제출 #77614

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
77614		ccinv	Dojave (COCI17_dojave)	C++11	0 / 140	1574 ms	82852 KiB

dojave

#include <bits/stdc++.h>
using namespace std;

#define oo 0x3f3f3f3f
#define mp make_pair
#define fi first
#define se second
#define debug(...) fprintf(stderr, __VA_ARGS__), fflush(stderr)
#define FO(i,a,b) for (int i=(a);i<=(b);++i)
#define FD(i,a,b) for (int i=(a);i>=(b);--i)
#define FE(i,G,x) for(int i=(G).h[x];~i;i=(G).v[i].nxt)
typedef long long LL;
typedef pair<int, int> PII;

template <class T> inline bool chkmin(T& x, T y) { return x > y ? x = y, true : false; }
template <class T> inline bool chkmax(T& x, T y) { return x < y ? x = y, true : false; }

inline LL read(void) {
    LL x, f = 1; char ch = getchar();
    for (; !isdigit(ch); ch = getchar()) if (ch == '-') f = -1;
    for (x = 0; isdigit(ch); ch = getchar()) x = x * 10 + ch - '0';
    return x * f;
}

typedef uint_fast64_t U;
#define N ((1<<20)+5)

LL ans;
int m,s,p[N],a[N]; U f[N];
map<U,int> M[4];

mt19937_64 g1(19260817);

int main(void) {
    m=read();s=(1<<m)-1;
    FO(i,0,s) a[i]=read(),p[a[i]]=i;
    FO(i,0,s/2){ f[p[i]]=g1();f[p[s^i]]=f[p[i]]; }

    M[3][0]=1;
    FO(i,0,s){
        f[i]^=f[i-1];
        ans+=M[i%4][f[i]];M[i%4][f[i]]++;
    }
    printf("%lld\n",1ll*(s+1)*(s+2)/2-ans);
    return 0;
}

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