Submission #670381

#	Time	Username	Problem	Language	Result	Execution time	Memory
670381		Mohammad_Parsa	Palindromic Partitions (CEOI17_palindromic)	C++17	100 / 100	56 ms	11780 KiB

palindromic

/* in the name of allah */
#include<bits/stdc++.h>
using namespace std;

//#define endl '\n'
#define pb push_back
#define F first
#define S second
#define mk make_pair
typedef long long ll;

const ll N=1e6+7,mod=1e13+3,mab=27;

int main(){
	ios:: sync_with_stdio(0),cin.tie(0),cout.tie(0);
	int q;
	cin>>q;
	while(q--){
		string s;
		cin>>s;
		ll h1=0,h2=0,t=1;
		int j=s.size()-1,sz=s.size();
		int ans=0;
		for(int h=0;h<=sz/2-1;h++){
			//cout<<sz/2-1<<endl;
			h1=h1*mab%mod;h1=(h1+s[h]-'a'+1)%mod;
			h2=(h2+(s[j-h]-'a'+1)*t)%mod;t=t*mab%mod;
			if(h1==h2){
				ans+=2;
				t=1;h1=0;h2=0;
			}
		}
		if(h1!=0 || s.size()%2==1)ans++;

		cout<<ans<<endl;
	}
}

• Subtask 1: 15 / 15
• Subtask 2: 20 / 20
• Subtask 3: 25 / 25
• Subtask 4: 40 / 40