Submission #645991

#	Time	Username	Problem	Language	Result	Execution time	Memory
645991		Vanilla	Brperm (RMI20_brperm)	C++17	50 / 100	3049 ms	2216 KiB

brperm

#include <bits/stdc++.h>
#include "brperm.h"
using namespace std;
const int maxn = 1e5 + 2;
int n;
string s = "";
int rev (int x, int k) {
  int b = 0;
  for (int i = 0; i < k; i++){
    if ((1 << (k - i - 1)) & x) b+=(1 << i);
  }
  return b;
}

void init(int N, const char S[]) {
  n = N;
  s = "";
  for (int i = 0; i < n; i++){
    s.push_back(S[i]);
  }
  return;
}


int query(int l, int k) {
  if (l + (1 << k) > n) return 0;
  bool f = 1;
  for (int i = l; i <= l + (1 << k) - 1; i++){
    if (s[i] != s[rev(i - l, k) + l]) return 0;
  }
  return 1;
}

Compilation message (stderr)

brperm.cpp: In function 'int query(int, int)':
brperm.cpp:27:8: warning: unused variable 'f' [-Wunused-variable]
   27 |   bool f = 1;
      |        ^

• Subtask 1: 13 / 13
• Subtask 2: 37 / 37
• Subtask 3: 0 / 17
• Subtask 4: 0 / 33