#include "minerals.h"
#include<bits/stdc++.h>
#define ll int
#define pb push_back
#define sz(a) ((ll)(a).size())
using namespace std;
void Solve(int n, ll crr=0)
{
vector <ll> A, B, a(n*2+1, 0);
auto flip=[&](ll idx)
{
ll x=Query(idx)-crr;
crr+=x, a[idx]^=1; return x;
};
for (ll i=1; i<=n*2; i++) (flip(i)?A:B).pb(i);
function <void(vector <ll>, vector <ll>, bool)>
solve=[&](vector <ll> L, vector <ll> R, bool cr)
{
ll n=sz(L);
if (n==1) {Answer(L[0], R[0]); return;}
vector <ll> left, right;
ll len=max(1.0, 0.4*n);
for (ll i=0; i<len; i++) flip(L[i]);
for (ll i:R)
{
if (sz(left)==len) right.pb(i);
else if (sz(right)==len) left.pb(i);
else (a[i]^(a[i]+flip(i))^cr?right:left).pb(i);
}
solve(vector <ll> (L.begin(), L.begin()+len), left, cr^1);
solve(vector <ll> (L.begin()+len, L.end()), right, cr);
}; solve(A, B, 1);
}
Compilation message
/usr/bin/ld: /tmp/ccfXsHX0.o: in function `main':
grader.cpp:(.text.startup+0xbd): undefined reference to `Solve(int)'
collect2: error: ld returned 1 exit status
