제출 #1268965

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1268965		EntityPlantt	Palindromic Partitions (CEOI17_palindromic)	C++20	0 / 100	0 ms	320 KiB

palindromic

#include <bits/stdc++.h>
using namespace std;

const int64_t mod = (srand(time(0)), (int64_t(rand()) << 29) + rand());
constexpr int B = 29;

void solve() {
	string s;
	cin >> s;
	int64_t hf = 0, hb = 0, pow = 1;
	int c = 0;
	#pragma GCC ivdep
	for (char &c : s) c -= 96;
	for (int i = 0; i < s.size() >> 1; i++) {
		hf = (hf * B % mod + s[i]) % mod;
		hb = (hb + pow * s[s.size() - i - 1] % mod) % mod;
		pow = pow * B % mod;
		if (hf == hb) {
			++c;
			hf = hb = 0;
			pow = 1;
		}
	}
	cout << 2 * c + (s.size() & 1 || hf) << '\n';
}

signed main() {
	ios::sync_with_stdio(0);
	cin.tie(0); cout.tie(0);
	int t;
	cin >> t;
	while (t--) solve();
}

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