Submission #896382

#	Time	Username	Problem	Language	Result	Execution time	Memory
896382		goodspeed0208	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	487 ms	13180 KiB

foehn_phenomena

#include<iostream>
#include<vector>
#include<algorithm>
#include<set>
#include<map>
#include<utility>
#define int long long
#define INF 1000000000000000000
using namespace std;

signed main() {
	int n, q, s, t;
	cin >> n >> q >> s >> t;
	vector<int>v(n+5), dif(n+5);
	for (int i = 0 ; i <= n ; i++) cin >> v[i];
	int ans = 0;
	for (int i = 0 ; i < n ; i++) {
		dif[i] = v[i+1] - v[i];
		if (dif[i] > 0) ans -= s * dif[i];
		else ans += t * (-dif[i]);
	}
	//cout << ans << "\n";
	int l, r, x;
	while (q--) {
		cin >> l >> r >> x;
		if (dif[l-1] > 0) ans += s * dif[l-1];
		else ans -= t * -(dif[l-1]);
		dif[l-1] += x;
		if (dif[l-1] > 0) ans -= s * dif[l-1];
		else ans += t * -(dif[l-1]);
		
		if (r != n) {
			if (dif[r] > 0) ans += s * dif[r];
			else ans -= t * -(dif[r]);
			dif[r] -= x;
			if (dif[r] > 0) ans -= s * dif[r];
			else ans += t * -(dif[r]);
		} 
			
		
		cout << ans << "\n";
	}
	
}

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