Submission #832983

#	Time	Username	Problem	Language	Result	Execution time	Memory
832983		Ozy	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	22 ms	6944 KiB

Main

#include <iostream>
#include <bits/stdc++.h>
using namespace std;
#define lli long long int
#define debug(a) cout << #a << " = " << a << endl
#define debugsl(a) cout << #a << " = " << a << ", "
#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 pll pair<lli,lli>

#define MAX 200000

lli arr[MAX+2],izq[MAX+2],der[MAX+2];
lli res,a,n;

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

    cin >> n;
    rep(i,1,n) {
        cin >> arr[i];
        if(i==1) continue;
        der[i] = der[i-1];
        if (arr[i] <= arr[i-1]) der[i] += arr[i-1] - arr[i] + 1;
    }
    res = -1;
    repa(i,n,1){
        if (i < n) {
            izq[i] = izq[i+1];
            if (arr[i+1] >= arr[i]) izq[i] += arr[i+1] - arr[i] + 1;
        }
        a = max(der[i],izq[i]);
        if (res == -1 || a < res) res = a;
    }

    cout << res;

    return 0;
}

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