Submission #444973

#	Time	Username	Problem	Language	Result	Execution time	Memory
444973		fuad27	Fancy Fence (CEOI20_fancyfence)	C++14	0 / 100	1 ms	204 KiB

fancyfence

#include<bits/stdc++.h>
using namespace std;
#define mod 1000000007
int main () {
	long long n, a = 0;
	cin >> n;
	long long sumW = 0, r = 0;
	for(int i = 0;i<n;i++) {
		long long W;
		cin >> W;
		a = W;
	}
	for(int i = 0;i<n;i++) {
		long long p;
		cin >> p;
		sumW += p;
		sumW%=mod;
	}
	a%=mod;
	sumW%=mod;
	a*=(a+1);
	a%=mod;
	sumW*=(sumW+1);
	sumW%=mod;
	cout<<(a/2)*(sumW/2)<<endl;
}

Compilation message (stderr)

fancyfence.cpp: In function 'int main()':
fancyfence.cpp:7:22: warning: unused variable 'r' [-Wunused-variable]
    7 |  long long sumW = 0, r = 0;
      |                      ^

• 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