제출 #238199

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
238199		NONAME	Dojave (COCI17_dojave)	C++17	28 / 140	4099 ms	16760 KiB

dojave

#include <bits/stdc++.h>
#define all(x) x.begin(), x.end()
#define sz(x) int(x.size())
#define el '\n'
#define pb push_back
#define mp make_pair
#define ft first
#define sd second
using namespace std;

typedef long long ll;

const int N = (1 << 21);

ll n, a[N], ans;
bool mk[N];

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    cin >> n;
    n = 1 << n;

    for (int i = 0; i < n; ++i)
        cin >> a[i];

    int fx = n - 1;

    for (int i = 0; i < n; ++i) {
        int cur = 0;
        for (int j = i; j < n; ++j) {
            cur ^= a[j];
            mk[a[j]] = 1;

            if (cur == fx) {
                if (j - i + 3 <= n || j - i + 1 > 1)
                    ans++;
            } else {
                bool ok = 0;

                for (int l = i; l <= j; ++l) {
                    int p = (cur ^ fx ^ a[l]);

                    ok |= !mk[p];
                }

                ans += ok;
            }
        }

        for (int j = 0; j < n; ++j)
            mk[j] = 0;
    }

    cout << ans;
}

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