답안 #47662 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
47662	2018-05-06T07:56:50 Z	square1001	Boat (APIO16_boat)	C++14	100 / 100	442 ms	4724 KB

boat

#include <iostream>
#include <algorithm>
using namespace std;
const int mod = 1000000007;
int n, c, a[509], b[509], x[1009], inv[509], comb[1009][509], dp[509][1009];
int main() {
	cin >> n;
	for (int i = 0; i < n; ++i) {
		cin >> a[i] >> b[i];
		x[i] = a[i];
		x[i + n] = ++b[i];
	}
	sort(x, x + 2 * n);
	c = unique(x, x + 2 * n) - x;
	for (int i = 0; i < n; ++i) {
		a[i] = lower_bound(x, x + c, a[i]) - x;
		b[i] = lower_bound(x, x + c, b[i]) - x;
	}
	inv[1] = 1;
	for (int i = 2; i <= n; ++i) {
		inv[i] = 1LL * inv[mod % i] * (mod - mod / i) % mod;
	}
	for (int i = 0; i < c - 1; ++i) {
		int way = 1;
		for (int j = 1; j <= n; ++j) {
			way = 1LL * way * (x[i + 1] - x[i] + j - 1) % mod * inv[j] % mod;
			comb[i][j] = way;
			if (comb[i][j] >= mod) comb[i][j] -= mod;
		}
	}
	int ans = 0;
	for (int i = 0; i < n; ++i) {
		for (int j = a[i]; j < b[i]; ++j) {
			int num = 0;
			for (int k = i - 1; k >= 0; --k) {
				if (a[k + 1] <= j && j < b[k + 1]) ++num;
				dp[i][j + 1] = (dp[i][j + 1] + 1LL * comb[j][num] * dp[k][j]) % mod;
			}
			if (a[0] <= j && j < b[0]) ++num;
			dp[i][j + 1] += comb[j][num];
			if (dp[i][j + 1] >= mod) dp[i][j + 1] -= mod;
		}
		for (int j = 0; j < c - 1; ++j) {
			dp[i][j + 1] += dp[i][j];
			if (dp[i][j + 1] >= mod) dp[i][j + 1] -= mod;
		}
		ans += dp[i][c - 1];
		if (ans >= mod) ans -= mod;
	}
	cout << ans << '\n';
	return 0;
}

Subtask #1
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	16 ms	4348 KB	Output is correct
2	Correct	16 ms	4584 KB	Output is correct
3	Correct	15 ms	4640 KB	Output is correct
4	Correct	15 ms	4640 KB	Output is correct
5	Correct	17 ms	4640 KB	Output is correct
6	Correct	16 ms	4640 KB	Output is correct
7	Correct	15 ms	4640 KB	Output is correct
8	Correct	15 ms	4640 KB	Output is correct
9	Correct	15 ms	4640 KB	Output is correct
10	Correct	15 ms	4640 KB	Output is correct
11	Correct	15 ms	4640 KB	Output is correct
12	Correct	15 ms	4640 KB	Output is correct
13	Correct	15 ms	4640 KB	Output is correct
14	Correct	15 ms	4640 KB	Output is correct
15	Correct	15 ms	4640 KB	Output is correct
16	Correct	7 ms	4640 KB	Output is correct
17	Correct	7 ms	4640 KB	Output is correct
18	Correct	7 ms	4640 KB	Output is correct
19	Correct	8 ms	4640 KB	Output is correct
20	Correct	7 ms	4640 KB	Output is correct

Subtask #2
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	16 ms	4348 KB	Output is correct
2	Correct	16 ms	4584 KB	Output is correct
3	Correct	15 ms	4640 KB	Output is correct
4	Correct	15 ms	4640 KB	Output is correct
5	Correct	17 ms	4640 KB	Output is correct
6	Correct	16 ms	4640 KB	Output is correct
7	Correct	15 ms	4640 KB	Output is correct
8	Correct	15 ms	4640 KB	Output is correct
9	Correct	15 ms	4640 KB	Output is correct
10	Correct	15 ms	4640 KB	Output is correct
11	Correct	15 ms	4640 KB	Output is correct
12	Correct	15 ms	4640 KB	Output is correct
13	Correct	15 ms	4640 KB	Output is correct
14	Correct	15 ms	4640 KB	Output is correct
15	Correct	15 ms	4640 KB	Output is correct
16	Correct	7 ms	4640 KB	Output is correct
17	Correct	7 ms	4640 KB	Output is correct
18	Correct	7 ms	4640 KB	Output is correct
19	Correct	8 ms	4640 KB	Output is correct
20	Correct	7 ms	4640 KB	Output is correct
21	Correct	262 ms	4640 KB	Output is correct
22	Correct	251 ms	4640 KB	Output is correct
23	Correct	249 ms	4640 KB	Output is correct
24	Correct	253 ms	4640 KB	Output is correct
25	Correct	263 ms	4640 KB	Output is correct
26	Correct	362 ms	4640 KB	Output is correct
27	Correct	378 ms	4640 KB	Output is correct
28	Correct	360 ms	4640 KB	Output is correct
29	Correct	356 ms	4640 KB	Output is correct
30	Correct	18 ms	4640 KB	Output is correct
31	Correct	17 ms	4640 KB	Output is correct
32	Correct	18 ms	4640 KB	Output is correct
33	Correct	17 ms	4640 KB	Output is correct
34	Correct	16 ms	4640 KB	Output is correct
35	Correct	17 ms	4640 KB	Output is correct
36	Correct	17 ms	4640 KB	Output is correct
37	Correct	17 ms	4640 KB	Output is correct
38	Correct	17 ms	4640 KB	Output is correct

Subtask #3
27.0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Correct	5 ms	4640 KB	Output is correct
2	Correct	4 ms	4640 KB	Output is correct
3	Correct	4 ms	4640 KB	Output is correct
4	Correct	5 ms	4640 KB	Output is correct
5	Correct	5 ms	4640 KB	Output is correct
6	Correct	6 ms	4640 KB	Output is correct
7	Correct	7 ms	4640 KB	Output is correct
8	Correct	6 ms	4640 KB	Output is correct
9	Correct	6 ms	4640 KB	Output is correct
10	Correct	6 ms	4640 KB	Output is correct
11	Correct	5 ms	4640 KB	Output is correct
12	Correct	4 ms	4640 KB	Output is correct
13	Correct	4 ms	4640 KB	Output is correct
14	Correct	5 ms	4640 KB	Output is correct
15	Correct	4 ms	4640 KB	Output is correct
16	Correct	4 ms	4640 KB	Output is correct
17	Correct	4 ms	4640 KB	Output is correct
18	Correct	4 ms	4640 KB	Output is correct
19	Correct	4 ms	4640 KB	Output is correct
20	Correct	4 ms	4640 KB	Output is correct

Subtask #4
42.0 / 42.0

#	결과	실행 시간	메모리	Grader output
1	Correct	16 ms	4348 KB	Output is correct
2	Correct	16 ms	4584 KB	Output is correct
3	Correct	15 ms	4640 KB	Output is correct
4	Correct	15 ms	4640 KB	Output is correct
5	Correct	17 ms	4640 KB	Output is correct
6	Correct	16 ms	4640 KB	Output is correct
7	Correct	15 ms	4640 KB	Output is correct
8	Correct	15 ms	4640 KB	Output is correct
9	Correct	15 ms	4640 KB	Output is correct
10	Correct	15 ms	4640 KB	Output is correct
11	Correct	15 ms	4640 KB	Output is correct
12	Correct	15 ms	4640 KB	Output is correct
13	Correct	15 ms	4640 KB	Output is correct
14	Correct	15 ms	4640 KB	Output is correct
15	Correct	15 ms	4640 KB	Output is correct
16	Correct	7 ms	4640 KB	Output is correct
17	Correct	7 ms	4640 KB	Output is correct
18	Correct	7 ms	4640 KB	Output is correct
19	Correct	8 ms	4640 KB	Output is correct
20	Correct	7 ms	4640 KB	Output is correct
21	Correct	262 ms	4640 KB	Output is correct
22	Correct	251 ms	4640 KB	Output is correct
23	Correct	249 ms	4640 KB	Output is correct
24	Correct	253 ms	4640 KB	Output is correct
25	Correct	263 ms	4640 KB	Output is correct
26	Correct	362 ms	4640 KB	Output is correct
27	Correct	378 ms	4640 KB	Output is correct
28	Correct	360 ms	4640 KB	Output is correct
29	Correct	356 ms	4640 KB	Output is correct
30	Correct	18 ms	4640 KB	Output is correct
31	Correct	17 ms	4640 KB	Output is correct
32	Correct	18 ms	4640 KB	Output is correct
33	Correct	17 ms	4640 KB	Output is correct
34	Correct	16 ms	4640 KB	Output is correct
35	Correct	17 ms	4640 KB	Output is correct
36	Correct	17 ms	4640 KB	Output is correct
37	Correct	17 ms	4640 KB	Output is correct
38	Correct	17 ms	4640 KB	Output is correct
39	Correct	5 ms	4640 KB	Output is correct
40	Correct	4 ms	4640 KB	Output is correct
41	Correct	4 ms	4640 KB	Output is correct
42	Correct	5 ms	4640 KB	Output is correct
43	Correct	5 ms	4640 KB	Output is correct
44	Correct	6 ms	4640 KB	Output is correct
45	Correct	7 ms	4640 KB	Output is correct
46	Correct	6 ms	4640 KB	Output is correct
47	Correct	6 ms	4640 KB	Output is correct
48	Correct	6 ms	4640 KB	Output is correct
49	Correct	5 ms	4640 KB	Output is correct
50	Correct	4 ms	4640 KB	Output is correct
51	Correct	4 ms	4640 KB	Output is correct
52	Correct	5 ms	4640 KB	Output is correct
53	Correct	4 ms	4640 KB	Output is correct
54	Correct	4 ms	4640 KB	Output is correct
55	Correct	4 ms	4640 KB	Output is correct
56	Correct	4 ms	4640 KB	Output is correct
57	Correct	4 ms	4640 KB	Output is correct
58	Correct	4 ms	4640 KB	Output is correct
59	Correct	294 ms	4640 KB	Output is correct
60	Correct	283 ms	4640 KB	Output is correct
61	Correct	257 ms	4640 KB	Output is correct
62	Correct	304 ms	4640 KB	Output is correct
63	Correct	285 ms	4640 KB	Output is correct
64	Correct	411 ms	4720 KB	Output is correct
65	Correct	417 ms	4720 KB	Output is correct
66	Correct	442 ms	4720 KB	Output is correct
67	Correct	430 ms	4720 KB	Output is correct
68	Correct	423 ms	4720 KB	Output is correct
69	Correct	231 ms	4720 KB	Output is correct
70	Correct	231 ms	4720 KB	Output is correct
71	Correct	219 ms	4720 KB	Output is correct
72	Correct	231 ms	4720 KB	Output is correct
73	Correct	229 ms	4724 KB	Output is correct
74	Correct	60 ms	4724 KB	Output is correct
75	Correct	65 ms	4724 KB	Output is correct
76	Correct	61 ms	4724 KB	Output is correct
77	Correct	60 ms	4724 KB	Output is correct
78	Correct	62 ms	4724 KB	Output is correct

답안 #47662

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