Submission #1135881

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1135881	2025-01-14 07:43:18	daoquanglinh2007	Secret (JOI14_secret)	C++20	100 / 100	341 ms	12180 KiB

secret

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#include <bits/stdc++.h>
#include "secret.h"
using namespace std;
const int NM = 1000;
int N, A[NM+5];
int f[4*NM+5][NM+5];
void build(int id, int l, int r, int t){
  if (t == 0){
    f[id][l] = A[l];
    for (int i = l+1; i <= r; i++)
      f[id][i] = Secret(f[id][i-1], A[i]);
  }
  if (t == 1){
    f[id][r] = A[r];
    for (int i = r-1; i >= l; i--)
      f[id][i] = Secret(A[i], f[id][i+1]);
  }
  if (l == r) return;
  int mid = (l+r)/2;
  build(2*id, l, mid, 1);
  build(2*id+1, mid+1, r, 0);
}
void Init(int _N, int _A[]){
  N = _N;
  for (int i = 1; i <= N; i++) A[i] = _A[i-1];
  build(1, 1, N, -1);
 
 
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• Subtask 1: 100 / 100