Submission #906415

#	Time	Username	Problem	Language	Result	Execution time	Memory
906415		Ludissey	Fancy Fence (CEOI20_fancyfence)	C++14	15 / 100	18 ms	2396 KiB

fancyfence

#include <bits/stdc++.h>
using namespace std;
#define int long long
 
int n,m;
int mod=1e9+7;
int clc(int x) { return (((x*(x+1)))/(long long)2)%mod; }
signed main() {
    ios::sync_with_stdio(false); cin.tie(nullptr);
    cin >> n;
    int H;
    int width=0;
    for (int i = 0; i < n; i++) cin >> H;
    for (int i = 0; i < n; i++) {
        int x; cin >> x;
        width+=x;
        width%=mod;
    }
    int outp=(clc(width%mod)*clc(H%mod));
    outp%=mod;
    cout << outp << "\n";
    return 0;
}

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