Submission #1180945

#	Time	Username	Problem	Language	Result	Execution time	Memory
1180945		boclobanchat	Foehn Phenomena (JOI17_foehn_phenomena)	C++20	100 / 100	62 ms	5704 KiB

foehn_phenomena

#include<bits/stdc++.h>
using namespace std;
const int MAXN=2e5+5;
long long D[MAXN];
long long n,q,s,t,ans=0,pre=0;
void update(int i,long long val)
{
	if(D[i]>=0) ans+=D[i]*s;
	else ans+=D[i]*t;
	D[i]+=val;
	if(D[i]>=0) ans-=D[i]*s;
	else ans-=D[i]*t;
}
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin>>n>>q>>s>>t;
    for(int i=0;i<=n;i++)
    {
    	long long res;
    	cin>>res;
    	if(i) update(i,res-pre);
    	pre=res;
	}
	for(int i=1;i<=q;i++)
	{
		long long l,r,v;
		cin>>l>>r>>v;
		update(l,v);
		if(r+1<=n) update(r+1,-v);
		cout<<ans<<"\n";
	}
}

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