Submission #936273

#	Time	Username	Problem	Language	Result	Execution time	Memory
936273		Aiperiii	Palindromic Partitions (CEOI17_palindromic)	C++14	0 / 100	6 ms	8024 KiB

palindromic

#include <bits/stdc++.h>
#define int long long
#define ff first
#define ss second
#define pb push_back
#define all(x) x.begin(),x.end()
using namespace std;
const int N=1e6+5,tt=10,mod=1e9+7;
int pw[N];
signed main(){
    pw[0]=1;
    for(int i=1;i<N;i++)pw[i]=pw[i-1]*tt%mod;
    int t;
    cin>>t;
    while(t--){
        string s;
        cin>>s;
        int l=0,r=s.size()-1;
        int sz=0,x=0,y=0,res=0;
        while(l<r){
            sz++;
            x+=pw[sz]*(s[l]-'a'+1)%mod;
            y*=tt%mod;
            y+=(s[r]-'a'+1)*tt%mod;
            if(x==y){
                res+=2;
                x=0;y=0;sz=0;
            }
            l++;r--;
        }
        if(l==r)sz++;
        if(sz)res++;
        cout<<res<<"\n";
    }
}
/*
4
bonobo
deleted
racecar
racecars
 */

• Subtask 1: 0 / 15
• Subtask 2: 0 / 20
• Subtask 3: 0 / 25
• Subtask 4: 0 / 40