제출 #1211543

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1211543		irmuun	Fancy Fence (CEOI20_fancyfence)	C++20	30 / 100	1096 ms	1092 KiB

fancyfence

#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()

const ll mod=1e9+7;

int main(){
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
	ll n;
	cin>>n;
	ll h[n+5],w[n+5];
	for(ll i=1;i<=n;i++){
		cin>>h[i];
	}
	for(ll i=1;i<=n;i++){
		cin>>w[i];
	}
	ll ans=0;
	for(ll i=1;i<=n;i++){
		ans+=(w[i]*(w[i]+1)/2%mod)*(h[i]*(h[i]+1)/2%mod)%mod;
		if(ans>=mod) ans-=mod;
		ll mn=h[i];
		for(ll j=i+1;j<=n;j++){
			mn=min(mn,h[j]);
			ans+=(w[i]*w[j]%mod)*(mn*(mn+1)/2%mod)%mod;
			if(ans>=mod) ans-=mod;
		}
	}
	cout<<ans;
}

• Subtask 1: 0 / 0
• Subtask 2: 12 / 12
• Subtask 3: 0 / 13
• Subtask 4: 0 / 15
• Subtask 5: 0 / 15
• Subtask 6: 18 / 18
• Subtask 7: 0 / 27