Submission #921382

#	Time	Username	Problem	Language	Result	Execution time	Memory
921382		TAhmed33	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++98	100 / 100	21 ms	7248 KiB

Main

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int MAXN = 2e5 + 25;
ll a[MAXN], n, pref[MAXN], suff[MAXN];
int main () {
	ios::sync_with_stdio(0); cin.tie(0);
	cin >> n; ll x;
	for (int i = 1; i <= n; i++) {
		ll y; cin >> y;
		a[i] = y - x; x = y;
	}
	///for (int i = 2; i <= n; i++) cout << a[i] << " ";
	//cout << '\n';
	for (int i = 2; i <= n; i++) {
		pref[i] = max(0ll, 1 - a[i]) + pref[i - 1];
	}
	for (int i = n; i >= 2; i--) {
		suff[i] = max(0ll, a[i] + 1) + suff[i + 1];
	}
	ll mn = suff[2];
	for (int i = 2; i <= n; i++) {
		mn = min(mn, max(pref[i], suff[i + 1]));
	}
	cout << mn << '\n';
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:11:12: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
   11 |   a[i] = y - x; x = y;
      |          ~~^~~

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