Submission #33257

#	Time	Username	Problem	Language	Result	Execution time	Memory
33257		minkank	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	0 / 100	16 ms	3736 KiB

foehn_phenomena

#include <bits/stdc++.h>
using namespace std;

const int N = 2e5 + 5;

int n, m, s, t;
long long ans = 0, a[N];

int main() {
	ios::sync_with_stdio(false); cin.tie(0);
	cin >> n >> m >> t >> s;
	for(int i = 0; i <= n; ++i) cin >> a[i];
	for(int i = n; i >= 1; --i) {
		a[i] -= a[i - 1];
		if(a[i] > 0) ans -= a[i] * t;
		else ans += -a[i] * s;
	}
	for(int i = 0; i < m; ++i) {
		int l, r, x; cin >> l >> r >> x;
		if(a[l] > 0) ans += a[l] * t;
		else ans -= -a[l] * s;
		a[l] += x;
		if(a[l] > 0) ans -= a[l] * t;
		else ans += -a[l] * s;
		if(r != n) {
			if(a[r + 1] > 0) ans += a[r + 1] * t;
			else ans -= -a[r + 1] * s;
			a[r + 1] -= x; 
			if(a[r + 1] > 0) ans -= a[r + 1] * t;
			else ans += -a[r + 1] * s;
		}
		cout << ans << '\n';
	}
}

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