제출 #1316133

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1316133		abcd123456	Foehn Phenomena (JOI17_foehn_phenomena)	C++20	100 / 100	66 ms	7292 KiB

foehn_phenomena

#include<bits/stdc++.h>
#define ll long long
#define int long long
#define maxn 500005
#define fi first
#define se second
#define sti string
using namespace std;

ll n,a[maxn],q,S,T;

ll calc(ll Diff){
   if(Diff>0) return -S*Diff;
   else return -T*Diff;
}

ll diff[maxn];

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++) diff[i]=a[i]-a[i-1];
   ll res=0;
   for(int i=1;i<=n;i++) res+=calc(diff[i]);
   while(q--){
      int L,R,x;
      cin>>L>>R>>x;
      if(L>=1 && L<=n){
        res-=calc(diff[L]);
        diff[L]+=x;
        res+=calc(diff[L]);
      }
      R++;
      if(R>=1 && R<=n){
         res-=calc(diff[R]);
         diff[R]-=x;
         res+=calc(diff[R]);
      }
      cout<<res<<'\n';
   }
   return 0;
}

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