Submission #52578

#	Time	Username	Problem	Language	Result	Execution time	Memory
52578		ics0503	Secret (JOI14_secret)	C++17	100 / 100	647 ms	12780 KiB

secret

#include "secret.h"
int a[1212], n;
int L[2212][1212];
int R[2212][1212];
void init(int now, int s, int e) {
	if (s == e)return;
	int m = (s + e) / 2;
	init(now * 2, s, m), init(now * 2 + 1, m + 1, e);
	L[now][0] = a[m]; R[now][0] = a[m + 1];
	for (int i = m - 1, j = 1; i >= s; i--, j++)L[now][j] = Secret(a[i], L[now][j - 1]);
	for (int i = m + 2, j = 1; i <= e; i++, j++)R[now][j] = Secret(R[now][j - 1], a[i]);
}
void Init(int N, int A[]) {
	n = N;
	for (int i = 0; i < N; i++)a[i] = A[i];
	init(1, 0, n - 1);
}
int QR(int now, int l, int r, int s, int e) {
	int m = (s + e) / 2;
	if (l == 264 && r == 271)
		int sp = 1;
	if (r <= m)return QR(now*2, l, r, s, m);
	if (m < l)return QR(now*2+1, l, r, m + 1, e);
	return Secret(L[now][m - l], R[now][r - (m + 1)]);
}
int Query(int L, int R) {
	if (L == R)return a[L];
	return QR(1, L, R, 0, n - 1);
}

Compilation message (stderr)

secret.cpp: In function 'int QR(int, int, int, int, int)':
secret.cpp:21:7: warning: unused variable 'sp' [-Wunused-variable]
   int sp = 1;
       ^~

• Subtask 1: 100 / 100