Submission #522244

#	Time	Username	Problem	Language	Result	Execution time	Memory
522244		AdamGS	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	26 ms	6988 KiB

Main

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
#define rep(a, b) for(int a = 0; a < (b); ++a)
#define st first
#define nd second
#define pb push_back
#define all(a) a.begin(), a.end()
const int LIM=2e5+7;
const ll INF=1e18+7;
ll T[LIM], pref[LIM], suf[LIM];
int main() {
	ios_base::sync_with_stdio(0); cin.tie(0);
	int n;
	cin >> n;
	rep(i, n) cin >> T[i];
	for(int i=1; i<n; ++i) {
		pref[i]=pref[i-1];
		if(T[i-1]>=T[i]) pref[i]+=T[i-1]-T[i]+1;
	}
	for(int i=n-2; i>=0; --i) {
		suf[i]=suf[i+1];
		if(T[i+1]>=T[i]) suf[i]+=T[i+1]-T[i]+1;
	}
	ll ans=INF;
	rep(i, n) ans=min(ans, max(pref[i], suf[i]));
	cout << ans << '\n';
}

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