Submission #692573

#	Time	Username	Problem	Language	Result	Execution time	Memory
692573		owoovo	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++14	100 / 100	30 ms	6960 KiB

Main

#include<bits/stdc++.h>
#define ll long long
using namespace std;
ll ori[200010],pre[200010]={},pb[200010]={};
int main(){
    cin.tie(0);
    ios::sync_with_stdio(0);
    ll n;
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>ori[i];
    }
    for(int i=2;i<=n;i++){
        pre[i]=pre[i-1];
        if(ori[i]<=ori[i-1]){
            pre[i]+=ori[i-1]-ori[i]+1;
        }
    }
    for(int i=n;i>=1;i--){
        pb[i]=pb[i+1];
        if(ori[i]<=ori[i+1]){
            pb[i]+=ori[i+1]-ori[i]+1;
        }
    }
    ll ans=100000000000000000;
    for(int i=1;i<=n;i++){
        ans=min(ans,max(pre[i],pb[i]));
    }
    cout<<ans<<"\n";
    return 0;
}

• Subtask 1: 40 / 40
• Subtask 2: 60 / 60