Submission #508651

#	Time	Username	Problem	Language	Result	Execution time	Memory
508651		Abrar_Al_Samit	Secret (JOI14_secret)	C++17	0 / 100	472 ms	4396 KiB

secret

#include "secret.h"
#include <bits/stdc++.h>
const int MX = 1001;
int tab[10][MX];
int mask[MX];
int n, a[MX];
void prepare(int l, int r, int level) {
  if(l==r) return;
  int m = (l+r)/2;
  tab[level][m] = a[m];
  for(int i=m-1; i>=l; --i) {
    tab[level][i] = Secret(a[i], tab[level][i+1]);
  }
  for(int i=m+1; i<=r; ++i) {
    tab[level][i] = Secret(a[i], tab[level][i-1]);
    mask[i] ^= 1<<level;
  }
  prepare(l, m, level+1);
  prepare(m+1, r, level+1);
}
void Init(int N, int A[]) {
  n = N;
  for(int i=0; i<n; ++i) {
    a[i] = A[i];
  }
  prepare(0, n-1, 0);
}

int Query(int L, int R) {
  if(L==R) return a[L];
  int level = __builtin_ctz(mask[L]^mask[R]);
  return Secret(tab[level][L], tab[level][R]);
}

• Subtask 1: 0 / 100