#include<bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
//using namespace __gnu_pbds;
using namespace std;
typedef long double ld;
typedef long long ll;
typedef unsigned long long ull;
typedef vector<int> vi;
typedef vector<vector<int>> vvi;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef pair<int, int> pi;
typedef pair<ll, ll> pl;
typedef vector<pl> vpl;
typedef vector<ld> vld;
typedef pair<ld, ld> pld;
//typedef tree<ll, null_type, less_equal<ll>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;
template<typename T>
ostream &operator<<(ostream &os, vector<T> &a) {
os << "[";
for (int i = 0; i < ll(a.size()); i++) { os << a[i] << ((i != ll(a.size() - 1) ? " " : "")); }
os << "]\n";
return os;
}
#define all(x) x.begin(),x.end()
#define YES out("YES")
#define NO out("NO")
#define out(x){cout << x << "\n"; return;}
#define GLHF ios_base::sync_with_stdio(false); cin.tie(NULL)
#define print(x){for(auto ait:x) cout << ait << " "; cout << "\n";}
#define pb push_back
#define umap unordered_map
#include "brperm.h"
#include "grader.cpp"
const ll m=1e9+7;
vector<vector<string>>a;
string S;
void init(int n, const char s[]) {
a.resize(n,vector<string>(20));
for(int i=0; i<n; i++)
S+=string(1,s[i]);
for(int i=0; i<n; i++)
a[i][0]=string(1,s[i]);
for(int j=1; j<20; j++)
for(int i=0; i+(1<<j)<=n; i++){
string s1=a[i][j-1],s2=a[i+(1<<(j-1))][j-1];
for(int k=0; k<s1.size(); k++)
a[i][j]+=s1[k],a[i][j]+=s2[k];
}
}
int query(int i, int k) {
return S.substr(i,(1<<k))==a[i][k];
}
Compilation message
brperm.cpp: In function 'void init(int, const char*)':
brperm.cpp:54:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
54 | for(int k=0; k<s1.size(); k++)
| ~^~~~~~~~~~
/usr/bin/ld: /tmp/ccjsCaaw.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccJJQ7Nu.o:brperm.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccjsCaaw.o:(.bss+0x0): multiple definition of `s'; /tmp/ccJJQ7Nu.o:(.bss+0x40): first defined here
collect2: error: ld returned 1 exit status
