Submission #1077316

#	Time	Username	Problem	Language	Result	Execution time	Memory
1077316		quangminh412	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++14	100 / 100	23 ms	7080 KiB

Main

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

/*
  John Watson
  https://codeforces.com/profile/quangminh98

  Mua Code nhu mua Florentino !!
*/

#define faster() ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define ll long long

const int maxn = 2e5 + 9;
const ll oo = 1e18;

int n;
int a[maxn];
int b[maxn];
ll pre[maxn], suff[maxn];

signed main()
{
	if (fopen("test.inp", "r"))
	{
		freopen("test.inp", "r", stdin);
		freopen("test.out", "w", stdout);
	}
	faster();

	cin >> n;
	for (int i = 1; i <= n; i++) 
	{
		cin >> a[i];
		b[i] = a[i]	- a[i - 1];
	}
	
	for (int i = 1; i <= n; i++)
	{
		pre[i] = pre[i - 1] + max(0, 1 - b[i]);
		suff[n - i + 1] = suff[n - i + 2] + max(0, 1 + b[n - i + 1]);
	}
	
	ll res = 1e18;
	for (int i = 1; i <= n; i++) 
		res = min(res, max(pre[i], suff[i + 1]));
		
	cout << res << '\n';

	return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:26:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |   freopen("test.inp", "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:27:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |   freopen("test.out", "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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