Submission #1297022

#TimeUsernameProblemLanguageResultExecution timeMemory
1297022dostsBrperm (RMI20_brperm)C++20
13 / 100
851 ms2856 KiB
#include "brperm.h"
#include <bits/stdc++.h>
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2")
//#define int long long
#define pii pair<int,int>
#define vi vector<int>
#define ff first
#define ss second
#define sp << " " <<
#define all(x) x.begin(),x.end()
#define big(x) ((int)(x.size()))
using namespace std;
const int MOD = 1e9+7, LIM = 1e6+1, inf = 2e9;

int revbits(int x,int k) {
  int ans = 0;
  for (int j = 0;j<k;j++) {
    if (x&(1LL<<(k-j-1))) ans+=(1LL<<j);
  }
  return ans;
} 

string t;

void init(int n, const char s[]) {
  while (big(t) != n) t+='0';
  for (int j = 0;j<n;j++) t[j] = s[j];
}

int query(int p, int k) {
  if (p+(1LL<<k)-1 >= big(t)) return 0;
  if (k > 12) return 0;
  string tt = t;
  for (int j = 0;j<(1LL<<k);j++) {
    int togo = revbits(j,k);
    //cerr << j sp togo sp k << endl;
    tt[p+togo] = t[p+j];
  }
  //cerr << tt sp t << endl;
  return (tt == t);
}
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