Submission #1234945

#	Time	Username	Problem	Language	Result	Execution time	Memory
1234945		hq77	Fancy Fence (CEOI20_fancyfence)	C++20	0 / 100	1 ms	328 KiB

fancyfence

// Source: https://usaco.guide/general/io

#include <bits/stdc++.h>
#include <cctype>
using namespace std;
#define ll long long
const int MOD=1e9+7;
int main() {
	ll n;cin>>n;
    // vector<int>h(n);
    ll sum=0;
    ll h,w;
    for(int i=0;i<n;i++){
        cin>>h;
    }
    for(int i=0;i<n;i++){
        cin>>w;
        sum+=w;
    }
    sum*=(sum+1);sum/=2;
    sum%=MOD;
    h*=(h+1);h/=2;
    h%=MOD;
    ll ans=(h*sum)%MOD;
    
    cout<<ans%MOD;;
}

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