Submission #373930

#	Time	Username	Problem	Language	Result	Execution time	Memory
373930		achibasadzishvili	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	36 ms	5100 KiB

Main

#include<bits/stdc++.h>
#define ll long long
#define f first
#define s second
#define pb push_back
using namespace std;
ll n,a[200005],pre[200005],suf[200005];
int main(){
    ios::sync_with_stdio(false);
    cin >> n;
    
    for(int i=1; i<=n; i++){
        cin >> a[i];
    }
    for(int i=1; i<=n; i++){
        pre[i] = pre[i - 1];
        if(a[i] <= a[i - 1])
            pre[i] += a[i - 1] - a[i] + 1;
    }
    ll ans = 100000000000000;
    for(int i=n; i>=1; i--){
        suf[i] = suf[i + 1];
        if(a[i] <= a[i + 1])
            suf[i] += a[i + 1] - a[i] + 1;
        ans = min(ans , max(suf[i] , pre[i]));
    }
    
    cout << ans << '\n';
    
    
    
    return 0;
}

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