Submission #646288

#	Time	Username	Problem	Language	Result	Execution time	Memory
646288		inksamurai	Dojave (COCI17_dojave)	C++17	0 / 140	2 ms	468 KiB

dojave

#include <bits/stdc++.h>
// cut here
#ifdef _MSC_VER
#include <intrin.h>
#endif
 
namespace atcoder {
 
namespace internal {
 
int ceil_pow2(int n) {
    int x = 0;
    while ((1U << x) < (unsigned int)(n)) x++;
    return x;
}
 
int bsf(unsigned int n) {
#ifdef _MSC_VER
    unsigned long index;
    _BitScanForward(&index, n);
    return index;
#else
    return __builtin_ctz(n);
#endif
}
 
}  // namespace internal
 
}  // namespace atcoder
 
 
namespace atcoder {
 
template <class S, S (*op)(S, S), S (*e)()> struct segtree {
  public:
    segtree() : segtree(0) {}
    segtree(int n) : segtree(std::vector<S>(n, e())) {}
    segtree(const std::vector<S>& v) : _n(int(v.size())) {
        log = internal::ceil_pow2(_n);
        size = 1 << log;
        d = std::vector<S>(2 * size, e());
        for (int i = 0; i < _n; i++) d[size + i] = v[i];
        for (int i = size - 1; i >= 1; i--) {
            update(i);
        }
    }
 
    void set(int p, S x) {
        assert(0 <= p && p < _n);
        p += size;
        d[p] = x;
        for (int i = 1; i <= log; i++) update(p >> i);
    }
 
    S get(int p) {
        assert(0 <= p && p < _n);
        return d[p + size];
    }
 
    S prod(int l, int r) {
        assert(0 <= l && l <= r && r <= _n);
        S sml = e(), smr = e();
        l += size;
        r += size;
 
        while (l < r) {
            if (l & 1) sml = op(sml, d[l++]);
            if (r & 1) smr = op(d[--r], smr);
            l >>= 1;
            r >>= 1;
        }
        return op(sml, smr);
    }
 
    S all_prod() { return d[1]; }
 
    template <bool (*f)(S)> int max_right(int l) {
        return max_right(l, [](S x) { return f(x); });
    }
    template <class F> int max_right(int l, F f) {
        assert(0 <= l && l <= _n);
        assert(f(e()));
        if (l == _n) return _n;
        l += size;
        S sm = e();
        do {
            while (l % 2 == 0) l >>= 1;
            if (!f(op(sm, d[l]))) {
                while (l < size) {
                    l = (2 * l);
                    if (f(op(sm, d[l]))) {
                        sm = op(sm, d[l]);
                        l++;
                    }
                }
                return l - size;
            }
            sm = op(sm, d[l]);
            l++;
        } while ((l & -l) != l);
        return _n;
    }
 
    template <bool (*f)(S)> int min_left(int r) {
        return min_left(r, [](S x) { return f(x); });
    }
    template <class F> int min_left(int r, F f) {
        assert(0 <= r && r <= _n);
        assert(f(e()));
        if (r == 0) return 0;
        r += size;
        S sm = e();
        do {
            r--;
            while (r > 1 && (r % 2)) r >>= 1;
            if (!f(op(d[r], sm))) {
                while (r < size) {
                    r = (2 * r + 1);
                    if (f(op(d[r], sm))) {
                        sm = op(d[r], sm);
                        r--;
                    }
                }
                return r + 1 - size;
            }
            sm = op(d[r], sm);
        } while ((r & -r) != r);
        return 0;
    }
 
  private:
    int _n, size, log;
    std::vector<S> d;
 
    void update(int k) { d[k] = op(d[2 * k], d[2 * k + 1]); }
};
 
}  // namespace atcoder
// cut here 
using namespace std;
#define int ll
#define rep(i,n) for(int i=0;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define rng(i,c,n) for(int i=c;i<n;i++)
#define pb push_back
#define sz(a) (int)a.size()
#define vec(...) vector<__VA_ARGS__>
#define _3dSgv16 ios::sync_with_stdio(0),cin.tie(0)
typedef long long ll;
using vi=vector<int>;
void print(){cout<<'\n';}
template<class h,class...t>
void print(const h&v,const t&...u){cout<<v<<' ',print(u...);}
// e

int op(int l,int r){return l+r;}
int e(){return 0;}

int opa(int l,int r){return max(l,r);}
int ea(){return 0;}

signed main(){
_3dSgv16;
	int ln;
	cin>>ln;
	assert(ln==2);
	const int n=1<<ln;
	vi a(n);
	rep(i,n){
		cin>>a[i];
	}
	vi ps;
	rep(i,n){
		ps.pb((!sz(ps)?0:ps.back())^a[i]);
	}
	vi ids(n);
	rep(i,n){
		ids[a[i]]=i;
	}
	vi rbe(n);
	rep(i,n){
		rbe[i]=ids[(n-1)^a[i]];
	}
	atcoder::segtree<int,opa,ea> segma(rbe);
	int ans=(n*(n+1))/2;
	const int w=4;
	for(int d=0;d<w;d++){
		atcoder::segtree<int,op,e> seg(n);
		priority_queue<int> pq;
		for(int i=d,t=0;i<n;i+=w,t+=1){
			int l=0,r=t-1;
			int c=-1;
			while(l<=r){
				int m=(l+r)/2;
				if(segma.prod(m*w+d+1,i+1)<=i){
					c=m,r=m-1;
				}else{
					l=m+1;
				}
			}
			if(c!=-1){
				ans-=seg.prod(c*w+d,i);
			}
			// cut on i-th position
			pq.push(i);
			seg.set(i,1);
			int mi=n;
			rng(j,i+1,min(n,i+w+1)){
				mi=min(mi,rbe[j]);
			}
			// if(i+w==8) print(mi);
			while(sz(pq)){
				int j=pq.top();
				if(j>=mi){
					seg.set(j,0);
					pq.pop();
				}else{
					break;
				}
			}
		}
	}
	int ma=-1;
	rep(i,n){
		ma=max(ma,rbe[i]);
		if(i%4==3){
			if(ma<=i){
				// cout<<i<<" ";
				ans-=1;
			}
		}	
	}
	print(ans);
}

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