Submission #880371

#	Time	Username	Problem	Language	Result	Execution time	Memory
880371		JakobZorz	Foehn Phenomena (JOI17_foehn_phenomena)	C++14	100 / 100	92 ms	12436 KiB

foehn_phenomena

#include<iostream>
#include<vector>
#include<queue>
#include<stack>
#include<algorithm>
#include<limits.h>
#include<math.h>
#include<map>
#include<set>
#include<unordered_map>
#include<unordered_set>
#include<iomanip>
#include<cstring>
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
using namespace std;
//const int MOD=1e9+7;
//typedef pair<ll,ll>Point;
//typedef pair<ll,ll>Line;
//#define x first
//#define y second

void solve(){
    int n,q,s,t;
    cin>>n>>q>>s>>t;
    vector<int>arr(n+1);
    for(int&i:arr)
        cin>>i;
    vector<ll>diff(n);
    ll res=0;
    for(int i=0;i<n;i++){
        diff[i]=arr[i+1]-arr[i];
        if(diff[i]>0){
            res-=diff[i]*s;
        }else{
            res-=diff[i]*t;
        }
    }
    
    while(q--){
        int l,r,x;
        cin>>l>>r>>x;
        l--;
        //if(l!=-1){
            if(diff[l]>0){
                res+=diff[l]*s;
            }else{
                res+=diff[l]*t;
            }
            diff[l]+=x;
            if(diff[l]>0){
                res-=diff[l]*s;
            }else{
                res-=diff[l]*t;
            }
        //}
        
        if(r!=n){
            if(diff[r]>0){
                res+=diff[r]*s;
            }else{
                res+=diff[r]*t;
            }
            diff[r]-=x;
            if(diff[r]>0){
                res-=diff[r]*s;
            }else{
                res-=diff[r]*t;
            }
        }
        
        cout<<res<<"\n";
    }
}

int main(){
    ios::sync_with_stdio(false);cout.tie(NULL);cin.tie(NULL);
    //freopen("bank.in","r",stdin);freopen("bank.out","w",stdout);
    int t=1;//cin>>t;
    while(t--)solve();
    return 0;
}

/*
 
3 5 1 2
0 4 1 8
1 2 2
1 1 -2
2 3 5
1 2 -1
1 3 5
 
 */

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