Submission #444993

#	Time	Username	Problem	Language	Result	Execution time	Memory
444993		fuad27	Fancy Fence (CEOI20_fancyfence)	C++14	0 / 100	1085 ms	204 KiB

fancyfence

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define mod 1000000007
int M(int a, int b) {
	a%=mod;
	b%=mod;
	int sum = 0;
	for(int i = 0;i<b;i++) {
		sum+=a;
		sum%=mod;
	}
	return sum;
}
int32_t main () {
	int n, m;
	cin >> n;
	int sumW = 0;
	for(int i = 0;i<n;i++) {
		int h;
		cin >> h;
		m = h;
		m%=mod;
	}
	for(int i = 0;i<n;i++) {
		int w;
		cin >> w;
		sumW += w%mod;
		sumW%=mod;
	}
	cout<<M(M(sumW%mod, (sumW+1)%mod), M(m%mod, (m+1)%mod))/4<<"\n";
}

Compilation message (stderr)

fancyfence.cpp: In function 'int32_t main()':
fancyfence.cpp:31:48: warning: 'm' may be used uninitialized in this function [-Wmaybe-uninitialized]
   31 |  cout<<M(M(sumW%mod, (sumW+1)%mod), M(m%mod, (m+1)%mod))/4<<"\n";
      |                                              ~~^~~

• 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