Submission #667243

#	Time	Username	Problem	Language	Result	Execution time	Memory
667243		Ahmed57	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	120 ms	11492 KiB

foehn_phenomena

#include<bits/stdc++.h>
using namespace std;

int main(){
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    long long n,q,s,t;
    cin>>n>>q>>s>>t;
    long long diff[n];
    long long x;cin>>x;long long ans = 0;
    for(int i = 0;i<n;i++){
        long long y ;cin>>y;
        diff[i] = y-x;
        if(diff[i]>=0){
            ans-=s*diff[i];
        }else ans+=t*(abs(diff[i]));
        x = y;
    }
    while(q--){
        long long l, r , x;
        cin>>l>>r>>x;
        if(l-1>=0){
        if(diff[l-1]>=0){
            ans+=s*diff[l-1];
        }else ans-=t*(abs(diff[l-1]));
        diff[l-1]+=x;
        if(diff[l-1]>=0){
            ans-=s*diff[l-1];
        }else ans+=t*(abs(diff[l-1]));
        }if(r<n){
        if(diff[r]>=0){
            ans+=s*diff[r];
        }else ans-=t*(abs(diff[r]));
        diff[r]-=x;
        if(diff[r]>=0){
            ans-=s*diff[r];
        }else ans+=t*(abs(diff[r]));
        }
        cout<<ans<<"\n";
    }
}

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