Submission #1292216

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Source Code Expand

#include<iostream>
using namespace std;
#define int long long
#define mod 1000000007
int na[114514], ma[114514];
signed main() {
	int n, m;
	cin >> n >> m;
	for (int i = 0; i < n; i++)cin >> na[i];
	for (int i = 0; i < m; i++)cin >> ma[i];
	int sx = 0, sy = 0;
	for (int i = 1; i <= n; i++) {
		sx += ((i-1)*na[i-1] - (n - i)*na[i-1]);
		sx %= mod;
	}
	for (int i = 1; i <= m; i++) {
		sy += ((i-1)*ma[i - 1] - (m - i)*ma[i - 1]);
		sy %= mod;
	}
	cout << sx*sy%mod << endl;
	return 0;
}

Submission Info

Judge Result