Submission #857252

#	Time	Username	Problem	Language	Result	Execution time	Memory
857252		divad	Brperm (RMI20_brperm)	C++14	Compilation error	0 ms	0 KiB

brperm

#include <bits/stdc++.h>
#include "brperm.h"
using namespace std;
string str;

void init(int n, const char s[]) {
  str = s;
}

int rev_bits(int x, int k){
    int ans = 0;
    for(int i = 0; i < k; i++){
        int bt = (x>>i)&1;
        ans += bt*(1<<(k-i-1));
    }
    return ans;
}

int query(int i, int k){
    int len = (1<<k);
    string sub = str.substr(pos, len);
    for(int i = 0; i < len; i++){
        if(sub[i] != sub[rev_bits(i, k)]){
            return false;
        }
    }
    return true;
}

Compilation message (stderr)

brperm.cpp: In function 'int query(int, int)':
brperm.cpp:21:29: error: 'pos' was not declared in this scope; did you mean 'pow'?
   21 |     string sub = str.substr(pos, len);
      |                             ^~~
      |                             pow