Submission #644916

#	Time	Username	Problem	Language	Result	Execution time	Memory
644916		kdn5549	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	25 ms	6944 KiB

Main

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int,int> pi;
typedef pair<ll,ll> pl;

#define eb emplace_back
#define all(v) v.begin(),v.end()
#define ff first
#define ss second

const ll mxn=2e5+5;
ll a[mxn],l[mxn],r[mxn];

int main()
{
    ios::sync_with_stdio(0); cin.tie(0);
    ll n; cin>>n;
    for (int i=1;i<=n;i++) cin>>a[i];
    for (int i=1;i<=n;i++) l[i]=l[i-1]+max(a[i-1]-a[i]+1,0ll);
    for (int i=n;i>=1;i--) r[i]=r[i+1]+max(a[i+1]-a[i]+1,0ll);
    ll rt=LLONG_MAX;
    for (int i=1;i<=n;i++) rt=min(rt,max(l[i],r[i]));
    cout<<rt;
}

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