int j=i+1;j<s.size();j++){
			a+=s[j];
			string b=a;
			reverse(all(b));
			if(a==b){
				return false;
			}
		}
	}
	return true;
}
void solve(){
	cin>>a>>b;
	for(int i=a;i<=b;i++){
		string s;
		ll k=i;
		while(k>0){
			char c=(k%10)+48;
			k/=10;
			s+=c;
		}
		if(funk(s)){
			ans++;
		}
	}
	cout<<ans<<endl;
}
int main(){
	IOS;
	//cin>>t;
	while(t--){
		solve();
	}
	return 0;
}

Compilation message (stderr)

numbers.cpp: In function 'bool funk(std::string)':
numbers.cpp:45:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |  for(int i=0;i<s.size();i++){
      |              ~^~~~~~~~~
numbers.cpp:48:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |   for(int j=i+1;j<s.size();j++){
      |                 ~^~~~~~~~~

• Subtask 1: 22.5 / 25
• Subtask 2: 1.6666666666666667 / 75