Submission #354856

#	Time	Username	Problem	Language	Result	Execution time	Memory
354856		SeDunion	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	30 / 100	1092 ms	4588 KiB

foehn_phenomena

#include<bits/stdc++.h>
using namespace std;
using ll = long long;
const int N = 1e6 + 66;

ll a[N], S, T, All;
int n, q;
ll get(int i) {
	if (i >= n || i < 0) return 0;
	if (a[i] < a[i + 1]) {
		return (a[i] - a[i + 1]) * S;
	} else {
		return (a[i] - a[i + 1]) * T;
	}
}

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0), cout.tie(0);
	cin >> n >> q >> S >> T;
	for (int i = 0 ; i <= n ; ++ i) {
		cin >> a[i];
	}
	for (int i = 0 ; i < n ; ++ i) {
		All += get(i);
	}
	while (q--) {
		int l, r; ll x;
		cin >> l >> r >> x;
		All -= get(l-1);
		All -= get(r);
		for (int i = l ; i <= r ; ++ i) {
			a[i] += x;
		}
		All += get(l-1);
		All += get(r);
		cout << All << "\n";
	}
}

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