Submission #315929

#	Time	Username	Problem	Language	Result	Execution time	Memory
315929		jjj	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	30 / 100	1002 ms	11640 KiB

foehn_phenomena

#include <iostream>

using namespace std;

long long a[200010], b[200010];

int main()
{
	int n, q;
	long long s, t, v = 0;
	
	cin >> n >> q >> s >> t;
	
	for(int i = 0; i <= n; i++) cin >> a[i];
	
	for(int i = 1; i <= n; i++)
		b[i] = a[i] - a[i - 1];
		
	for(int i = 1; i <= n; i++)
	{
		if(b[i] > 0) v -= s * b[i];
		else v -= t * b[i];
	}
	
	while(q--)
	{
		int l, r;
		long long x;
		
		cin >> l >> r >> x;
		
		if(b[l] > 0) v += s * b[l];
		else v += t * b[l];
		
		b[l] += x;
		
		if(b[l] > 0) v -= s * b[l];
		else v -= t * b[l];
		
		if(r != n)
		{
			if(b[r + 1] > 0) v += s * b[r + 1];
			else v += t * b[r + 1];
		
			b[r + 1] -= x;
		
			if(b[r + 1] > 0) v -= s * b[r + 1];
			else v -= t * b[r + 1];
		}
		
		cout << v << "\n";
	}
	
	return 0;
}

• Subtask 1: 30 / 30
• Subtask 2: 0 / 10
• Subtask 3: 0 / 60