Submission #386802

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
386802	2021-04-07T10:45:36 Z	nikatamliani	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++14	100 / 100	31 ms	10220 KB

Main

#include <bits/stdc++.h>
#define ll long long
using namespace std;
const int N = 2e5+10;
ll a[N], s[N], p[N], cost_pref[N], cost_suff[N];
ll n;
int main() {
	ios::sync_with_stdio(0); cin.tie(0);
	cin >> n;
	for(int i = 1; i <= n; ++i) {
		cin >> a[i];
		p[i] = s[i] = a[i];
	}
	ll cnt = 0, cost = 0;
	cost_pref[1] = 0;
	for(int i = 2; i <= n; ++i) {
		p[i] += cnt;
		if(p[i] <= p[i - 1]) {
			cost += p[i - 1] + 1 - p[i];
		}
		cost_pref[i] = cost;
	}
	cnt = cost = 0;
	cost_suff[n] = 0; 
	for(int i = n - 1; i >= 1; --i) {
		s[i] += cnt;
		if(s[i] <= s[i + 1]) {
			cost += s[i + 1] + 1 - s[i];
		}
		cost_suff[i] = cost;
	}
	ll ans = min(cost_suff[1], cost_pref[n]);
	for(int i = 1; i < n; ++i) {
		//i | i + 1
		if(cost_pref[i] == cost_suff[i+1]) {
			ans = min(ans, cost_pref[i] + (p[i] == s[i+1]));
		} else {
			ans = min(ans, max(cost_pref[i], cost_suff[i+1]));
		}
	}
	cout << ans << endl;
}

Subtask #1

40.0 / 40.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	1 ms	364 KB	Output is correct
3	Correct	1 ms	364 KB	Output is correct
4	Correct	1 ms	364 KB	Output is correct
5	Correct	1 ms	492 KB	Output is correct
6	Correct	1 ms	492 KB	Output is correct
7	Correct	1 ms	492 KB	Output is correct
8	Correct	1 ms	492 KB	Output is correct
9	Correct	1 ms	492 KB	Output is correct
10	Correct	1 ms	512 KB	Output is correct
11	Correct	1 ms	492 KB	Output is correct
12	Correct	2 ms	492 KB	Output is correct
13	Correct	1 ms	492 KB	Output is correct
14	Correct	1 ms	512 KB	Output is correct
15	Correct	1 ms	492 KB	Output is correct
16	Correct	1 ms	492 KB	Output is correct
17	Correct	1 ms	492 KB	Output is correct
18	Correct	1 ms	492 KB	Output is correct
19	Correct	1 ms	492 KB	Output is correct
20	Correct	2 ms	512 KB	Output is correct
21	Correct	1 ms	492 KB	Output is correct
22	Correct	1 ms	492 KB	Output is correct
23	Correct	1 ms	492 KB	Output is correct
24	Correct	1 ms	492 KB	Output is correct

Subtask #2

60.0 / 60.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	1 ms	364 KB	Output is correct
3	Correct	1 ms	364 KB	Output is correct
4	Correct	1 ms	364 KB	Output is correct
5	Correct	1 ms	492 KB	Output is correct
6	Correct	1 ms	492 KB	Output is correct
7	Correct	1 ms	492 KB	Output is correct
8	Correct	1 ms	492 KB	Output is correct
9	Correct	1 ms	492 KB	Output is correct
10	Correct	1 ms	512 KB	Output is correct
11	Correct	1 ms	492 KB	Output is correct
12	Correct	2 ms	492 KB	Output is correct
13	Correct	1 ms	492 KB	Output is correct
14	Correct	1 ms	512 KB	Output is correct
15	Correct	1 ms	492 KB	Output is correct
16	Correct	1 ms	492 KB	Output is correct
17	Correct	1 ms	492 KB	Output is correct
18	Correct	1 ms	492 KB	Output is correct
19	Correct	1 ms	492 KB	Output is correct
20	Correct	2 ms	512 KB	Output is correct
21	Correct	1 ms	492 KB	Output is correct
22	Correct	1 ms	492 KB	Output is correct
23	Correct	1 ms	492 KB	Output is correct
24	Correct	1 ms	492 KB	Output is correct
25	Correct	1 ms	492 KB	Output is correct
26	Correct	30 ms	10092 KB	Output is correct
27	Correct	30 ms	10220 KB	Output is correct
28	Correct	28 ms	10092 KB	Output is correct
29	Correct	28 ms	10092 KB	Output is correct
30	Correct	26 ms	9452 KB	Output is correct
31	Correct	28 ms	10092 KB	Output is correct
32	Correct	28 ms	10092 KB	Output is correct
33	Correct	28 ms	10092 KB	Output is correct
34	Correct	28 ms	10092 KB	Output is correct
35	Correct	23 ms	9324 KB	Output is correct
36	Correct	24 ms	9452 KB	Output is correct
37	Correct	24 ms	9452 KB	Output is correct
38	Correct	28 ms	10092 KB	Output is correct
39	Correct	28 ms	10092 KB	Output is correct
40	Correct	29 ms	10092 KB	Output is correct
41	Correct	28 ms	10092 KB	Output is correct
42	Correct	31 ms	9964 KB	Output is correct
43	Correct	28 ms	10092 KB	Output is correct
44	Correct	28 ms	10092 KB	Output is correct
45	Correct	29 ms	10220 KB	Output is correct
46	Correct	28 ms	10092 KB	Output is correct
47	Correct	28 ms	10092 KB	Output is correct
48	Correct	29 ms	10092 KB	Output is correct