Submission #129282

#	Time	Username	Problem	Language	Result	Execution time	Memory
129282		gaoxam123	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	151 ms	7300 KiB

foehn_phenomena

#include<bits/stdc++.h>
using namespace std;
#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
#define int long long
int n,q,s,t,res;
int a[200005],b[200005];
signed 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=1;i<=n;i++){
		b[i]=a[i-1]-a[i];
		if(b[i]<0) res+=b[i]*s;
		else res+=b[i]*t;
	}
	while(q--){
		int l,r,x;
		cin>>l>>r>>x;
		if(b[l]<0) res-=b[l]*s;
		else res-=b[l]*t;
		b[l]-=x;
		if(b[l]<0) res+=b[l]*s;
		else res+=b[l]*t;
		if(r<n){
			if(b[r+1]<0) res-=b[r+1]*s;
			else res-=b[r+1]*t;
			b[r+1]+=x;
			if(b[r+1]<0) res+=b[r+1]*s;
			else res+=b[r+1]*t;
		}
		cout<<res<<"\n";
	}
}

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