제출 #830457

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
830457		Warinchai	Fancy Fence (CEOI20_fancyfence)	C++14	0 / 100	1 ms	340 KiB

fancyfence

#include<bits/stdc++.h>
using namespace std;
long long h[200005];
long long w[200005];
long long md=1e9+7;
struct block{
    long long h,w;
    block(long long hh=0,long long ww=0){
        h=hh;
        w=ww;
    }
};
long long calc(block x){
    long long ans=x.h*(x.h+1)/2;
    ans%=md;
    long long ans1=x.w*(x.w+1)/2;
    ans1%=md;
    long long ans2=(ans*ans1)%md;
    return ans2;
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int n;
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>h[i];
    }
    long long aw=0;
    for(int i=1;i<=n;i++){
        cin>>w[i];
        aw+=w[i];
    }
    cout<<calc(block(h[1],aw));
    
}

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