#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(signed n, const char s[]) { t.resize(n); for (int j = 0;j<n;j++) t[j] = s[j]; } signed query(signed p, signed k) { if (p+(1LL<<k)-1 >= big(t)) { cout << -1 << '\n'; return; } 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; }

brperm.cpp: In function 'int query(int, int)':
brperm.cpp:34:5: error: return-statement with no value, in function returning 'int' [-fpermissive]
   34 |     return;
      |     ^~~~~~