This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#include "interactive.h"
using namespace std;
#define isz(a) (int)(a).size()
#define pii pair <int, int>
#define fi first
#define se second
#define mp make_pair
map <int, int> cnt[7], tmp;
vector <int> comp(vector <int> a, vector <int> b){
vector <int> c(0);
int j = 0;
for (int i = 0; i < isz(b); i++){
while (j < isz(a) && a[j] < b[i]) c.push_back(a[j++]);
j++;
}
while (j < isz(a)) c.push_back(a[j++]);
return c;
}
bool cmp(int x, int y){
return __builtin_popcount(x) > __builtin_popcount(y);
}
vector <int> guess(int n){
vector <int> ans(n);
ans[0] = ask(1);
for (int i = 0; (1<<i) < n; i++){
vector <int> a(0), b(0);
for (int j = 1; j < n; j++)
if ((j>>i)&1) b.push_back(j+1);
a = b;
a.push_back(1);
vector <int> c = comp(get_pairwise_xor(a), get_pairwise_xor(b));
for (int j = 1; j < isz(c); j += 2) cnt[i][c[j]^ans[0]]++;
}
vector <int> ord(0);
for (int i = 1; i < n; i++) ord.push_back(i);
sort(ord.begin(), ord.end(), cmp);
for (int t = 0; t < isz(ord); t++){
int i = ord[t];
for (int j = 0; (1<<j) < n; j++)
if ((i>>j)&1){
for (pii P : cnt[j]){
if (P.se == 0) continue;
bool ok = 1;
for (int k = j+1; (1<<k) < n; k++)
if (((i>>k)&1) && cnt[k][P.fi] == 0){
ok = 0;
break;
}
if (ok){
ans[i] = P.fi;
for (int k = 0; (1<<k) < n; k++)
if ((i>>k)&1){
cnt[k][P.fi]--;
}
break;
}
}
break;
}
}
return ans;
}
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