Submission #51505

#	Time	Username	Problem	Language	Result	Execution time	Memory
51505		mergesort	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	185 ms	7588 KiB

foehn_phenomena

#include<bits/stdc++.h>

using namespace std;
#define int long long
int a[200005],b[200005];
signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n,q,s,t,ans=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]-a[i-1];
        if(a[i]>a[i-1])ans-=(a[i]-a[i-1])*s;
        else ans-=(a[i]-a[i-1])*t;
    }
    while(q--){
        int l,r,val;
        cin>>l>>r>>val;
        if(r!=n)ans+=b[r+1]*((b[r+1]>0)?s:t);
        if(l)ans+=b[l]*((b[l]>0)?s:t);
        if(r!=n)b[r+1]-=val;
        if(l)b[l]+=val;
        ans-=b[r+1]*((b[r+1]>=0)?s:t);
        ans-=b[l]*((b[l]>=0)?s:t);
        cout<<ans<<'\n';
    }
}

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