Submission #68214

#	Time	Username	Problem	Language	Result	Execution time	Memory
68214		almasalmas	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	797 ms	7628 KiB

foehn_phenomena

#include <bits/stdc++.h>

#define int long long

using namespace std;

int a[200001];
int d[200001];

 main () {
	int n, q, s, t;
	cin >> n >> q >> s >> t;
	for (int i = 0;i <= n;i ++) cin >> a[i];
	int cur = 0;
	for  (int i = 1;i <= n;i ++) {
		int len = abs (a[i] - a[i - 1]);
		if (a[i] > a[i - 1]) {
			cur -= len * s;
		}
		else cur += len * t;
	}
//	cout << cur << endl;
	while (q --) {
		int l, r, x;
		cin >> l >> r >> x;
		if (r != n) {
			int X = a[r];
			a[r] += d[r];
			if (a[r] < a[r + 1]) {
				cur += s * (a[r + 1] - a[r]);
			}
			else cur -= t * (a[r] - a[r + 1]);
			d[r] += x;
			a[r] += x;
			if (a[r] < a[r + 1]) {
				cur -= s * (a[r + 1] - a[r]);
			}
			else cur += t * (a[r] - a[r + 1]);
			a[r] = X;
		}
	//	cout << cur << endl;
		int X = a[l - 1];
		a[l - 1] += d[l - 1];
		if (a[l - 1] < a[l]) {
			cur += s * (a[l] - a[l - 1]);
		}
		else cur -= t * (a[l - 1] - a[l]);
		d[l - 1] -= x;
		a[l - 1] -= x;
		if (a[l - 1] < a[l]) {
			cur -= s * (a[l] - a[l - 1]);
		}
		else cur += t * (a[l - 1] - a[l]);
		a[l - 1] = X;           
		cout << cur << endl;	
	}
	return 0;
}

Compilation message (stderr)

foehn_phenomena.cpp:10:8: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  main () {
        ^

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