Submission #946461

#	Time	Username	Problem	Language	Result	Execution time	Memory
946461		NintsiChkhaidze	Secret (JOI14_secret)	C++17	100 / 100	427 ms	8372 KiB

secret

#include "secret.h"
#include <bits/stdc++.h>
using namespace std;
int val[1003][1003],arr[1003],n;

void dnq(int l,int r){
	if (l == r) return;
	
	int mid = (l + r)/2;
	
	for (int i = mid + 2; i <= r; i++)
		val[mid + 1][i] = Secret(val[mid + 1][i - 1],arr[i]);
		
	for (int i = mid - 1; i >= l; i--)
		val[i][mid] = Secret(arr[i],val[i + 1][mid]);
		
	dnq(l,mid);
	dnq(mid + 1,r);
}
void Init(int N, int A[]) {
	n = N;
	for (int i = 0; i < N; i++){
		val[i][i] = A[i];
		arr[i] = A[i];
	}
	
  	dnq(0,N - 1);
}

int Query(int L, int R) {
	if (L == R) return arr[L];
	
  	int l = 0,r = n - 1;
  	while (1){
	  	int mid = (l + r)/2;
	  	if (L <= mid && mid < R) 
	  		return Secret(val[L][mid],val[mid + 1][R]);	
		
		if (R <= mid){
			r = mid;
		}else{
			l = mid + 1;
		}
  	}
  	
  	return 0;
}

• Subtask 1: 100 / 100