답안 #74439 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
74439	2018-09-01T10:11:28 Z	mjt	Mountains (IOI17_mountains)	C++11	100 / 100	24 ms	9040 KB

mountains

#include"mountains.h"
#include<bits/stdc++.h>
using namespace std;

const int N = 2010;
int y[N];
int f[N][N];

bool Judge(int a,int b,int c) { // a see c ?
	// ((y[a] - y[b]) / (a - b)) > ((y[a] - y[c]) / (a - c));
	return 1ll * (y[a] - y[b]) * (a - c) > 1ll * (y[a] - y[c]) * (a - b);
}

int solve(int l,int r) {
	if (f[l][r]) return f[l][r];
	if (l > r) return 0;
	if (l == r) return 1;
	int pos = -1, mx = -1;
	for (int i=l; i<=r; ++i) if (y[i] > mx) pos = i, mx = y[i];
	int ans1 = solve(l, pos - 1) + solve(pos + 1, r); // select max_height_node
	
	int ans2 = 0; // don't select this node
	for (int i=pos-1,j; i>=l; i=j) {
		for (j=i-1; j>=l; --j) {  // i can see pos
			if (Judge(j, i, pos)) { // j can't see pos
				if (j == l) ans2 += solve(l, i - 1); 
				continue;
			}
			if (j + 1 <= i - 1) ans2 += solve(j + 1, i - 1); // this Section can't see pos
			break;
		}
	}
	for (int i=pos+1,j; i<=r; i=j) {
		for (j=i+1; j<=r; ++j) {
			if (Judge(pos, i, j)) {
				if (j == r) ans2 += solve(i + 1, r);
				continue;
			}
			if (i + 1 <= j - 1) ans2 += solve(i + 1, j - 1);
			break;
		}
	} 
	return f[l][r] = max(ans1, ans2 + 1);
}

int maximum_deevs(vector<int> A) {
	int n = A.size();
	for (int i=1; i<=n; ++i) y[i] = A[i - 1];
	return solve(1, n);
}

Subtask #1
20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	256 KB	Output is correct
2	Correct	2 ms	372 KB	Output is correct
3	Correct	2 ms	392 KB	Output is correct
4	Correct	2 ms	392 KB	Output is correct
5	Correct	2 ms	472 KB	Output is correct
6	Correct	2 ms	484 KB	Output is correct
7	Correct	2 ms	484 KB	Output is correct
8	Correct	2 ms	484 KB	Output is correct
9	Correct	2 ms	540 KB	Output is correct
10	Correct	2 ms	544 KB	Output is correct
11	Correct	2 ms	544 KB	Output is correct
12	Correct	2 ms	560 KB	Output is correct
13	Correct	2 ms	560 KB	Output is correct
14	Correct	2 ms	560 KB	Output is correct
15	Correct	2 ms	616 KB	Output is correct
16	Correct	2 ms	636 KB	Output is correct

Subtask #2
20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	256 KB	Output is correct
2	Correct	2 ms	372 KB	Output is correct
3	Correct	2 ms	392 KB	Output is correct
4	Correct	2 ms	392 KB	Output is correct
5	Correct	2 ms	472 KB	Output is correct
6	Correct	2 ms	484 KB	Output is correct
7	Correct	2 ms	484 KB	Output is correct
8	Correct	2 ms	484 KB	Output is correct
9	Correct	2 ms	540 KB	Output is correct
10	Correct	2 ms	544 KB	Output is correct
11	Correct	2 ms	544 KB	Output is correct
12	Correct	2 ms	560 KB	Output is correct
13	Correct	2 ms	560 KB	Output is correct
14	Correct	2 ms	560 KB	Output is correct
15	Correct	2 ms	616 KB	Output is correct
16	Correct	2 ms	636 KB	Output is correct
17	Correct	2 ms	636 KB	Output is correct
18	Correct	2 ms	636 KB	Output is correct
19	Correct	2 ms	636 KB	Output is correct
20	Correct	2 ms	636 KB	Output is correct
21	Correct	2 ms	636 KB	Output is correct
22	Correct	2 ms	704 KB	Output is correct
23	Correct	1 ms	704 KB	Output is correct
24	Correct	2 ms	704 KB	Output is correct
25	Correct	2 ms	704 KB	Output is correct
26	Correct	2 ms	704 KB	Output is correct
27	Correct	2 ms	704 KB	Output is correct
28	Correct	2 ms	704 KB	Output is correct
29	Correct	2 ms	704 KB	Output is correct
30	Correct	2 ms	704 KB	Output is correct
31	Correct	2 ms	704 KB	Output is correct
32	Correct	2 ms	704 KB	Output is correct
33	Correct	2 ms	704 KB	Output is correct
34	Correct	2 ms	704 KB	Output is correct
35	Correct	2 ms	704 KB	Output is correct
36	Correct	2 ms	704 KB	Output is correct
37	Correct	2 ms	764 KB	Output is correct
38	Correct	2 ms	764 KB	Output is correct

Subtask #3
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	256 KB	Output is correct
2	Correct	2 ms	372 KB	Output is correct
3	Correct	2 ms	392 KB	Output is correct
4	Correct	2 ms	392 KB	Output is correct
5	Correct	2 ms	472 KB	Output is correct
6	Correct	2 ms	484 KB	Output is correct
7	Correct	2 ms	484 KB	Output is correct
8	Correct	2 ms	484 KB	Output is correct
9	Correct	2 ms	540 KB	Output is correct
10	Correct	2 ms	544 KB	Output is correct
11	Correct	2 ms	544 KB	Output is correct
12	Correct	2 ms	560 KB	Output is correct
13	Correct	2 ms	560 KB	Output is correct
14	Correct	2 ms	560 KB	Output is correct
15	Correct	2 ms	616 KB	Output is correct
16	Correct	2 ms	636 KB	Output is correct
17	Correct	2 ms	636 KB	Output is correct
18	Correct	2 ms	636 KB	Output is correct
19	Correct	2 ms	636 KB	Output is correct
20	Correct	2 ms	636 KB	Output is correct
21	Correct	2 ms	636 KB	Output is correct
22	Correct	2 ms	704 KB	Output is correct
23	Correct	1 ms	704 KB	Output is correct
24	Correct	2 ms	704 KB	Output is correct
25	Correct	2 ms	704 KB	Output is correct
26	Correct	2 ms	704 KB	Output is correct
27	Correct	2 ms	704 KB	Output is correct
28	Correct	2 ms	704 KB	Output is correct
29	Correct	2 ms	704 KB	Output is correct
30	Correct	2 ms	704 KB	Output is correct
31	Correct	2 ms	704 KB	Output is correct
32	Correct	2 ms	704 KB	Output is correct
33	Correct	2 ms	704 KB	Output is correct
34	Correct	2 ms	704 KB	Output is correct
35	Correct	2 ms	704 KB	Output is correct
36	Correct	2 ms	704 KB	Output is correct
37	Correct	2 ms	764 KB	Output is correct
38	Correct	2 ms	764 KB	Output is correct
39	Correct	3 ms	892 KB	Output is correct
40	Correct	3 ms	1020 KB	Output is correct
41	Correct	2 ms	1020 KB	Output is correct
42	Correct	2 ms	1020 KB	Output is correct
43	Correct	3 ms	1020 KB	Output is correct
44	Correct	2 ms	1020 KB	Output is correct
45	Correct	3 ms	1020 KB	Output is correct
46	Correct	3 ms	1020 KB	Output is correct
47	Correct	3 ms	1148 KB	Output is correct
48	Correct	2 ms	1148 KB	Output is correct
49	Correct	3 ms	1148 KB	Output is correct
50	Correct	3 ms	1148 KB	Output is correct
51	Correct	2 ms	1148 KB	Output is correct
52	Correct	5 ms	1276 KB	Output is correct
53	Correct	3 ms	1276 KB	Output is correct
54	Correct	4 ms	1276 KB	Output is correct
55	Correct	4 ms	1276 KB	Output is correct
56	Correct	4 ms	1280 KB	Output is correct
57	Correct	2 ms	1280 KB	Output is correct
58	Correct	3 ms	1280 KB	Output is correct
59	Correct	3 ms	1280 KB	Output is correct
60	Correct	2 ms	1280 KB	Output is correct
61	Correct	3 ms	1788 KB	Output is correct

Subtask #4
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	256 KB	Output is correct
2	Correct	2 ms	372 KB	Output is correct
3	Correct	2 ms	392 KB	Output is correct
4	Correct	2 ms	392 KB	Output is correct
5	Correct	2 ms	472 KB	Output is correct
6	Correct	2 ms	484 KB	Output is correct
7	Correct	2 ms	484 KB	Output is correct
8	Correct	2 ms	484 KB	Output is correct
9	Correct	2 ms	540 KB	Output is correct
10	Correct	2 ms	544 KB	Output is correct
11	Correct	2 ms	544 KB	Output is correct
12	Correct	2 ms	560 KB	Output is correct
13	Correct	2 ms	560 KB	Output is correct
14	Correct	2 ms	560 KB	Output is correct
15	Correct	2 ms	616 KB	Output is correct
16	Correct	2 ms	636 KB	Output is correct
17	Correct	2 ms	636 KB	Output is correct
18	Correct	2 ms	636 KB	Output is correct
19	Correct	2 ms	636 KB	Output is correct
20	Correct	2 ms	636 KB	Output is correct
21	Correct	2 ms	636 KB	Output is correct
22	Correct	2 ms	704 KB	Output is correct
23	Correct	1 ms	704 KB	Output is correct
24	Correct	2 ms	704 KB	Output is correct
25	Correct	2 ms	704 KB	Output is correct
26	Correct	2 ms	704 KB	Output is correct
27	Correct	2 ms	704 KB	Output is correct
28	Correct	2 ms	704 KB	Output is correct
29	Correct	2 ms	704 KB	Output is correct
30	Correct	2 ms	704 KB	Output is correct
31	Correct	2 ms	704 KB	Output is correct
32	Correct	2 ms	704 KB	Output is correct
33	Correct	2 ms	704 KB	Output is correct
34	Correct	2 ms	704 KB	Output is correct
35	Correct	2 ms	704 KB	Output is correct
36	Correct	2 ms	704 KB	Output is correct
37	Correct	2 ms	764 KB	Output is correct
38	Correct	2 ms	764 KB	Output is correct
39	Correct	3 ms	892 KB	Output is correct
40	Correct	3 ms	1020 KB	Output is correct
41	Correct	2 ms	1020 KB	Output is correct
42	Correct	2 ms	1020 KB	Output is correct
43	Correct	3 ms	1020 KB	Output is correct
44	Correct	2 ms	1020 KB	Output is correct
45	Correct	3 ms	1020 KB	Output is correct
46	Correct	3 ms	1020 KB	Output is correct
47	Correct	3 ms	1148 KB	Output is correct
48	Correct	2 ms	1148 KB	Output is correct
49	Correct	3 ms	1148 KB	Output is correct
50	Correct	3 ms	1148 KB	Output is correct
51	Correct	2 ms	1148 KB	Output is correct
52	Correct	5 ms	1276 KB	Output is correct
53	Correct	3 ms	1276 KB	Output is correct
54	Correct	4 ms	1276 KB	Output is correct
55	Correct	4 ms	1276 KB	Output is correct
56	Correct	4 ms	1280 KB	Output is correct
57	Correct	2 ms	1280 KB	Output is correct
58	Correct	3 ms	1280 KB	Output is correct
59	Correct	3 ms	1280 KB	Output is correct
60	Correct	2 ms	1280 KB	Output is correct
61	Correct	3 ms	1788 KB	Output is correct
62	Correct	4 ms	1916 KB	Output is correct
63	Correct	6 ms	3324 KB	Output is correct
64	Correct	6 ms	3324 KB	Output is correct
65	Correct	6 ms	3324 KB	Output is correct
66	Correct	6 ms	3324 KB	Output is correct
67	Correct	8 ms	3324 KB	Output is correct
68	Correct	6 ms	3324 KB	Output is correct
69	Correct	6 ms	3324 KB	Output is correct
70	Correct	12 ms	4604 KB	Output is correct
71	Correct	11 ms	4604 KB	Output is correct
72	Correct	11 ms	4604 KB	Output is correct
73	Correct	11 ms	4604 KB	Output is correct
74	Correct	11 ms	4604 KB	Output is correct
75	Correct	12 ms	4604 KB	Output is correct
76	Correct	5 ms	4604 KB	Output is correct
77	Correct	22 ms	8316 KB	Output is correct
78	Correct	21 ms	8316 KB	Output is correct
79	Correct	24 ms	8316 KB	Output is correct
80	Correct	21 ms	8316 KB	Output is correct
81	Correct	22 ms	8316 KB	Output is correct
82	Correct	10 ms	8316 KB	Output is correct
83	Correct	16 ms	8316 KB	Output is correct
84	Correct	13 ms	8316 KB	Output is correct
85	Correct	11 ms	8316 KB	Output is correct
86	Correct	18 ms	9040 KB	Output is correct

답안 #74439

Compilation message

Subtask #1 20.0 / 20.0

Subtask #2 20.0 / 20.0

Subtask #3 30.0 / 30.0

Subtask #4 30.0 / 30.0

Subtask #1
20.0 / 20.0

Subtask #2
20.0 / 20.0

Subtask #3
30.0 / 30.0

Subtask #4
30.0 / 30.0