#include <bits/stdc++.h>
using namespace std;
#define dbg(x) cerr << #x << ": " << x << endl;
int main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
int m;
cin >> m;
int n = 1 << m;
int max_mask = n - 1;
vector<int> s(n);
vector<uint64_t> xor_hash(n);
mt19937_64 rng(1233);
for (int i = 0; i < n; ++i) {
int x;
cin >> x;
if (x & (1 << (m - 1))) x ^= max_mask;
s[i] = x;
xor_hash[i] = rng();
}
long long ans = 1LL * n * (n + 1) / 2 - (n == 1);
vector<unordered_map<uint64_t, int>> pos(4);
++pos[3][0];
uint64_t pref = 0;
for (int i = 0; i < n; ++i) {
pref ^= xor_hash[s[i]];
ans -= pos[i % 4][pref];
++pos[i % 4][pref];
}
cout << ans << '\n';
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Incorrect |
0 ms |
212 KB |
Output isn't correct |
2 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
468 KB |
Output is correct |
2 |
Correct |
1 ms |
468 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
468 KB |
Output is correct |
2 |
Correct |
2 ms |
724 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
5 ms |
1108 KB |
Output is correct |
2 |
Correct |
3 ms |
852 KB |
Output is correct |
3 |
Correct |
3 ms |
852 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
20 ms |
3720 KB |
Output is correct |
2 |
Correct |
15 ms |
3036 KB |
Output is correct |
3 |
Correct |
33 ms |
5856 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
21 ms |
3824 KB |
Output is correct |
2 |
Correct |
33 ms |
5936 KB |
Output is correct |
3 |
Correct |
111 ms |
13168 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
105 ms |
14268 KB |
Output is correct |
2 |
Correct |
78 ms |
11568 KB |
Output is correct |
3 |
Correct |
77 ms |
11716 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
721 ms |
56512 KB |
Output is correct |
2 |
Correct |
626 ms |
56360 KB |
Output is correct |
3 |
Correct |
309 ms |
34536 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
676 ms |
56380 KB |
Output is correct |
2 |
Correct |
451 ms |
45460 KB |
Output is correct |
3 |
Correct |
588 ms |
48512 KB |
Output is correct |
4 |
Correct |
665 ms |
56620 KB |
Output is correct |