답안 #47504 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
47504	2018-05-03T23:10:34 Z	jun6873	Boat (APIO16_boat)	C++11	100 / 100	1548 ms	5616 KB

boat

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

int n, a[504], b[504], cn, mi[504], c[1004], num[1004], m[1004][504], s0[1004], s[1004][504];

const int mod = 1000000007;
int sum(int x, int y) { return (x+y) % mod; }
int mul(int x, int y) { return (x*(long long)y) % mod; }
int power(int x, int k) {
	if (!k) return 1;
	if (k&1) return mul(x, power(x, k-1));
	int r = power(x, k/2); return mul(r, r);
}

int main() {
	cin >> n;
	for (int i=0; i<n; i++) cin >> a[i] >> b[i];
	for (int i=0; i<n; i++) c[2*i] = a[i], c[2*i+1] = b[i]+1;

	sort(c, c+2*n+1);
	cn = unique(c, c+2*n+1) - c;
	for (int i=0; i<n; i++) {
		a[i] = lower_bound(c, c+cn, a[i]) - c;
		b[i] = lower_bound(c, c+cn, b[i]+1) - c;
	}

	for (int i=1; i<504; i++) mi[i] = power(i, mod-2);

	s0[0] = 1;
	s[0][1] = 1; num[0] = 1;
	int ans = 0;
	for (int i=0; i<n; i++) {
		memset(m, 0, sizeof(m));
		for (int j=a[i]; j<b[i]; j++) num[j]++;
		for (int j=a[i]; j<b[i]; j++) for (int jb=0; jb<j; jb++) m[j][1] = sum(m[j][1], mul(c[j+1]-c[j], s0[jb]));
		for (int j=a[i]; j<b[i]; j++) for (int k=2; k<=num[j]; k++) m[j][k] = mul(mul(max(0, c[j+1]-c[j]-k+1), mi[k]), s[j][k-1]);

		for (int j=a[i]; j<b[i]; j++) for (int k=1; k<=num[j]; k++) ans = sum(ans, m[j][k]);
		for (int j=0; j<cn; j++) for (int k=1; k<=num[j]; k++) s0[j] = sum(s0[j], m[j][k]);
		for (int j=0; j<cn; j++) for (int k=1; k<=num[j]; k++) s[j][k] = sum(s[j][k], m[j][k]);
	}

	cout << ans;
}

Subtask #1
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	65 ms	4344 KB	Output is correct
2	Correct	60 ms	4400 KB	Output is correct
3	Correct	60 ms	4416 KB	Output is correct
4	Correct	62 ms	4488 KB	Output is correct
5	Correct	59 ms	4548 KB	Output is correct
6	Correct	59 ms	4560 KB	Output is correct
7	Correct	62 ms	4680 KB	Output is correct
8	Correct	64 ms	4820 KB	Output is correct
9	Correct	62 ms	4820 KB	Output is correct
10	Correct	64 ms	4840 KB	Output is correct
11	Correct	61 ms	4840 KB	Output is correct
12	Correct	59 ms	4840 KB	Output is correct
13	Correct	59 ms	4840 KB	Output is correct
14	Correct	63 ms	4840 KB	Output is correct
15	Correct	59 ms	4844 KB	Output is correct
16	Correct	54 ms	4844 KB	Output is correct
17	Correct	55 ms	4844 KB	Output is correct
18	Correct	55 ms	4844 KB	Output is correct
19	Correct	56 ms	4844 KB	Output is correct
20	Correct	55 ms	4844 KB	Output is correct

Subtask #2
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	65 ms	4344 KB	Output is correct
2	Correct	60 ms	4400 KB	Output is correct
3	Correct	60 ms	4416 KB	Output is correct
4	Correct	62 ms	4488 KB	Output is correct
5	Correct	59 ms	4548 KB	Output is correct
6	Correct	59 ms	4560 KB	Output is correct
7	Correct	62 ms	4680 KB	Output is correct
8	Correct	64 ms	4820 KB	Output is correct
9	Correct	62 ms	4820 KB	Output is correct
10	Correct	64 ms	4840 KB	Output is correct
11	Correct	61 ms	4840 KB	Output is correct
12	Correct	59 ms	4840 KB	Output is correct
13	Correct	59 ms	4840 KB	Output is correct
14	Correct	63 ms	4840 KB	Output is correct
15	Correct	59 ms	4844 KB	Output is correct
16	Correct	54 ms	4844 KB	Output is correct
17	Correct	55 ms	4844 KB	Output is correct
18	Correct	55 ms	4844 KB	Output is correct
19	Correct	56 ms	4844 KB	Output is correct
20	Correct	55 ms	4844 KB	Output is correct
21	Correct	843 ms	4844 KB	Output is correct
22	Correct	837 ms	4860 KB	Output is correct
23	Correct	778 ms	4884 KB	Output is correct
24	Correct	817 ms	5020 KB	Output is correct
25	Correct	854 ms	5020 KB	Output is correct
26	Correct	1257 ms	5020 KB	Output is correct
27	Correct	1323 ms	5044 KB	Output is correct
28	Correct	1299 ms	5044 KB	Output is correct
29	Correct	1299 ms	5044 KB	Output is correct
30	Correct	66 ms	5068 KB	Output is correct
31	Correct	62 ms	5080 KB	Output is correct
32	Correct	66 ms	5080 KB	Output is correct
33	Correct	66 ms	5104 KB	Output is correct
34	Correct	66 ms	5108 KB	Output is correct
35	Correct	66 ms	5124 KB	Output is correct
36	Correct	62 ms	5140 KB	Output is correct
37	Correct	64 ms	5268 KB	Output is correct
38	Correct	62 ms	5268 KB	Output is correct

Subtask #3
27.0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Correct	21 ms	5268 KB	Output is correct
2	Correct	19 ms	5268 KB	Output is correct
3	Correct	20 ms	5268 KB	Output is correct
4	Correct	20 ms	5268 KB	Output is correct
5	Correct	21 ms	5268 KB	Output is correct
6	Correct	26 ms	5268 KB	Output is correct
7	Correct	25 ms	5268 KB	Output is correct
8	Correct	25 ms	5268 KB	Output is correct
9	Correct	25 ms	5268 KB	Output is correct
10	Correct	25 ms	5268 KB	Output is correct
11	Correct	21 ms	5268 KB	Output is correct
12	Correct	20 ms	5268 KB	Output is correct
13	Correct	22 ms	5268 KB	Output is correct
14	Correct	21 ms	5268 KB	Output is correct
15	Correct	23 ms	5268 KB	Output is correct
16	Correct	18 ms	5268 KB	Output is correct
17	Correct	17 ms	5268 KB	Output is correct
18	Correct	17 ms	5268 KB	Output is correct
19	Correct	17 ms	5268 KB	Output is correct
20	Correct	17 ms	5268 KB	Output is correct

Subtask #4
42.0 / 42.0

#	결과	실행 시간	메모리	Grader output
1	Correct	65 ms	4344 KB	Output is correct
2	Correct	60 ms	4400 KB	Output is correct
3	Correct	60 ms	4416 KB	Output is correct
4	Correct	62 ms	4488 KB	Output is correct
5	Correct	59 ms	4548 KB	Output is correct
6	Correct	59 ms	4560 KB	Output is correct
7	Correct	62 ms	4680 KB	Output is correct
8	Correct	64 ms	4820 KB	Output is correct
9	Correct	62 ms	4820 KB	Output is correct
10	Correct	64 ms	4840 KB	Output is correct
11	Correct	61 ms	4840 KB	Output is correct
12	Correct	59 ms	4840 KB	Output is correct
13	Correct	59 ms	4840 KB	Output is correct
14	Correct	63 ms	4840 KB	Output is correct
15	Correct	59 ms	4844 KB	Output is correct
16	Correct	54 ms	4844 KB	Output is correct
17	Correct	55 ms	4844 KB	Output is correct
18	Correct	55 ms	4844 KB	Output is correct
19	Correct	56 ms	4844 KB	Output is correct
20	Correct	55 ms	4844 KB	Output is correct
21	Correct	843 ms	4844 KB	Output is correct
22	Correct	837 ms	4860 KB	Output is correct
23	Correct	778 ms	4884 KB	Output is correct
24	Correct	817 ms	5020 KB	Output is correct
25	Correct	854 ms	5020 KB	Output is correct
26	Correct	1257 ms	5020 KB	Output is correct
27	Correct	1323 ms	5044 KB	Output is correct
28	Correct	1299 ms	5044 KB	Output is correct
29	Correct	1299 ms	5044 KB	Output is correct
30	Correct	66 ms	5068 KB	Output is correct
31	Correct	62 ms	5080 KB	Output is correct
32	Correct	66 ms	5080 KB	Output is correct
33	Correct	66 ms	5104 KB	Output is correct
34	Correct	66 ms	5108 KB	Output is correct
35	Correct	66 ms	5124 KB	Output is correct
36	Correct	62 ms	5140 KB	Output is correct
37	Correct	64 ms	5268 KB	Output is correct
38	Correct	62 ms	5268 KB	Output is correct
39	Correct	21 ms	5268 KB	Output is correct
40	Correct	19 ms	5268 KB	Output is correct
41	Correct	20 ms	5268 KB	Output is correct
42	Correct	20 ms	5268 KB	Output is correct
43	Correct	21 ms	5268 KB	Output is correct
44	Correct	26 ms	5268 KB	Output is correct
45	Correct	25 ms	5268 KB	Output is correct
46	Correct	25 ms	5268 KB	Output is correct
47	Correct	25 ms	5268 KB	Output is correct
48	Correct	25 ms	5268 KB	Output is correct
49	Correct	21 ms	5268 KB	Output is correct
50	Correct	20 ms	5268 KB	Output is correct
51	Correct	22 ms	5268 KB	Output is correct
52	Correct	21 ms	5268 KB	Output is correct
53	Correct	23 ms	5268 KB	Output is correct
54	Correct	18 ms	5268 KB	Output is correct
55	Correct	17 ms	5268 KB	Output is correct
56	Correct	17 ms	5268 KB	Output is correct
57	Correct	17 ms	5268 KB	Output is correct
58	Correct	17 ms	5268 KB	Output is correct
59	Correct	965 ms	5416 KB	Output is correct
60	Correct	911 ms	5420 KB	Output is correct
61	Correct	892 ms	5420 KB	Output is correct
62	Correct	991 ms	5420 KB	Output is correct
63	Correct	946 ms	5420 KB	Output is correct
64	Correct	1518 ms	5420 KB	Output is correct
65	Correct	1548 ms	5616 KB	Output is correct
66	Correct	1517 ms	5616 KB	Output is correct
67	Correct	1531 ms	5616 KB	Output is correct
68	Correct	1521 ms	5616 KB	Output is correct
69	Correct	930 ms	5616 KB	Output is correct
70	Correct	949 ms	5616 KB	Output is correct
71	Correct	951 ms	5616 KB	Output is correct
72	Correct	986 ms	5616 KB	Output is correct
73	Correct	970 ms	5616 KB	Output is correct
74	Correct	156 ms	5616 KB	Output is correct
75	Correct	171 ms	5616 KB	Output is correct
76	Correct	158 ms	5616 KB	Output is correct
77	Correct	159 ms	5616 KB	Output is correct
78	Correct	157 ms	5616 KB	Output is correct

답안 #47504

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