답안 #917787

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
917787	2024-01-28T19:26:23 Z	vjudge1	Palindromic Partitions (CEOI17_palindromic)	C++14	100 / 100	97 ms	17140 KB

palindromic

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const ll mod = 1e9+7,P=47,mx=1e6+5;
ll h[mx],p[mx];
string s;
bool check(ll a,ll b,ll l) {
	if(a>b) return false;
	ll h1=(h[a+l-1]-h[a-1]+mod)%mod;
	ll h2=(h[b+l-1]-h[b-1]+mod)%mod;
	return h1*p[b-a]%mod == h2;
}
void solve() {
	cin >> s;
	ll n=ll(s.size());
	for(ll i=1;i<=n;++i) {
		h[i]=(h[i-1]+(s[i-1]-'a'+1)*p[i-1])%mod;
		h[i]%=mod;
	}
	ll l=1,r=n,res=0;
	while(l<=r) {	
		ll k=1;
		while(!check(l,r-k+1,k)) {
			++k;
		}
		if(l==r-k+1) {
			++res;
			break;
		}
		l+=k,r-=k;
		res+=2;
	}
	cout << res;
}
int main() {
	ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
	p[0]=1;
	for(ll i=1;i<mx;++i) {
		p[i]=(p[i-1]*P)%mod;
	}
	ll t; cin >> t;
	while(t--) {
		solve();
		cout << '\n';
	}
	return 0;
}

Subtask #1

15.0 / 15.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	8796 KB	Output is correct
2	Correct	6 ms	8796 KB	Output is correct
3	Correct	6 ms	8792 KB	Output is correct
4	Correct	6 ms	8796 KB	Output is correct
5	Correct	6 ms	8796 KB	Output is correct

Subtask #2

20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	8796 KB	Output is correct
2	Correct	6 ms	8796 KB	Output is correct
3	Correct	6 ms	8792 KB	Output is correct
4	Correct	6 ms	8796 KB	Output is correct
5	Correct	6 ms	8796 KB	Output is correct
6	Correct	6 ms	8796 KB	Output is correct
7	Correct	6 ms	8796 KB	Output is correct
8	Correct	6 ms	8792 KB	Output is correct
9	Correct	6 ms	8836 KB	Output is correct

Subtask #3

25.0 / 25.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	8796 KB	Output is correct
2	Correct	6 ms	8796 KB	Output is correct
3	Correct	6 ms	8792 KB	Output is correct
4	Correct	6 ms	8796 KB	Output is correct
5	Correct	6 ms	8796 KB	Output is correct
6	Correct	6 ms	8796 KB	Output is correct
7	Correct	6 ms	8796 KB	Output is correct
8	Correct	6 ms	8792 KB	Output is correct
9	Correct	6 ms	8836 KB	Output is correct
10	Correct	7 ms	8792 KB	Output is correct
11	Correct	7 ms	8796 KB	Output is correct
12	Correct	7 ms	8836 KB	Output is correct
13	Correct	7 ms	8796 KB	Output is correct

Subtask #4

40.0 / 40.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	8796 KB	Output is correct
2	Correct	6 ms	8796 KB	Output is correct
3	Correct	6 ms	8792 KB	Output is correct
4	Correct	6 ms	8796 KB	Output is correct
5	Correct	6 ms	8796 KB	Output is correct
6	Correct	6 ms	8796 KB	Output is correct
7	Correct	6 ms	8796 KB	Output is correct
8	Correct	6 ms	8792 KB	Output is correct
9	Correct	6 ms	8836 KB	Output is correct
10	Correct	7 ms	8792 KB	Output is correct
11	Correct	7 ms	8796 KB	Output is correct
12	Correct	7 ms	8836 KB	Output is correct
13	Correct	7 ms	8796 KB	Output is correct
14	Correct	97 ms	17140 KB	Output is correct
15	Correct	55 ms	17132 KB	Output is correct
16	Correct	90 ms	17132 KB	Output is correct
17	Correct	52 ms	13560 KB	Output is correct