Submission #886771

#	Time	Username	Problem	Language	Result	Execution time	Memory
886771		Maite_Morale	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	99 ms	15828 KiB

foehn_phenomena

#include<bits/stdc++.h>
#define F first
#define S second
#define MAX 500005
#define oo 1e18
#define mod 1000000007
#define fast_in ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);cout.setf(ios::fixed);cout.precision(0);
using namespace std;
typedef long long ll;
#define pll pair<ll , ll>
#define vll vector<ll>
#define vvll vector<vll>
#define vpll vector<pll>
 
ll t,n,a[MAX],s,q,k,p,f;
int main(){
    fast_in
    cin>>n>>q>>s>>t;vpll v;ll r=0;
    for(int i=0;i<=n;i++){
        cin>>a[i];
        if(i!=0){
            v.push_back({a[i-1],a[i]});
            if(a[i]-a[i-1]>0)r+=(a[i]-a[i-1])*-s;
            else             r+=(a[i]-a[i-1])*-t;
        }
    }
    for(int i=0;i<q;i++){
        cin>>p>>f>>k;
        if(p>0){
            if(v[p-1].S-v[p-1].F>0)r-=(v[p-1].S-v[p-1].F)*-s;
            else                   r-=(v[p-1].S-v[p-1].F)*-t;
            v[p-1].S+=k;
            if(v[p-1].S-v[p-1].F>0)r+=(v[p-1].S-v[p-1].F)*-s;
            else                   r+=(v[p-1].S-v[p-1].F)*-t;
        }
        if(f<n){
            if(v[f].S-v[f].F>0)r-=(v[f].S-v[f].F)*-s;
            else               r-=(v[f].S-v[f].F)*-t;
            v[f].F+=k;
            if(v[f].S-v[f].F>0)r+=(v[f].S-v[f].F)*-s;
            else               r+=(v[f].S-v[f].F)*-t;
        }
        cout<<r<<"\n";
    }

    
return 0;
}

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