Submission #162316

#	Time	Username	Problem	Language	Result	Execution time	Memory
162316		nvmdava	Foehn Phenomena (JOI17_foehn_phenomena)	C++17	100 / 100	275 ms	9720 KiB

foehn_phenomena

#include <bits/stdc++.h>
#pragma GCC optimize("unroll-loops,-O3")
#pragma GCC target("avx,avx2")
using namespace std;
 
long long a[200005], s, t, T, x;
int n, q, l, r;
 
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];
    	a[i] = -a[i];
    	T += (a[i] < 0 ? s : t) * a[i];
    }
 
 
    while(q--){
    	cin>>l>>r>>x;
    	++r;
    	T -= (a[l] < 0 ? s : t) * a[l];
    	a[l] -= x;
    	T += (a[l] < 0 ? s : t) * a[l];
    	if(r <= n){
    		T -= (a[r] < 0 ? s : t) * a[r];
    		a[r] += x;
    		T += (a[r] < 0 ? s : t) * a[r];
    	}
    	cout<<T<<'\n';
    }
}

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