Submission #70269

#	Time	Username	Problem	Language	Result	Execution time	Memory
70269		MladenP	Secret (JOI14_secret)	C++17	0 / 100	688 ms	8552 KiB

secret

#include "secret.h"
#define mid (l+r)/2
int n, a[1010], d[1010][1010];
void init(int l, int r) {
	if(l >= r) return;
	for(int i = mid+1; i <= r; i++) d[mid][i] = Secret(d[mid][i-1], a[i]);
	for(int i = mid-2; i >= l; i--) d[i][mid-1] = Secret(a[i], d[i+1][mid-1]);
	init(l, mid-1); init(mid+1, r);
}
void Init(int N, int A[]) {
	n = N;
	for(int i = 0; i < n; i++) a[i] = A[i-1], d[i][i] = a[i];
	init(1, N);
}
int query(int l, int r, int L, int R) {
	if(L <= mid && mid <= R) {
		if(L < mid) return Secret(d[L][mid-1],d[mid][R]);
		else return d[mid][R];
	}
	if(mid < L) return query(mid+1, r, L, R);
	if(R < mid) return query(l, mid-1, L, R);
}
int Query(int L, int R) {
	if(L == R) return a[L];
	if(L+1 == R) return Secret(a[L], a[R]);
	return query(1, n, L, R);
}

Compilation message (stderr)

secret.cpp: In function 'int query(int, int, int, int)':
secret.cpp:22:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

• Subtask 1: 0 / 100