Submission #412976

#	Time	Username	Problem	Language	Result	Execution time	Memory
412976		Ozy	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	31 ms	5060 KiB

Main

#include <iostream>
#include <bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for (int i = (a); i <= (b); i++)
#define repa(i,a,b) for (int i = (a); i >= (b); i--)
#define lli long long int
#define debugsl(a) cout << #a << " = " << a << ", "
#define debug(a) cout << #a << " = " << a << endl

#define MAX 200000

 lli n,a,res;
 lli arr[MAX+2];
 lli pref[MAX+2],suf[MAX+2];

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    cin >> n;
    rep(i,1,n) cin >> arr[i];

    //prefijo
    rep(i,2,n) {
        if (arr[i-1] >= arr[i]) pref[i] = arr[i-1] - arr[i] + 1;
        pref[i] += pref[i-1];
    }

    //prefijo
    repa(i,n-1,1) {
        if (arr[i+1] >= arr[i]) suf[i] = arr[i+1] - arr[i] + 1;
        suf[i] += suf[i+1];
    }

    res = 1ll<<62;
    rep(i,1,n) {
        a = max(pref[i], suf[i]);
        res = min(res,a);
    }
    cout << res;

}

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