Submission #1031695

#	Time	Username	Problem	Language	Result	Execution time	Memory
1031695		juicy	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	73 ms	13136 KiB

foehn_phenomena

#include <bits/stdc++.h>

using namespace std;

#ifdef LOCAL
#include "debug.h"
#else
#define debug(...) 42
#endif

int main() {
	ios::sync_with_stdio(false); cin.tie(nullptr);

	int N, Q, S, T; cin >> N >> Q >> S >> T;
	vector<long long> A(N + 1), dif(N);
	for (int i = 0; i <= N; ++i) {
		cin >> A[i];
	}
	long long res = 0;
	for (int i = 0; i < N; ++i) {
		dif[i] = A[i] - A[i + 1];
		res += (long long) abs(dif[i]) * (dif[i] >= 0 ? T : -S);
	}
	auto upd = [&](int i, int x) {
		res -= (long long) abs(dif[i]) * (dif[i] >= 0 ? T : -S);
		dif[i] += x;
		res += (long long) abs(dif[i]) * (dif[i] >= 0 ? T : -S);
	};
	while (Q--) {
		int l, r, x; cin >> l >> r >> x;
		upd(l - 1, -x);
		if (r < N) {
			upd(r, x);
		}
		cout << res << "\n";
	}
	return 0;
}

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