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답안 #630870

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
630870 2022-08-17T09:36:12 Z inksamurai Zoltan (COCI16_zoltan) C++17
112 / 140
 232 ms 19848 KB 
#include <bits/stdc++.h>
#define int ll
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
#define rng(i,c,n) for(int i=c;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define fi first
#define se second
#define pb push_back
#define sz(a) (int)a.size()
#define vec(...) vector<__VA_ARGS__>
#define _3phCa4T ios::sync_with_stdio(0),cin.tie(0)
typedef long long ll;
using pii=pair<int,int>;
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

// snuke's mod int
template<ll mod>
struct modint{
	ll x;
	modint(ll x=0):x((x%mod+mod)%mod){}
	modint& operator+=(const modint a){if((x+=a.x)>=mod)x-=mod; return *this;}
	modint& operator-=(const modint a){if((x+=mod-a.x)>=mod)x-=mod; return *this;}
	modint& operator*=(const modint a){(x*=a.x)%=mod; return *this;}
	modint operator+(const modint a)const{modint res(*this); return res+=a;}
	modint operator-(const modint a)const{modint res(*this); return res-=a;}
	modint operator*(const modint a)const{modint res(*this); return res*=a;}
	modint pow(ll n)const{
		modint res=1,x(*this);
		while(n){
			if(n&1)res*=x;
			x*=x;
			n/=2;
		}
		return res;
	}
};

using mint=modint<1000000007>;

struct N{
	int len;
	mint wys;
	N(int _len=0,mint _wys=0):
	len(_len),wys(_wys){}
};

N op(N l,N r){
	if(l.len!=r.len){
		return l.len>r.len?l:r;
	}
	l.wys+=r.wys;
	return l;
}
N e(){
	return {0,0};
}

template<class S,S (*op)(S,S),S (*e)()>
struct segtree{
	int n;
	vec(S) seg;
	segtree(int _n){
		init(_n);
	}
	void init(int _n){
		n=1;
		while(n<=_n){
			n*=2;
		}
		seg=vec(S)(2*n);
		n=_n;
	}
	S prod(int node,int l,int r,int _l,int _r){
		if(l>=_r or r<=_l){
			return e();
		}
		if(_l<=l and r<=_r){
			return seg[node];
		} 
		int m=(l+r)>>1;
		return op(prod(node*2,l,m,_l,_r),prod(node*2+1,m,r,_l,_r));
	}
	S prod(int l,int r){
		return prod(1,0,n,l,r);
	}
	void set(int node,int l,int r,int pos,const S&x){
		if(l==r-1){
			seg[node]=x;
			return;
		}
		int m=(l+r)/2;
		if(pos<m){
			set(node*2,l,m,pos,x);
		}else{
			set(node*2+1,m,r,pos,x);
		}
		seg[node]=op(seg[node*2],seg[node*2+1]);
	}
	void set(int pos,const S&x){
		set(1,0,n,pos,x);
	}
	S get(int pos){
		return prod(1,0,n,pos,pos+1);
	}
};

signed main(){
_3phCa4T;
	int n;
	cin>>n;
	vi a(n);
	rep(i,n){
		cin>>a[i];
	}
	vi tmp=a;
	sort(tmp.begin(), tmp.end());
	tmp.erase(unique(tmp.begin(), tmp.end()),tmp.end());
	const int m=sz(tmp);
	rep(i,n){
		a[i]=lower_bound(tmp.begin(), tmp.end(),a[i])-tmp.begin();
	}
	int len=0;
	mint wys=0;
	segtree<N,op,e> fseg(m),gseg(m);
	per(i,n){
		int v=a[i];
		N fres=fseg.prod(v+1,m);
		N gres=gseg.prod(0,v);
		if(!fres.len) fres.wys=1;
		if(!gres.len) gres.wys=1;
		int now=fres.len+gres.len+1;
		if(now>len){
			len=now;
			wys=fres.wys*gres.wys*mint(2).pow(n-now);
		}else if(now==len){
			wys+=fres.wys*gres.wys*mint(2).pow(n-now);
		}
		fres.len+=1;
		gres.len+=1;
		fseg.set(v,fres);
		gseg.set(v,gres);
	}
	print(len,wys.x);
}

Subtask #1
112.0 / 140.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 2 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 133 ms 19096 KB Output is correct
12 Correct 110 ms 18860 KB Output is correct
13 Correct 97 ms 10556 KB Output is correct
14 Correct 176 ms 18896 KB Output is correct
15 Correct 201 ms 19332 KB Output is correct
16 Correct 232 ms 19788 KB Output is correct
17 Incorrect 168 ms 19848 KB Output isn't correct
18 Incorrect 203 ms 19788 KB Output isn't correct
19 Incorrect 183 ms 19828 KB Output isn't correct
20 Incorrect 171 ms 19840 KB Output isn't correct