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Submission #102140

# Submission time Handle Problem Language Result Execution time Memory
102140 2019-03-22T18:35:24 Z MohamedAhmed0 K blocks (IZhO14_blocks) C++14
100 / 100
 973 ms 80848 KB 
#include <bits/stdc++.h>

using namespace std ;

int main()
{
	int n , k ;
	scanf("%d %d" , &n , &k) ;
	int arr[n+1] ;
	for(int i = 1 ; i <= n ; ++i)
		scanf("%d" , &arr[i]) ;
	int dp[n+1][k+1] ;
	int chosen[n+1][k+1] ;
	dp[0][1] = 0 ;
	for(int i = 1 ; i <= n ; ++i)
		dp[i][1] = max(arr[i] , dp[i-1][1]) , chosen[i][1] = dp[i][1];
	for(int j = 2 ; j <= k ; ++j)
	{
		stack<int>s ;
		for(int i = j ; i <= n ; ++i)
		{
			dp[i][j] = dp[i-1][j-1] + arr[i] ;
			chosen[i][j] = arr[i] ;
			while(s.size() > 0)
			{
				int idx = s.top() ;
				if(arr[idx] <= arr[i])
				{
					if(dp[idx][j] - chosen[idx][j] + max(chosen[idx][j] , arr[i]) < dp[i][j])
					{
						dp[i][j] = dp[idx][j] - chosen[idx][j] + max(chosen[idx][j] , arr[i]) ;
					}
					s.pop() ;
				}
				else
					break ;
			}
			if(s.size() > 0)
			{
				int idx = s.top() ;
				if(dp[idx][j] < dp[i][j])
				{
					dp[i][j] = dp[idx][j] ;
                    chosen[i][j] = chosen[idx][j] ;
				}
			}
			s.push(i) ;
		}
	}
	printf("%d" , dp[n][k]) ;
	return 0 ;
}

Compilation message

blocks.cpp: In function 'int main()':
blocks.cpp:8:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d" , &n , &k) ;
  ~~~~~^~~~~~~~~~~~~~~~~~~
blocks.cpp:11:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d" , &arr[i]) ;
   ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 3 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 3 ms 384 KB Output is correct
9 Correct 3 ms 384 KB Output is correct
10 Correct 2 ms 256 KB Output is correct
11 Correct 3 ms 384 KB Output is correct
12 Correct 3 ms 384 KB Output is correct
13 Correct 2 ms 384 KB Output is correct
14 Correct 2 ms 384 KB Output is correct
15 Correct 2 ms 384 KB Output is correct
16 Correct 2 ms 384 KB Output is correct
17 Correct 3 ms 384 KB Output is correct
18 Correct 3 ms 384 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 256 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 256 KB Output is correct
13 Correct 2 ms 256 KB Output is correct
14 Correct 3 ms 256 KB Output is correct
15 Correct 2 ms 256 KB Output is correct
16 Correct 3 ms 256 KB Output is correct
17 Correct 3 ms 300 KB Output is correct
18 Correct 2 ms 256 KB Output is correct
19 Correct 4 ms 320 KB Output is correct
20 Correct 2 ms 256 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 2 ms 296 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 2 ms 304 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 2 ms 256 KB Output is correct
11 Correct 3 ms 256 KB Output is correct
12 Correct 2 ms 256 KB Output is correct
13 Correct 2 ms 384 KB Output is correct
14 Correct 2 ms 384 KB Output is correct
15 Correct 2 ms 384 KB Output is correct
16 Correct 2 ms 384 KB Output is correct
17 Correct 3 ms 384 KB Output is correct
18 Correct 2 ms 384 KB Output is correct
19 Correct 2 ms 384 KB Output is correct

Subtask #4
47.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 2432 KB Output is correct
2 Correct 8 ms 1152 KB Output is correct
3 Correct 14 ms 3200 KB Output is correct
4 Correct 225 ms 27316 KB Output is correct
5 Correct 815 ms 79848 KB Output is correct
6 Correct 43 ms 3832 KB Output is correct
7 Correct 300 ms 36748 KB Output is correct
8 Correct 2 ms 336 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 2 ms 432 KB Output is correct
12 Correct 3 ms 384 KB Output is correct
13 Correct 2 ms 384 KB Output is correct
14 Correct 46 ms 8320 KB Output is correct
15 Correct 4 ms 640 KB Output is correct
16 Correct 15 ms 2432 KB Output is correct
17 Correct 9 ms 1204 KB Output is correct
18 Correct 22 ms 3324 KB Output is correct
19 Correct 267 ms 27356 KB Output is correct
20 Correct 973 ms 79808 KB Output is correct
21 Correct 26 ms 4480 KB Output is correct
22 Correct 285 ms 37368 KB Output is correct
23 Correct 17 ms 2944 KB Output is correct
24 Correct 45 ms 9984 KB Output is correct
25 Correct 833 ms 80504 KB Output is correct
26 Correct 2 ms 384 KB Output is correct
27 Correct 3 ms 384 KB Output is correct
28 Correct 34 ms 8320 KB Output is correct
29 Correct 5 ms 640 KB Output is correct
30 Correct 8 ms 2432 KB Output is correct
31 Correct 9 ms 1536 KB Output is correct
32 Correct 14 ms 3584 KB Output is correct
33 Correct 215 ms 27648 KB Output is correct
34 Correct 867 ms 80848 KB Output is correct
35 Correct 25 ms 4716 KB Output is correct
36 Correct 308 ms 37636 KB Output is correct
37 Correct 5 ms 640 KB Output is correct
38 Correct 45 ms 8320 KB Output is correct
39 Correct 3 ms 380 KB Output is correct
40 Correct 2 ms 384 KB Output is correct
41 Correct 2 ms 256 KB Output is correct
42 Correct 3 ms 256 KB Output is correct