Submission #441268

#	Time	Username	Problem	Language	Result	Execution time	Memory
441268		aryan12	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	34 ms	6984 KiB

Main

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

mt19937_64 RNG(chrono::steady_clock::now().time_since_epoch().count());

void Solve() {
	int n;
	cin >> n;
	int a[n + 1];
	for(int i = 1; i <= n; i++) {
		cin >> a[i];
	}
	int left[n + 1], right[n + 1];
	right[n] = 0, left[1] = 0;
	for(int i = 2; i <= n; i++) {
		left[i] = left[i - 1] + max(a[i - 1] + 1 - a[i], 0LL);
	}
	for(int i = n - 1; i > 0; i--) {
		right[i] = right[i + 1] + max(a[i + 1] + 1 - a[i], 0LL);
	}
	int ans = min(left[n], right[1]);
	for(int i = 2; i < n; i++) {
		ans = min(ans, max(left[i], right[i]));
	}
	cout << ans << "\n";
}

int32_t main() {
	auto begin = std::chrono::high_resolution_clock::now();
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	int t = 1;
	//cin >> t;
	while(t--) {
		Solve();
	}
	auto end = std::chrono::high_resolution_clock::now();
    auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin);
    cerr << "Time measured: " << elapsed.count() * 1e-9 << " seconds.\n"; 
	return 0;
}

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