제출 #900668

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
900668		3laa	Fancy Fence (CEOI20_fancyfence)	C++14	15 / 100	57 ms	3924 KiB

fancyfence

#define fast ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0)
#include <bits/stdc++.h>
#include <unordered_map>
#define endl '\n'
#define mid ((l+r)/2)
#define  F first
#define  S second
#define pb push_back
#define yes void (cout<<"YES"<<endl)
#define no void (cout<<"NO"<<endl)
#define ump unordered_map <ll,ll>
#define sp " "
#define vll vector<ll>
#define vint vector<int>
#define pll pair<ll,ll>
typedef long long ll;
using namespace std;
const ll inf=1e18+9;
const ll M=1e9+7;
ll n;
ll h[100009];
ll w[100009];
int main(){
    cin>>n;
    ll H=0,W=0;
    for(ll i=0 ; i<n ; i++){
        cin>>h[i];
        H=h[i];
    }
    for(ll i=0 ; i<n ; i++){
        cin>>w[i];
        W+=w[i];
        W%=M;
    }
    H%=M;
    W=((W*(W+1))/2)%M;
    H=((H*(H+1))/2)%M;
    cout<<(W*H)%M<<endl;
}

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