Submission #162313

#	Time	Username	Problem	Language	Result	Execution time	Memory
162313		nvmdava	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	305 ms	6340 KiB

foehn_phenomena

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

long long a[200005], s, t, T, x, n, q, l, r;
long long f(long long x){
	return (x > 0 ? s : t) * -x;
}
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 = n; i > 0; i--){
    	a[i] -= a[i - 1];
    	T += (a[i] > 0 ? s : t) * -a[i];
    }


    while(q--){
    	cin>>l>>r>>x;
    	++r;
    	T -= f(a[l]);
    	a[l] += x;
    	T += f(a[l]);
    	if(r <= n){
    		T -= f(a[r]);
    		a[r] -= x;
    		T += f(a[r]);
    	}
    	cout<<T<<'\n';
    }
}

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