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Submission #218801

# Submission time Handle Problem Language Result Execution time Memory
218801 2020-04-02T18:29:13 Z Lawliet Bigger segments (IZhO19_segments) C++14
37 / 100
 112 ms 38904 KB 
#include <bits/stdc++.h>

using namespace std;
typedef long long int lli;

const int MAXN = 5010;

int n;

int v[MAXN];
int curMx[MAXN];
int dp[MAXN][MAXN];

lli sv[MAXN];

int main()
{
	scanf("%d",&n);

	for(int i = 1 ; i <= n ; i++)
		scanf("%d",&v[i]);

	for(int i = 1 ; i <= n ; i++)
		sv[i] = sv[i - 1] + v[i];

	for(int i = 1 ; i <= n ; i++)
		dp[n + 1][i] = 1;

	for(int i = n ; i > 0 ; i--)
	{
		int p = i;

		for(int j = n ; j >= i ; j--)
		{
			curMx[j] = curMx[j + 1];
			curMx[j] = max( curMx[j] , dp[j + 1][i] );
		}

		for(int j = i - 1 ; j >= 0 ; j--)
		{
			lli lastSum = sv[i - 1] - sv[j - 1];

			while( p <= n && sv[p] - sv[i - 1] < lastSum )
				p++;

			dp[i][j] = curMx[p] + 1;
		}
	}

	int ans = 0;

	for(int i = 1 ; i <= n ; i++)
		ans = max( ans , dp[i + 1][1] );

	printf("%d\n",ans);
}

Compilation message

segments.cpp: In function 'int main()':
segments.cpp:18:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
  ~~~~~^~~~~~~~~
segments.cpp:21:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&v[i]);
   ~~~~~^~~~~~~~~~~~

Subtask #1
13.0 / 13.0

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

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 512 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 4 ms 512 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 4 ms 384 KB Output is correct
10 Correct 5 ms 512 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 5 ms 512 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 4 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 7 ms 2816 KB Output is correct
17 Correct 6 ms 2816 KB Output is correct
18 Correct 7 ms 2944 KB Output is correct
19 Correct 6 ms 2816 KB Output is correct
20 Correct 7 ms 2816 KB Output is correct
21 Correct 7 ms 2816 KB Output is correct
22 Correct 6 ms 2304 KB Output is correct
23 Correct 6 ms 1792 KB Output is correct
24 Correct 7 ms 2816 KB Output is correct
25 Correct 6 ms 2816 KB Output is correct
26 Correct 6 ms 2816 KB Output is correct
27 Correct 6 ms 2816 KB Output is correct
28 Correct 7 ms 2816 KB Output is correct
29 Correct 7 ms 2816 KB Output is correct
30 Correct 7 ms 2816 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 512 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 4 ms 512 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 4 ms 384 KB Output is correct
10 Correct 5 ms 512 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 5 ms 512 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 4 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 7 ms 2816 KB Output is correct
17 Correct 6 ms 2816 KB Output is correct
18 Correct 7 ms 2944 KB Output is correct
19 Correct 6 ms 2816 KB Output is correct
20 Correct 7 ms 2816 KB Output is correct
21 Correct 7 ms 2816 KB Output is correct
22 Correct 6 ms 2304 KB Output is correct
23 Correct 6 ms 1792 KB Output is correct
24 Correct 7 ms 2816 KB Output is correct
25 Correct 6 ms 2816 KB Output is correct
26 Correct 6 ms 2816 KB Output is correct
27 Correct 6 ms 2816 KB Output is correct
28 Correct 7 ms 2816 KB Output is correct
29 Correct 7 ms 2816 KB Output is correct
30 Correct 7 ms 2816 KB Output is correct
31 Correct 79 ms 30072 KB Output is correct
32 Correct 79 ms 30072 KB Output is correct
33 Correct 87 ms 30128 KB Output is correct
34 Correct 77 ms 30076 KB Output is correct
35 Correct 77 ms 30072 KB Output is correct
36 Correct 96 ms 30072 KB Output is correct
37 Correct 66 ms 22752 KB Output is correct
38 Correct 39 ms 16248 KB Output is correct
39 Correct 100 ms 30072 KB Output is correct
40 Correct 77 ms 30072 KB Output is correct
41 Correct 76 ms 30136 KB Output is correct
42 Correct 84 ms 30172 KB Output is correct
43 Correct 78 ms 30072 KB Output is correct
44 Correct 79 ms 30072 KB Output is correct
45 Correct 80 ms 30072 KB Output is correct

Subtask #4
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 512 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 4 ms 512 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 4 ms 384 KB Output is correct
10 Correct 5 ms 512 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 5 ms 512 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 4 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 7 ms 2816 KB Output is correct
17 Correct 6 ms 2816 KB Output is correct
18 Correct 7 ms 2944 KB Output is correct
19 Correct 6 ms 2816 KB Output is correct
20 Correct 7 ms 2816 KB Output is correct
21 Correct 7 ms 2816 KB Output is correct
22 Correct 6 ms 2304 KB Output is correct
23 Correct 6 ms 1792 KB Output is correct
24 Correct 7 ms 2816 KB Output is correct
25 Correct 6 ms 2816 KB Output is correct
26 Correct 6 ms 2816 KB Output is correct
27 Correct 6 ms 2816 KB Output is correct
28 Correct 7 ms 2816 KB Output is correct
29 Correct 7 ms 2816 KB Output is correct
30 Correct 7 ms 2816 KB Output is correct
31 Correct 79 ms 30072 KB Output is correct
32 Correct 79 ms 30072 KB Output is correct
33 Correct 87 ms 30128 KB Output is correct
34 Correct 77 ms 30076 KB Output is correct
35 Correct 77 ms 30072 KB Output is correct
36 Correct 96 ms 30072 KB Output is correct
37 Correct 66 ms 22752 KB Output is correct
38 Correct 39 ms 16248 KB Output is correct
39 Correct 100 ms 30072 KB Output is correct
40 Correct 77 ms 30072 KB Output is correct
41 Correct 76 ms 30136 KB Output is correct
42 Correct 84 ms 30172 KB Output is correct
43 Correct 78 ms 30072 KB Output is correct
44 Correct 79 ms 30072 KB Output is correct
45 Correct 80 ms 30072 KB Output is correct
46 Correct 6 ms 1536 KB Output is correct
47 Incorrect 112 ms 38904 KB Output isn't correct
48 Halted 0 ms 0 KB -

Subtask #5
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 512 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 4 ms 512 KB Output is correct
7 Correct 4 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 4 ms 384 KB Output is correct
10 Correct 5 ms 512 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 5 ms 512 KB Output is correct
13 Correct 5 ms 384 KB Output is correct
14 Correct 4 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 7 ms 2816 KB Output is correct
17 Correct 6 ms 2816 KB Output is correct
18 Correct 7 ms 2944 KB Output is correct
19 Correct 6 ms 2816 KB Output is correct
20 Correct 7 ms 2816 KB Output is correct
21 Correct 7 ms 2816 KB Output is correct
22 Correct 6 ms 2304 KB Output is correct
23 Correct 6 ms 1792 KB Output is correct
24 Correct 7 ms 2816 KB Output is correct
25 Correct 6 ms 2816 KB Output is correct
26 Correct 6 ms 2816 KB Output is correct
27 Correct 6 ms 2816 KB Output is correct
28 Correct 7 ms 2816 KB Output is correct
29 Correct 7 ms 2816 KB Output is correct
30 Correct 7 ms 2816 KB Output is correct
31 Correct 79 ms 30072 KB Output is correct
32 Correct 79 ms 30072 KB Output is correct
33 Correct 87 ms 30128 KB Output is correct
34 Correct 77 ms 30076 KB Output is correct
35 Correct 77 ms 30072 KB Output is correct
36 Correct 96 ms 30072 KB Output is correct
37 Correct 66 ms 22752 KB Output is correct
38 Correct 39 ms 16248 KB Output is correct
39 Correct 100 ms 30072 KB Output is correct
40 Correct 77 ms 30072 KB Output is correct
41 Correct 76 ms 30136 KB Output is correct
42 Correct 84 ms 30172 KB Output is correct
43 Correct 78 ms 30072 KB Output is correct
44 Correct 79 ms 30072 KB Output is correct
45 Correct 80 ms 30072 KB Output is correct
46 Correct 6 ms 1536 KB Output is correct
47 Incorrect 112 ms 38904 KB Output isn't correct
48 Halted 0 ms 0 KB -