Submission #580206

#	Time	Username	Problem	Language	Result	Execution time	Memory
580206		MODDI	Fancy Fence (CEOI20_fancyfence)	C++14	13 / 100	69 ms	3616 KiB

fancyfence

#include <bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
#define pll pair<ll,ll>
#define vi vector<int>
#define vl vector<ll>
#define mp make_pair
#define pb push_back
using namespace std;
const int MOD = 1e9 + 7;
int main(){
	int n;
	cin>>n;
	vl visina, sirina;
	for(int i = 0; i < n; i++){
		ll a;
		cin>>a;
		visina.pb(a);
	}
	for(int i = 0; i < n; i++){
		ll a;
		cin>>a;
		sirina.pb(a);
	}
	ll rez = 0, cur = 0, sum = 0;
	for(int i = 0; i < n; i++){
		sum += sirina[i];
		sum %= MOD;
		if(visina[i] == 2)
		{
			cur += sirina[i];
			cur %= MOD;
		}
		else{
			if(cur > 0){
				rez += cur * (cur + 1);
				rez %= MOD;
				cur = 0;
			}
		}
	}
	if(cur > 0){
		rez += cur * (cur + 1);
		rez %= MOD;
	}
	rez += sum * (sum + 1) / 2;
	rez %= MOD;
	cout<<rez<<endl;
}

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