답안 #34899 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
34899	2017-11-16T16:33:38 Z	cheater2k	Boat (APIO16_boat)	C++14	100 / 100	536 ms	5240 KB

boat

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

const int N = 510;
const int md = 1e9 + 7;

int n;
int a[N], b[N];
vector<int> z;
int len[N * 2], sz;
int clen[N * 2][N], c[N][N];
int f[N], sum[N], g[N];

int pw(int a, int b) {
	int res = 1;
	while(b) {
		if (b & 1) res = 1LL * res * a % md; 
		a = 1LL * a * a % md;
		b >>= 1;
	}
	return res;
}

int main() {
	ios_base::sync_with_stdio(false); cin.tie(0);
	cin >> n;
	for (int i = 1; i <= n; ++i) {
		cin >> a[i] >> b[i]; ++b[i];
		z.push_back(a[i]); z.push_back(b[i]);
	}
	sort(z.begin(), z.end());
	z.resize(distance(z.begin(), unique(z.begin(), z.end())));

	for (int i = 0; i < (int)z.size() - 1; ++i) {
		len[++sz] = z[i + 1] - z[i];
		clen[sz][0] = 1;
		for (int j = 1; j <= n; ++j) {
			if (j > len[sz]) continue;
			clen[sz][j] = 1LL * clen[sz][j-1] * (len[sz] - j + 1) % md;
			clen[sz][j] = 1LL * clen[sz][j] * pw(j, md - 2) % md;
		}
	}

	for (int i = 0; i <= n; ++i) c[i][0] = 1;
	for (int i = 1; i <= n; ++i) {
		for (int j = 1; j <= i; ++j) c[i][j] = (c[i-1][j-1] + c[i-1][j]) % md;
	}

	for (int k = 1; k <= sz; ++k) {
		vector<int> cand;
		for (int i = 1; i <= n; ++i) {
			if (a[i] <= z[k - 1] && z[k] <= b[i]) cand.push_back(i);
		}
		int s = cand.size();

		for (int i = 0; i < s; ++i) {
			if (i == 0) {
				for (int gap = 0; gap <= s; ++gap) g[gap] = 0;
				g[1] = len[k];
				for (int j = 1; j < s; ++j) {
					int gap = j - i + 1;
					for (int choose = 2; choose <= gap && choose <= len[k]; ++choose) {
						g[gap] = (g[gap] + 1LL * clen[k][choose] * c[gap-2][choose-2]) % md;
					}
				}
			}

			for (int j = i; j < s; ++j) {
				f[j] = (f[j] + 1LL * g[j - i + 1] * (sum[cand[i]-1] + 1)) % md;
			}
		}

		int cur = 0, pt = 0;
		for (int i = 1; i <= n; ++i) {
			while(pt < s && cand[pt] == i) cur = (cur + f[pt]) % md, f[pt] = 0, ++pt;
			sum[i] = (sum[i] + cur) % md;
		}
	}

	cout << sum[n] << '\n';
}

Subtask #1
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	59 ms	5240 KB	Output is correct
2	Correct	63 ms	5240 KB	Output is correct
3	Correct	63 ms	5240 KB	Output is correct
4	Correct	63 ms	5240 KB	Output is correct
5	Correct	63 ms	5240 KB	Output is correct
6	Correct	59 ms	5240 KB	Output is correct
7	Correct	59 ms	5240 KB	Output is correct
8	Correct	56 ms	5240 KB	Output is correct
9	Correct	59 ms	5240 KB	Output is correct
10	Correct	56 ms	5240 KB	Output is correct
11	Correct	49 ms	5240 KB	Output is correct
12	Correct	56 ms	5240 KB	Output is correct
13	Correct	59 ms	5240 KB	Output is correct
14	Correct	59 ms	5240 KB	Output is correct
15	Correct	59 ms	5240 KB	Output is correct
16	Correct	9 ms	5240 KB	Output is correct
17	Correct	9 ms	5240 KB	Output is correct
18	Correct	9 ms	5240 KB	Output is correct
19	Correct	13 ms	5240 KB	Output is correct
20	Correct	9 ms	5240 KB	Output is correct

Subtask #2
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	59 ms	5240 KB	Output is correct
2	Correct	63 ms	5240 KB	Output is correct
3	Correct	63 ms	5240 KB	Output is correct
4	Correct	63 ms	5240 KB	Output is correct
5	Correct	63 ms	5240 KB	Output is correct
6	Correct	59 ms	5240 KB	Output is correct
7	Correct	59 ms	5240 KB	Output is correct
8	Correct	56 ms	5240 KB	Output is correct
9	Correct	59 ms	5240 KB	Output is correct
10	Correct	56 ms	5240 KB	Output is correct
11	Correct	49 ms	5240 KB	Output is correct
12	Correct	56 ms	5240 KB	Output is correct
13	Correct	59 ms	5240 KB	Output is correct
14	Correct	59 ms	5240 KB	Output is correct
15	Correct	59 ms	5240 KB	Output is correct
16	Correct	9 ms	5240 KB	Output is correct
17	Correct	9 ms	5240 KB	Output is correct
18	Correct	9 ms	5240 KB	Output is correct
19	Correct	13 ms	5240 KB	Output is correct
20	Correct	9 ms	5240 KB	Output is correct
21	Correct	66 ms	5240 KB	Output is correct
22	Correct	66 ms	5240 KB	Output is correct
23	Correct	59 ms	5240 KB	Output is correct
24	Correct	66 ms	5240 KB	Output is correct
25	Correct	63 ms	5240 KB	Output is correct
26	Correct	136 ms	5240 KB	Output is correct
27	Correct	139 ms	5240 KB	Output is correct
28	Correct	146 ms	5240 KB	Output is correct
29	Correct	133 ms	5240 KB	Output is correct
30	Correct	49 ms	5240 KB	Output is correct
31	Correct	53 ms	5240 KB	Output is correct
32	Correct	49 ms	5240 KB	Output is correct
33	Correct	49 ms	5240 KB	Output is correct
34	Correct	53 ms	5240 KB	Output is correct
35	Correct	53 ms	5240 KB	Output is correct
36	Correct	53 ms	5240 KB	Output is correct
37	Correct	56 ms	5240 KB	Output is correct
38	Correct	53 ms	5240 KB	Output is correct

Subtask #3
27.0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Correct	6 ms	5240 KB	Output is correct
2	Correct	3 ms	5240 KB	Output is correct
3	Correct	6 ms	5240 KB	Output is correct
4	Correct	3 ms	5240 KB	Output is correct
5	Correct	6 ms	5240 KB	Output is correct
6	Correct	6 ms	5240 KB	Output is correct
7	Correct	6 ms	5240 KB	Output is correct
8	Correct	6 ms	5240 KB	Output is correct
9	Correct	6 ms	5240 KB	Output is correct
10	Correct	6 ms	5240 KB	Output is correct
11	Correct	6 ms	5240 KB	Output is correct
12	Correct	3 ms	5240 KB	Output is correct
13	Correct	3 ms	5240 KB	Output is correct
14	Correct	0 ms	5240 KB	Output is correct
15	Correct	3 ms	5240 KB	Output is correct
16	Correct	0 ms	5240 KB	Output is correct
17	Correct	3 ms	5240 KB	Output is correct
18	Correct	3 ms	5240 KB	Output is correct
19	Correct	3 ms	5240 KB	Output is correct
20	Correct	3 ms	5240 KB	Output is correct

Subtask #4
42.0 / 42.0

#	결과	실행 시간	메모리	Grader output
1	Correct	59 ms	5240 KB	Output is correct
2	Correct	63 ms	5240 KB	Output is correct
3	Correct	63 ms	5240 KB	Output is correct
4	Correct	63 ms	5240 KB	Output is correct
5	Correct	63 ms	5240 KB	Output is correct
6	Correct	59 ms	5240 KB	Output is correct
7	Correct	59 ms	5240 KB	Output is correct
8	Correct	56 ms	5240 KB	Output is correct
9	Correct	59 ms	5240 KB	Output is correct
10	Correct	56 ms	5240 KB	Output is correct
11	Correct	49 ms	5240 KB	Output is correct
12	Correct	56 ms	5240 KB	Output is correct
13	Correct	59 ms	5240 KB	Output is correct
14	Correct	59 ms	5240 KB	Output is correct
15	Correct	59 ms	5240 KB	Output is correct
16	Correct	9 ms	5240 KB	Output is correct
17	Correct	9 ms	5240 KB	Output is correct
18	Correct	9 ms	5240 KB	Output is correct
19	Correct	13 ms	5240 KB	Output is correct
20	Correct	9 ms	5240 KB	Output is correct
21	Correct	66 ms	5240 KB	Output is correct
22	Correct	66 ms	5240 KB	Output is correct
23	Correct	59 ms	5240 KB	Output is correct
24	Correct	66 ms	5240 KB	Output is correct
25	Correct	63 ms	5240 KB	Output is correct
26	Correct	136 ms	5240 KB	Output is correct
27	Correct	139 ms	5240 KB	Output is correct
28	Correct	146 ms	5240 KB	Output is correct
29	Correct	133 ms	5240 KB	Output is correct
30	Correct	49 ms	5240 KB	Output is correct
31	Correct	53 ms	5240 KB	Output is correct
32	Correct	49 ms	5240 KB	Output is correct
33	Correct	49 ms	5240 KB	Output is correct
34	Correct	53 ms	5240 KB	Output is correct
35	Correct	53 ms	5240 KB	Output is correct
36	Correct	53 ms	5240 KB	Output is correct
37	Correct	56 ms	5240 KB	Output is correct
38	Correct	53 ms	5240 KB	Output is correct
39	Correct	6 ms	5240 KB	Output is correct
40	Correct	3 ms	5240 KB	Output is correct
41	Correct	6 ms	5240 KB	Output is correct
42	Correct	3 ms	5240 KB	Output is correct
43	Correct	6 ms	5240 KB	Output is correct
44	Correct	6 ms	5240 KB	Output is correct
45	Correct	6 ms	5240 KB	Output is correct
46	Correct	6 ms	5240 KB	Output is correct
47	Correct	6 ms	5240 KB	Output is correct
48	Correct	6 ms	5240 KB	Output is correct
49	Correct	6 ms	5240 KB	Output is correct
50	Correct	3 ms	5240 KB	Output is correct
51	Correct	3 ms	5240 KB	Output is correct
52	Correct	0 ms	5240 KB	Output is correct
53	Correct	3 ms	5240 KB	Output is correct
54	Correct	0 ms	5240 KB	Output is correct
55	Correct	3 ms	5240 KB	Output is correct
56	Correct	3 ms	5240 KB	Output is correct
57	Correct	3 ms	5240 KB	Output is correct
58	Correct	3 ms	5240 KB	Output is correct
59	Correct	289 ms	5240 KB	Output is correct
60	Correct	273 ms	5240 KB	Output is correct
61	Correct	279 ms	5240 KB	Output is correct
62	Correct	303 ms	5240 KB	Output is correct
63	Correct	279 ms	5240 KB	Output is correct
64	Correct	513 ms	5240 KB	Output is correct
65	Correct	526 ms	5240 KB	Output is correct
66	Correct	529 ms	5240 KB	Output is correct
67	Correct	506 ms	5240 KB	Output is correct
68	Correct	536 ms	5240 KB	Output is correct
69	Correct	283 ms	5240 KB	Output is correct
70	Correct	269 ms	5240 KB	Output is correct
71	Correct	273 ms	5240 KB	Output is correct
72	Correct	269 ms	5240 KB	Output is correct
73	Correct	276 ms	5240 KB	Output is correct
74	Correct	36 ms	5240 KB	Output is correct
75	Correct	33 ms	5240 KB	Output is correct
76	Correct	33 ms	5240 KB	Output is correct
77	Correct	33 ms	5240 KB	Output is correct
78	Correct	36 ms	5240 KB	Output is correct

답안 #34899

Compilation message

Subtask #1 9.0 / 9.0

Subtask #2 22.0 / 22.0

Subtask #3 27.0 / 27.0

Subtask #4 42.0 / 42.0

Subtask #1
9.0 / 9.0

Subtask #2
22.0 / 22.0

Subtask #3
27.0 / 27.0

Subtask #4
42.0 / 42.0