답안 #48617 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
48617	2018-05-17T11:35:48 Z	nobik	Boat (APIO16_boat)	C++14	58 / 100	2000 ms	5216 KB

boat

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

#define REP(i, n) for (int i = 0; i < (n); ++i)
#define SIZE(a) ((int)(a).size())
#define ALL(a) (a).begin(), (a).end()

using ll = long long;
using K = long double;

const int inf = 1000*1000*1000 + 7;
const int mod = 1000*1000*1000 + 7;
const int N = 1005;

int power(int a, int n) {
	int result = 1;
	while (n > 0) {
		if (n % 2) {
			result = (1LL*result*a) % mod;
		}
		a = (1LL*a*a) % mod;
		n /= 2;
	}
	return result;
}

int inv(int a) {
	return power(a, mod-2);
}

void add(int &x, int y) {
	x += y;
	if (x >= mod) x -= mod;
}

int n, m, l[N], r[N];
vector<int> d;
int f[N][N], g[N][N];

int inside(int id, int piece) {
	return l[id] <= d[piece] && r[id] >= d[piece+1];
}

int iv[N];

int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	
	cin >> n;
	REP(i, n) {
		cin >> l[i] >> r[i];
		++r[i];
		d.push_back(l[i]);
		d.push_back(r[i]);
	}
	sort(d.begin(), d.end());
	d.erase(unique(d.begin(), d.end()), d.end());
	m = SIZE(d)-1;
	f[0][0] = 1;
	for (int i = 1; i <= n; ++i) {
		iv[i] = inv(i);
	}
	for (int i = 0; i <= n; ++i) REP(w, m) {
		int len = d[w+1]-d[w];
		int first = len;
		int second = 1;
		for (int j = 0; j <= i; ++j) {
			first = 1LL*first*(len-j-1) % mod;
			first = 1LL*first*iv[j+2] % mod;
			add(g[i][w], 1LL*first*second % mod);
			second = 1LL*second*(i-j) % mod;
			second = 1LL*second*iv[j+1] % mod;
		}
	}
	REP(i, n) {
		REP(j, m+1) add(f[i+1][j], f[i][j]);
		REP(j, m) {
			add(f[i][j+1], f[i][j]);
			if (!inside(i, j)) continue;
			add(f[i+1][j+1], 1LL*f[i][j]*(d[j+1]-d[j]) % mod);
			int cnt = -1;
			for (int nxt = i+1; nxt < n; ++nxt) {
				if (!inside(nxt, j)) continue;
				++cnt;
				add(f[nxt+1][j+1], 1LL*f[i][j]*g[cnt][j] % mod);
			}
		}
	}
	int result = mod-1;
	REP(i, m+1) add(result, f[n][i]);
	cout << result << '\n';
}

Subtask #1
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1880 ms	4552 KB	Output is correct
2	Correct	1879 ms	4552 KB	Output is correct
3	Correct	1904 ms	4552 KB	Output is correct
4	Correct	1820 ms	4552 KB	Output is correct
5	Correct	1875 ms	4676 KB	Output is correct
6	Correct	1889 ms	4740 KB	Output is correct
7	Correct	1834 ms	4740 KB	Output is correct
8	Correct	1884 ms	4820 KB	Output is correct
9	Correct	1831 ms	4820 KB	Output is correct
10	Correct	1871 ms	4820 KB	Output is correct
11	Correct	1889 ms	4820 KB	Output is correct
12	Correct	1936 ms	4820 KB	Output is correct
13	Correct	1875 ms	4820 KB	Output is correct
14	Correct	1868 ms	4820 KB	Output is correct
15	Correct	1867 ms	4820 KB	Output is correct
16	Correct	349 ms	4820 KB	Output is correct
17	Correct	351 ms	4820 KB	Output is correct
18	Correct	342 ms	4908 KB	Output is correct
19	Correct	385 ms	4908 KB	Output is correct
20	Correct	340 ms	4908 KB	Output is correct

Subtask #2
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1880 ms	4552 KB	Output is correct
2	Correct	1879 ms	4552 KB	Output is correct
3	Correct	1904 ms	4552 KB	Output is correct
4	Correct	1820 ms	4552 KB	Output is correct
5	Correct	1875 ms	4676 KB	Output is correct
6	Correct	1889 ms	4740 KB	Output is correct
7	Correct	1834 ms	4740 KB	Output is correct
8	Correct	1884 ms	4820 KB	Output is correct
9	Correct	1831 ms	4820 KB	Output is correct
10	Correct	1871 ms	4820 KB	Output is correct
11	Correct	1889 ms	4820 KB	Output is correct
12	Correct	1936 ms	4820 KB	Output is correct
13	Correct	1875 ms	4820 KB	Output is correct
14	Correct	1868 ms	4820 KB	Output is correct
15	Correct	1867 ms	4820 KB	Output is correct
16	Correct	349 ms	4820 KB	Output is correct
17	Correct	351 ms	4820 KB	Output is correct
18	Correct	342 ms	4908 KB	Output is correct
19	Correct	385 ms	4908 KB	Output is correct
20	Correct	340 ms	4908 KB	Output is correct
21	Correct	1887 ms	4908 KB	Output is correct
22	Correct	1956 ms	4908 KB	Output is correct
23	Correct	1962 ms	4908 KB	Output is correct
24	Correct	1843 ms	4908 KB	Output is correct
25	Correct	1826 ms	4908 KB	Output is correct
26	Correct	1931 ms	5004 KB	Output is correct
27	Correct	1972 ms	5004 KB	Output is correct
28	Correct	1842 ms	5004 KB	Output is correct
29	Correct	1828 ms	5212 KB	Output is correct
30	Correct	1794 ms	5212 KB	Output is correct
31	Correct	1788 ms	5212 KB	Output is correct
32	Correct	1859 ms	5212 KB	Output is correct
33	Correct	1822 ms	5212 KB	Output is correct
34	Correct	1786 ms	5212 KB	Output is correct
35	Correct	1815 ms	5216 KB	Output is correct
36	Correct	1817 ms	5216 KB	Output is correct
37	Correct	1809 ms	5216 KB	Output is correct
38	Correct	1889 ms	5216 KB	Output is correct

Subtask #3
27.0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Correct	19 ms	5216 KB	Output is correct
2	Correct	18 ms	5216 KB	Output is correct
3	Correct	19 ms	5216 KB	Output is correct
4	Correct	19 ms	5216 KB	Output is correct
5	Correct	27 ms	5216 KB	Output is correct
6	Correct	21 ms	5216 KB	Output is correct
7	Correct	20 ms	5216 KB	Output is correct
8	Correct	20 ms	5216 KB	Output is correct
9	Correct	21 ms	5216 KB	Output is correct
10	Correct	21 ms	5216 KB	Output is correct
11	Correct	20 ms	5216 KB	Output is correct
12	Correct	19 ms	5216 KB	Output is correct
13	Correct	22 ms	5216 KB	Output is correct
14	Correct	19 ms	5216 KB	Output is correct
15	Correct	19 ms	5216 KB	Output is correct
16	Correct	13 ms	5216 KB	Output is correct
17	Correct	12 ms	5216 KB	Output is correct
18	Correct	17 ms	5216 KB	Output is correct
19	Correct	13 ms	5216 KB	Output is correct
20	Correct	12 ms	5216 KB	Output is correct

Subtask #4
0 / 42.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1880 ms	4552 KB	Output is correct
2	Correct	1879 ms	4552 KB	Output is correct
3	Correct	1904 ms	4552 KB	Output is correct
4	Correct	1820 ms	4552 KB	Output is correct
5	Correct	1875 ms	4676 KB	Output is correct
6	Correct	1889 ms	4740 KB	Output is correct
7	Correct	1834 ms	4740 KB	Output is correct
8	Correct	1884 ms	4820 KB	Output is correct
9	Correct	1831 ms	4820 KB	Output is correct
10	Correct	1871 ms	4820 KB	Output is correct
11	Correct	1889 ms	4820 KB	Output is correct
12	Correct	1936 ms	4820 KB	Output is correct
13	Correct	1875 ms	4820 KB	Output is correct
14	Correct	1868 ms	4820 KB	Output is correct
15	Correct	1867 ms	4820 KB	Output is correct
16	Correct	349 ms	4820 KB	Output is correct
17	Correct	351 ms	4820 KB	Output is correct
18	Correct	342 ms	4908 KB	Output is correct
19	Correct	385 ms	4908 KB	Output is correct
20	Correct	340 ms	4908 KB	Output is correct
21	Correct	1887 ms	4908 KB	Output is correct
22	Correct	1956 ms	4908 KB	Output is correct
23	Correct	1962 ms	4908 KB	Output is correct
24	Correct	1843 ms	4908 KB	Output is correct
25	Correct	1826 ms	4908 KB	Output is correct
26	Correct	1931 ms	5004 KB	Output is correct
27	Correct	1972 ms	5004 KB	Output is correct
28	Correct	1842 ms	5004 KB	Output is correct
29	Correct	1828 ms	5212 KB	Output is correct
30	Correct	1794 ms	5212 KB	Output is correct
31	Correct	1788 ms	5212 KB	Output is correct
32	Correct	1859 ms	5212 KB	Output is correct
33	Correct	1822 ms	5212 KB	Output is correct
34	Correct	1786 ms	5212 KB	Output is correct
35	Correct	1815 ms	5216 KB	Output is correct
36	Correct	1817 ms	5216 KB	Output is correct
37	Correct	1809 ms	5216 KB	Output is correct
38	Correct	1889 ms	5216 KB	Output is correct
39	Correct	19 ms	5216 KB	Output is correct
40	Correct	18 ms	5216 KB	Output is correct
41	Correct	19 ms	5216 KB	Output is correct
42	Correct	19 ms	5216 KB	Output is correct
43	Correct	27 ms	5216 KB	Output is correct
44	Correct	21 ms	5216 KB	Output is correct
45	Correct	20 ms	5216 KB	Output is correct
46	Correct	20 ms	5216 KB	Output is correct
47	Correct	21 ms	5216 KB	Output is correct
48	Correct	21 ms	5216 KB	Output is correct
49	Correct	20 ms	5216 KB	Output is correct
50	Correct	19 ms	5216 KB	Output is correct
51	Correct	22 ms	5216 KB	Output is correct
52	Correct	19 ms	5216 KB	Output is correct
53	Correct	19 ms	5216 KB	Output is correct
54	Correct	13 ms	5216 KB	Output is correct
55	Correct	12 ms	5216 KB	Output is correct
56	Correct	17 ms	5216 KB	Output is correct
57	Correct	13 ms	5216 KB	Output is correct
58	Correct	12 ms	5216 KB	Output is correct
59	Execution timed out	2029 ms	5216 KB	Time limit exceeded
60	Halted	0 ms	0 KB	-

답안 #48617

Compilation message

Subtask #1 9.0 / 9.0

Subtask #2 22.0 / 22.0

Subtask #3 27.0 / 27.0

Subtask #4 0 / 42.0

Subtask #1
9.0 / 9.0

Subtask #2
22.0 / 22.0

Subtask #3
27.0 / 27.0

Subtask #4
0 / 42.0