oj.uz

Submission #284355

# Submission time Handle Problem Language Result Execution time Memory
284355 2020-08-27T09:13:24 Z shivensinha4 K blocks (IZhO14_blocks) C++17
100 / 100
 640 ms 5496 KB 
#include <bits/stdc++.h> 
using namespace std; 
#define for_(i, s, e) for (int i = s; i < (int) e; i++)
#define for__(i, s, e) for (ll i = s; i < e; i++)
typedef long long ll;
typedef vector<int> vi;
typedef pair<int, int> ii;
#define endl '\n'


int main() {
	#ifndef ONLINE_JUDGE
	//freopen("test.in", "r", stdin);
	#endif
	
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	
	int n, k; cin >> n >> k;
	vector<ll> nums(n);
	for_(i, 0, n) cin >> nums[i];
	vector<ll> prev(n), curr(n, 1e15);
	prev[n-1] = nums[n-1];
	for (int i = n-2; i >= 0; i--) prev[i] = max(nums[i], prev[i+1]);
	for_(l, 1, k) {
		stack<vector<ll>> s; // {max val index, min prev val till next max}
		//curr[n-l-1] = nums[n-l-1] + prev[n-l];
		//s.push({n-l-1, prev[n-l]});
		for (int i = n-2; i >= 0; i--) {
			ll mn = prev[i+1], ans = prev[i+1]+nums[i];
			while (s.size()) {
				if (nums[s.top()[0]] <= nums[i]) {
					mn = min(mn, s.top()[1]);
					s.pop();
				} else {
					ans = min(ans, curr[s.top()[0]]);
					break;
				}
			}
			
			s.push({i, mn});
			curr[i] = min(ans, nums[i] + mn);
		}
		swap(prev, curr);
		curr.assign(n, 1e15);
	}
	
	cout << prev[0] << endl;
	
	return 0;
}

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 0 ms 384 KB Output is correct
11 Correct 0 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 0 ms 384 KB Output is correct
16 Correct 0 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 0 ms 384 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 1 ms 512 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 0 ms 384 KB Output is correct
14 Correct 0 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 0 ms 384 KB Output is correct
17 Correct 0 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 0 ms 384 KB Output is correct
20 Correct 0 ms 384 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 388 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 0 ms 384 KB Output is correct
11 Correct 1 ms 512 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct

Subtask #4
47.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 768 KB Output is correct
2 Correct 5 ms 1536 KB Output is correct
3 Correct 22 ms 2304 KB Output is correct
4 Correct 216 ms 2304 KB Output is correct
5 Correct 640 ms 4884 KB Output is correct
6 Correct 25 ms 4728 KB Output is correct
7 Correct 294 ms 5496 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 52 ms 640 KB Output is correct
15 Correct 3 ms 640 KB Output is correct
16 Correct 15 ms 640 KB Output is correct
17 Correct 6 ms 1664 KB Output is correct
18 Correct 19 ms 1664 KB Output is correct
19 Correct 178 ms 1756 KB Output is correct
20 Correct 518 ms 3328 KB Output is correct
21 Correct 22 ms 3456 KB Output is correct
22 Correct 237 ms 3328 KB Output is correct
23 Correct 12 ms 3456 KB Output is correct
24 Correct 58 ms 3448 KB Output is correct
25 Correct 523 ms 3576 KB Output is correct
26 Correct 1 ms 384 KB Output is correct
27 Correct 1 ms 384 KB Output is correct
28 Correct 48 ms 640 KB Output is correct
29 Correct 2 ms 640 KB Output is correct
30 Correct 13 ms 640 KB Output is correct
31 Correct 5 ms 1664 KB Output is correct
32 Correct 18 ms 1792 KB Output is correct
33 Correct 173 ms 1664 KB Output is correct
34 Correct 481 ms 3328 KB Output is correct
35 Correct 21 ms 3456 KB Output is correct
36 Correct 217 ms 3456 KB Output is correct
37 Correct 2 ms 768 KB Output is correct
38 Correct 74 ms 832 KB Output is correct
39 Correct 1 ms 384 KB Output is correct
40 Correct 1 ms 384 KB Output is correct
41 Correct 1 ms 384 KB Output is correct
42 Correct 0 ms 384 KB Output is correct