Submission #976656

#	Time	Username	Problem	Language	Result	Execution time	Memory
976656		irmuun	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	30 ms	7256 KiB

Main

#include<bits/stdc++.h>

using namespace std;

#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    ll n;
    cin>>n;
    ll a[n+5];
    for(ll i=1;i<=n;i++){
        cin>>a[i];
    }
    ll pre[n+5],suf[n+5];
    pre[1]=0;
    suf[n]=0;
    for(ll i=2;i<=n;i++){
        pre[i]=pre[i-1];
        if(a[i-1]>=a[i]){
            pre[i]+=a[i-1]-a[i]+1;
        }
    }
    for(ll i=n-1;i>=1;i--){
        suf[i]=suf[i+1];
        if(a[i+1]>=a[i]){
            suf[i]+=a[i+1]-a[i]+1;
        }
    }
    ll ans=1e18;
    for(ll i=1;i<=n;i++){
        ans=min(ans,max(pre[i],suf[i]));
    }
    cout<<ans;
}

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