Submission #546093

#	Time	Username	Problem	Language	Result	Execution time	Memory
546093		Hanksburger	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	105 ms	11468 KiB

foehn_phenomena

#include <bits/stdc++.h>
using namespace std;
long long a[200005], diff[200005];
int main()
{
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	long long n, q, s, t, pre, ans=0;
	cin >> n >> q >> s >> t >> pre;
	for (long long i=1; i<=n; i++)
	{
		long long x;
		cin >> x;
		diff[i]=x-pre;
		pre=x;
		if (diff[i]>=0)
			ans-=diff[i]*s;
		else
			ans-=diff[i]*t;
	}
	for (long long i=1; i<=q; i++)
	{
		long long l, r, x;
		cin >> l >> r >> x;
		if (diff[l]>=0)
			ans+=diff[l]*s;
		else
			ans+=diff[l]*t;
		diff[l]+=x;
		if (diff[l]>=0)
			ans-=diff[l]*s;
		else
			ans-=diff[l]*t;
		if (r<n)
		{
			if (diff[r+1]>=0)
				ans+=diff[r+1]*s;
			else
				ans+=diff[r+1]*t;
			diff[r+1]-=x;
			if (diff[r+1]>=0)
				ans-=diff[r+1]*s;
			else
				ans-=diff[r+1]*t;
		}
		cout << ans << '\n';
	}
	return 0;
}

• Subtask 1: 30 / 30
• Subtask 2: 10 / 10
• Subtask 3: 60 / 60