답안 #393315

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
393315	2021-04-23T07:40:45 Z	JimmyZJX	Mountains (IOI17_mountains)	C++14	100 / 100	45 ms	31724 KB

mountains

#include <iostream>
#include <fstream>
#include <algorithm>
#include <cstring>
#include <climits>
#include <cassert>
#include <tuple>
#include <queue>
#include <stack>
#include <vector>
#include <map>
#include <set>
#include <string>
#include <unordered_set>
#include <unordered_map>
#include <numeric>

using namespace std;

typedef long long LL;
typedef vector<int> Vi;
typedef vector<LL> VL;
typedef vector<bool> Vb;
typedef vector<vector<int>> Vii;

#define forR(i, n) for (int i = 0; i < (n); i++)

template <typename T>
vector<size_t> sort_indexes(vector<T> v) {
	vector<size_t> idx(v.size());
	iota(idx.begin(), idx.end(), 0);

	stable_sort(idx.begin(), idx.end(),
		[&v](size_t i1, size_t i2) {return v[i1] < v[i2]; });

	return idx;
}

int see[2003][2003];
int dp[2003][2003];

struct Frac { // a / b
	int a, b;
};

bool ge(Frac x, Frac y) {
	return (LL)x.a * y.b >= (LL)y.a * x.b;
}

int maximum_deevs(Vi y) {
	int n = y.size();
	memset(see, 0, sizeof(see));

	Vi cnt(n);

	forR(i, n) {
		Frac view{ INT_MIN, 1 };
		for (int j = i - 1; j >= 0; j--) {
			Frac vj{ y[j] - y[i], i - j };
			if (ge(vj, view)) {
				view = vj;
				see[i][j] = 1;
				cnt[i]++;
			}
		}
		view = { INT_MIN, 1 };
		for (int j = i + 1; j < n; j++) {
			Frac vj{ y[j] - y[i], j - i };
			if (ge(vj, view)) {
				view = vj;
				see[i][j] = 1;
				cnt[i]++;
			}
		}
	}

	memset(dp, 0, sizeof(dp));
	// dp[i][j]   [i, j)
	forR(i, n) dp[i][i] = 0;

	for (int j = 1; j <= n; j++) {
		dp[j - 1][j] = 1;
		// choose (j-1)
		int last = j - 1;
		int sum = 1;
		for (int k = j - 2; k >= 0; k--) {
			if (see[j - 1][k]) {
				sum += dp[k + 1][last];
				last = k;
			}
			dp[k][j] = max(dp[k][j - 1], dp[k][last] + sum);
		}
	}


	return dp[0][n];
}


#ifdef TEST_LOCAL
int main() {
	auto r = maximum_deevs(Vi{ 0,1,1000000,1500001,1499997,1499992,1499986,1499979,1499971,1499962,1499952,1499941,1499929,1499916,1499902,1499887,1499871,1499854,1000000000 });

	return 0;
}
#endif

Subtask #1
20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	13 ms	31692 KB	Output is correct
2	Correct	13 ms	31692 KB	Output is correct
3	Correct	15 ms	31692 KB	Output is correct
4	Correct	14 ms	31648 KB	Output is correct
5	Correct	13 ms	31692 KB	Output is correct
6	Correct	13 ms	31700 KB	Output is correct
7	Correct	13 ms	31588 KB	Output is correct
8	Correct	14 ms	31700 KB	Output is correct
9	Correct	14 ms	31692 KB	Output is correct
10	Correct	16 ms	31708 KB	Output is correct
11	Correct	13 ms	31692 KB	Output is correct
12	Correct	14 ms	31692 KB	Output is correct
13	Correct	14 ms	31672 KB	Output is correct
14	Correct	14 ms	31692 KB	Output is correct
15	Correct	14 ms	31580 KB	Output is correct
16	Correct	14 ms	31628 KB	Output is correct

Subtask #2
20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	13 ms	31692 KB	Output is correct
2	Correct	13 ms	31692 KB	Output is correct
3	Correct	15 ms	31692 KB	Output is correct
4	Correct	14 ms	31648 KB	Output is correct
5	Correct	13 ms	31692 KB	Output is correct
6	Correct	13 ms	31700 KB	Output is correct
7	Correct	13 ms	31588 KB	Output is correct
8	Correct	14 ms	31700 KB	Output is correct
9	Correct	14 ms	31692 KB	Output is correct
10	Correct	16 ms	31708 KB	Output is correct
11	Correct	13 ms	31692 KB	Output is correct
12	Correct	14 ms	31692 KB	Output is correct
13	Correct	14 ms	31672 KB	Output is correct
14	Correct	14 ms	31692 KB	Output is correct
15	Correct	14 ms	31580 KB	Output is correct
16	Correct	14 ms	31628 KB	Output is correct
17	Correct	14 ms	31696 KB	Output is correct
18	Correct	13 ms	31692 KB	Output is correct
19	Correct	14 ms	31636 KB	Output is correct
20	Correct	15 ms	31592 KB	Output is correct
21	Correct	14 ms	31692 KB	Output is correct
22	Correct	14 ms	31692 KB	Output is correct
23	Correct	14 ms	31692 KB	Output is correct
24	Correct	14 ms	31692 KB	Output is correct
25	Correct	14 ms	31668 KB	Output is correct
26	Correct	14 ms	31588 KB	Output is correct
27	Correct	13 ms	31668 KB	Output is correct
28	Correct	14 ms	31692 KB	Output is correct
29	Correct	14 ms	31632 KB	Output is correct
30	Correct	15 ms	31692 KB	Output is correct
31	Correct	16 ms	31692 KB	Output is correct
32	Correct	16 ms	31660 KB	Output is correct
33	Correct	15 ms	31612 KB	Output is correct
34	Correct	14 ms	31692 KB	Output is correct
35	Correct	14 ms	31692 KB	Output is correct
36	Correct	14 ms	31600 KB	Output is correct
37	Correct	14 ms	31692 KB	Output is correct
38	Correct	14 ms	31676 KB	Output is correct

Subtask #3
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	13 ms	31692 KB	Output is correct
2	Correct	13 ms	31692 KB	Output is correct
3	Correct	15 ms	31692 KB	Output is correct
4	Correct	14 ms	31648 KB	Output is correct
5	Correct	13 ms	31692 KB	Output is correct
6	Correct	13 ms	31700 KB	Output is correct
7	Correct	13 ms	31588 KB	Output is correct
8	Correct	14 ms	31700 KB	Output is correct
9	Correct	14 ms	31692 KB	Output is correct
10	Correct	16 ms	31708 KB	Output is correct
11	Correct	13 ms	31692 KB	Output is correct
12	Correct	14 ms	31692 KB	Output is correct
13	Correct	14 ms	31672 KB	Output is correct
14	Correct	14 ms	31692 KB	Output is correct
15	Correct	14 ms	31580 KB	Output is correct
16	Correct	14 ms	31628 KB	Output is correct
17	Correct	14 ms	31696 KB	Output is correct
18	Correct	13 ms	31692 KB	Output is correct
19	Correct	14 ms	31636 KB	Output is correct
20	Correct	15 ms	31592 KB	Output is correct
21	Correct	14 ms	31692 KB	Output is correct
22	Correct	14 ms	31692 KB	Output is correct
23	Correct	14 ms	31692 KB	Output is correct
24	Correct	14 ms	31692 KB	Output is correct
25	Correct	14 ms	31668 KB	Output is correct
26	Correct	14 ms	31588 KB	Output is correct
27	Correct	13 ms	31668 KB	Output is correct
28	Correct	14 ms	31692 KB	Output is correct
29	Correct	14 ms	31632 KB	Output is correct
30	Correct	15 ms	31692 KB	Output is correct
31	Correct	16 ms	31692 KB	Output is correct
32	Correct	16 ms	31660 KB	Output is correct
33	Correct	15 ms	31612 KB	Output is correct
34	Correct	14 ms	31692 KB	Output is correct
35	Correct	14 ms	31692 KB	Output is correct
36	Correct	14 ms	31600 KB	Output is correct
37	Correct	14 ms	31692 KB	Output is correct
38	Correct	14 ms	31676 KB	Output is correct
39	Correct	14 ms	31684 KB	Output is correct
40	Correct	14 ms	31620 KB	Output is correct
41	Correct	15 ms	31672 KB	Output is correct
42	Correct	16 ms	31704 KB	Output is correct
43	Correct	14 ms	31612 KB	Output is correct
44	Correct	15 ms	31648 KB	Output is correct
45	Correct	15 ms	31692 KB	Output is correct
46	Correct	14 ms	31660 KB	Output is correct
47	Correct	16 ms	31608 KB	Output is correct
48	Correct	16 ms	31676 KB	Output is correct
49	Correct	15 ms	31692 KB	Output is correct
50	Correct	14 ms	31692 KB	Output is correct
51	Correct	14 ms	31696 KB	Output is correct
52	Correct	14 ms	31680 KB	Output is correct
53	Correct	14 ms	31684 KB	Output is correct
54	Correct	16 ms	31692 KB	Output is correct
55	Correct	14 ms	31680 KB	Output is correct
56	Correct	14 ms	31700 KB	Output is correct
57	Correct	17 ms	31692 KB	Output is correct
58	Correct	16 ms	31692 KB	Output is correct
59	Correct	14 ms	31648 KB	Output is correct
60	Correct	14 ms	31692 KB	Output is correct
61	Correct	14 ms	31692 KB	Output is correct

Subtask #4
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	13 ms	31692 KB	Output is correct
2	Correct	13 ms	31692 KB	Output is correct
3	Correct	15 ms	31692 KB	Output is correct
4	Correct	14 ms	31648 KB	Output is correct
5	Correct	13 ms	31692 KB	Output is correct
6	Correct	13 ms	31700 KB	Output is correct
7	Correct	13 ms	31588 KB	Output is correct
8	Correct	14 ms	31700 KB	Output is correct
9	Correct	14 ms	31692 KB	Output is correct
10	Correct	16 ms	31708 KB	Output is correct
11	Correct	13 ms	31692 KB	Output is correct
12	Correct	14 ms	31692 KB	Output is correct
13	Correct	14 ms	31672 KB	Output is correct
14	Correct	14 ms	31692 KB	Output is correct
15	Correct	14 ms	31580 KB	Output is correct
16	Correct	14 ms	31628 KB	Output is correct
17	Correct	14 ms	31696 KB	Output is correct
18	Correct	13 ms	31692 KB	Output is correct
19	Correct	14 ms	31636 KB	Output is correct
20	Correct	15 ms	31592 KB	Output is correct
21	Correct	14 ms	31692 KB	Output is correct
22	Correct	14 ms	31692 KB	Output is correct
23	Correct	14 ms	31692 KB	Output is correct
24	Correct	14 ms	31692 KB	Output is correct
25	Correct	14 ms	31668 KB	Output is correct
26	Correct	14 ms	31588 KB	Output is correct
27	Correct	13 ms	31668 KB	Output is correct
28	Correct	14 ms	31692 KB	Output is correct
29	Correct	14 ms	31632 KB	Output is correct
30	Correct	15 ms	31692 KB	Output is correct
31	Correct	16 ms	31692 KB	Output is correct
32	Correct	16 ms	31660 KB	Output is correct
33	Correct	15 ms	31612 KB	Output is correct
34	Correct	14 ms	31692 KB	Output is correct
35	Correct	14 ms	31692 KB	Output is correct
36	Correct	14 ms	31600 KB	Output is correct
37	Correct	14 ms	31692 KB	Output is correct
38	Correct	14 ms	31676 KB	Output is correct
39	Correct	14 ms	31684 KB	Output is correct
40	Correct	14 ms	31620 KB	Output is correct
41	Correct	15 ms	31672 KB	Output is correct
42	Correct	16 ms	31704 KB	Output is correct
43	Correct	14 ms	31612 KB	Output is correct
44	Correct	15 ms	31648 KB	Output is correct
45	Correct	15 ms	31692 KB	Output is correct
46	Correct	14 ms	31660 KB	Output is correct
47	Correct	16 ms	31608 KB	Output is correct
48	Correct	16 ms	31676 KB	Output is correct
49	Correct	15 ms	31692 KB	Output is correct
50	Correct	14 ms	31692 KB	Output is correct
51	Correct	14 ms	31696 KB	Output is correct
52	Correct	14 ms	31680 KB	Output is correct
53	Correct	14 ms	31684 KB	Output is correct
54	Correct	16 ms	31692 KB	Output is correct
55	Correct	14 ms	31680 KB	Output is correct
56	Correct	14 ms	31700 KB	Output is correct
57	Correct	17 ms	31692 KB	Output is correct
58	Correct	16 ms	31692 KB	Output is correct
59	Correct	14 ms	31648 KB	Output is correct
60	Correct	14 ms	31692 KB	Output is correct
61	Correct	14 ms	31692 KB	Output is correct
62	Correct	17 ms	31636 KB	Output is correct
63	Correct	26 ms	31724 KB	Output is correct
64	Correct	31 ms	31664 KB	Output is correct
65	Correct	30 ms	31692 KB	Output is correct
66	Correct	30 ms	31640 KB	Output is correct
67	Correct	30 ms	31668 KB	Output is correct
68	Correct	30 ms	31656 KB	Output is correct
69	Correct	30 ms	31656 KB	Output is correct
70	Correct	43 ms	31692 KB	Output is correct
71	Correct	37 ms	31720 KB	Output is correct
72	Correct	40 ms	31664 KB	Output is correct
73	Correct	36 ms	31680 KB	Output is correct
74	Correct	36 ms	31684 KB	Output is correct
75	Correct	36 ms	31628 KB	Output is correct
76	Correct	30 ms	31684 KB	Output is correct
77	Correct	45 ms	31632 KB	Output is correct
78	Correct	45 ms	31632 KB	Output is correct
79	Correct	44 ms	31692 KB	Output is correct
80	Correct	44 ms	31692 KB	Output is correct
81	Correct	44 ms	31660 KB	Output is correct
82	Correct	30 ms	31708 KB	Output is correct
83	Correct	32 ms	31692 KB	Output is correct
84	Correct	36 ms	31724 KB	Output is correct
85	Correct	30 ms	31664 KB	Output is correct
86	Correct	31 ms	31668 KB	Output is correct

답안 #393315

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