Submission #286175

#	Time	Username	Problem	Language	Result	Execution time	Memory
286175		YJU	Secret (JOI14_secret)	C++14	100 / 100	513 ms	8696 KiB

secret

#include<bits/stdc++.h>
#include "secret.h"
#pragma GCC optimize("unroll-loops,no-stack-protector")
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> pll;
const ll MOD=1e9+7;
const ll MOD2=998244353;
const ll N=1e3+5;
const ld pi=3.14159265359;
const ll INF=(1LL<<60);
#define SQ(i) ((i)*(i))
#define REP(i,n) for(ll i=0;i<n;i++)
#define REP1(i,n) for(ll i=1;i<=n;i++)
#define pb push_back
#define mp make_pair
#define X first
#define Y second
#define setp setprecision
#define lwb lower_bound
#define SZ(_a) (ll)_a.size()

int pre[N][N],suf[N][N],n,u[N];

void Init(int N,int *a){
	n=N;
	REP(i,n)u[i]=a[i];
	function<void(int,int)> build = [&](int l,int r){
		if(l>=r)return ;
		ll mid=(l+r+1)/2;
		build(l,mid-1);build(mid+1,r);
		pre[mid][mid]=a[mid];
		suf[mid][mid-1]=a[mid-1];
		for(int i=mid+1;i<=r;i++)pre[mid][i]=Secret(pre[mid][i-1],a[i]);
		for(int i=mid-2;i>=l;i--)suf[mid][i]=Secret(a[i],suf[mid][i+1]);
	};
	build(0,N-1);
} 

int q(int l,int r,int ql,int qr){
	ll mid=(l+r+1)/2;
	if(qr<mid-1)return q(l,mid-1,ql,qr);
	if(ql>mid)return q(mid+1,r,ql,qr);
	if(ql==mid)return pre[mid][qr];
	if(qr==mid-1)return suf[mid][ql];
	return Secret(suf[mid][ql],pre[mid][qr]);
}

int Query(int L,int R){
	if(L==R)return u[L];
	return q(0,n-1,L,R);
}

• Subtask 1: 100 / 100