Submission #1017918

#	Time	Username	Problem	Language	Result	Execution time	Memory
1017918		vjudge1	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	81 ms	7252 KiB

foehn_phenomena

#include <bits/stdc++.h>
#define int long long
using namespace std;
#define boost ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
const int N = 1e6 + 12, mod = 1e16 + 7;
signed main () {
	boost
	int n, q, s, t;
	cin >> n >> q >> s >> t;
	vector<int>v(n + 1);
	for(int i = 0; i <= n; ++i){
		cin >> v[i];
	}
	vector<int>d(n + 1);
	int ans = 0;
	for(int i = 1; i <= n ; ++i){
		d[i] = v[i] - v[i - 1];
		if(d[i] > 0){
			ans -= d[i] * s;
		} else {
			ans -= d[i] * t;
		}
	}
	while(q--){
		int l, r, x;
		cin >> l >> r >> x;
		if(d[l] > 0){
			ans += d[l] * s;
		} else {
			ans += d[l] * t;
		}
		if(r + 1 <= n){
				if(d[r + 1] > 0){
				ans += d[r + 1] * s;
			} else {
				ans += d[r + 1] * t;
			}
		}
		
		d[l] = d[l] + x;
		if(r + 1 <= n){
		d[r + 1] = d[r + 1] - x;
	}
		if(d[l] > 0){
			ans -= d[l] * s;
		} else {
			ans -= d[l] * t;
		}
		if(r + 1 <= n){
			if(d[r + 1] > 0){
				ans -= d[r + 1] * s;
			} else {
				ans -= d[r + 1] * t;
			}
		}
		cout << ans << '\n';
	}
}

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