Submission #922559

#	Time	Username	Problem	Language	Result	Execution time	Memory
922559		hqminhuwu	Secret (JOI14_secret)	C++14	0 / 100	366 ms	14136 KiB

secret

#include "secret.h"
#define forr(_a,_b,_c) for(int _a = (_b); _a <= (_c); ++_a)
#define ford(_a,_b,_c) for(int _a = (_b) + 1; _a --> (_c);)
#define forf(_a,_b,_c) for(int _a = (_b); _a < (_c); ++_a)
#define st first
#define nd second
#define ll long long
 
using namespace std;
const int N = 2e3 + 5;
const ll oo = 1e9;
const ll mod = 1e9 + 7;
 
int n, f[N][N];
 
void calc (int l, int r, int a[]){
 
	int mid = (l + r) / 2;
	f[mid][mid] = a[mid];
	f[mid + 1][mid + 1] = a[mid + 1];
 
	for (int i = mid + 2; i <= r; i++)
		f[mid + 1][i] = Secret(a[i], f[mid + 1][i - 1]);
	for (int i = mid - 1; i >= l; i--)
		f[mid][i] = Secret(a[i], f[mid][i + 1]);
 
	
	if (l < mid) calc (l, mid, a);
	if (mid + 1 < r) calc (mid + 1, r, a);
}
 
void Init (int u, int a[]){
	n = u;
	calc (0, n - 1, a);
}
 
int Query (int u, int v){
	int l = 0, r = n - 1;
	
	while (l != r){
		int mid = (l + r) / 2;
		if (mid >= u && mid < v) return Secret(f[mid][u], f[mid + 1][v]);
		if (mid == v) return f[mid][u];
		if (mid < u) l = mid + 1;
		else r = mid;
	}
 
	return f[l][l];
}
 
 
/*
 
 
 
*/
 

• Subtask 1: 0 / 100