Submission #129278

#	Time	Username	Problem	Language	Result	Execution time	Memory
129278		tuanasanh	Foehn Phenomena (JOI17_foehn_phenomena)	C++11	100 / 100	162 ms	13304 KiB

foehn_phenomena

#include<bits/stdc++.h>
#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
#define int long long
using namespace std;
const int N=2e5+50;
int n,q,s,t,ans=0,l,r,k;
int a[N],dif[N];
int provjp(int x){
	if(x>0) return -s*x;
	else return -t*x;
}
signed main(){
//	freopen(".inp","r",stdin);
//	freopen(".out","w",stdout);
	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];
		dif[i]=a[i]-a[i-1];
		if(i>0) ans+=provjp(dif[i]);
	}
	while(q--){
		cin>>l>>r>>k;
		ans-=provjp(dif[l]);
		dif[l]+=k;
		ans+=provjp(dif[l]);
		if(r<n){
			ans-=provjp(dif[r+1]);
			dif[r+1]-=k;
			ans+=provjp(dif[r+1]);
		}
		cout<<ans<<"\n";
	}
}

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