답안 #48618 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
48618	2018-05-17T11:39:39 Z	nobik	Boat (APIO16_boat)	C++14	58 / 100	2000 ms	8852 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 c[N][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);
	}
	REP(i, N) {
		c[i][0] = c[i][i] = 1;
		for (int j = 1; j < i; ++j) {
			add(c[i][j], c[i-1][j-1]);
			add(c[i][j], c[i-1][j]);
		}
	}
	for (int i = 0; i <= n; ++i) REP(w, m) {
		int len = d[w+1]-d[w];
		int first = len;
		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*c[i][j] % 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	1791 ms	8448 KB	Output is correct
2	Correct	1741 ms	8448 KB	Output is correct
3	Correct	1785 ms	8448 KB	Output is correct
4	Correct	1753 ms	8556 KB	Output is correct
5	Correct	1712 ms	8556 KB	Output is correct
6	Correct	1769 ms	8580 KB	Output is correct
7	Correct	1746 ms	8580 KB	Output is correct
8	Correct	1755 ms	8580 KB	Output is correct
9	Correct	1770 ms	8608 KB	Output is correct
10	Correct	1774 ms	8624 KB	Output is correct
11	Correct	1726 ms	8624 KB	Output is correct
12	Correct	1747 ms	8624 KB	Output is correct
13	Correct	1759 ms	8624 KB	Output is correct
14	Correct	1770 ms	8624 KB	Output is correct
15	Correct	1780 ms	8624 KB	Output is correct
16	Correct	310 ms	8624 KB	Output is correct
17	Correct	335 ms	8624 KB	Output is correct
18	Correct	325 ms	8624 KB	Output is correct
19	Correct	333 ms	8624 KB	Output is correct
20	Correct	354 ms	8624 KB	Output is correct

Subtask #2
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1791 ms	8448 KB	Output is correct
2	Correct	1741 ms	8448 KB	Output is correct
3	Correct	1785 ms	8448 KB	Output is correct
4	Correct	1753 ms	8556 KB	Output is correct
5	Correct	1712 ms	8556 KB	Output is correct
6	Correct	1769 ms	8580 KB	Output is correct
7	Correct	1746 ms	8580 KB	Output is correct
8	Correct	1755 ms	8580 KB	Output is correct
9	Correct	1770 ms	8608 KB	Output is correct
10	Correct	1774 ms	8624 KB	Output is correct
11	Correct	1726 ms	8624 KB	Output is correct
12	Correct	1747 ms	8624 KB	Output is correct
13	Correct	1759 ms	8624 KB	Output is correct
14	Correct	1770 ms	8624 KB	Output is correct
15	Correct	1780 ms	8624 KB	Output is correct
16	Correct	310 ms	8624 KB	Output is correct
17	Correct	335 ms	8624 KB	Output is correct
18	Correct	325 ms	8624 KB	Output is correct
19	Correct	333 ms	8624 KB	Output is correct
20	Correct	354 ms	8624 KB	Output is correct
21	Correct	1697 ms	8728 KB	Output is correct
22	Correct	1734 ms	8728 KB	Output is correct
23	Correct	1724 ms	8728 KB	Output is correct
24	Correct	1752 ms	8728 KB	Output is correct
25	Correct	1722 ms	8728 KB	Output is correct
26	Correct	1759 ms	8828 KB	Output is correct
27	Correct	1792 ms	8828 KB	Output is correct
28	Correct	1747 ms	8828 KB	Output is correct
29	Correct	1785 ms	8828 KB	Output is correct
30	Correct	1726 ms	8828 KB	Output is correct
31	Correct	1715 ms	8828 KB	Output is correct
32	Correct	1699 ms	8828 KB	Output is correct
33	Correct	1776 ms	8828 KB	Output is correct
34	Correct	1749 ms	8828 KB	Output is correct
35	Correct	1759 ms	8828 KB	Output is correct
36	Correct	1756 ms	8828 KB	Output is correct
37	Correct	1789 ms	8828 KB	Output is correct
38	Correct	1762 ms	8828 KB	Output is correct

Subtask #3
27.0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Correct	22 ms	8828 KB	Output is correct
2	Correct	21 ms	8828 KB	Output is correct
3	Correct	22 ms	8828 KB	Output is correct
4	Correct	21 ms	8828 KB	Output is correct
5	Correct	21 ms	8828 KB	Output is correct
6	Correct	22 ms	8828 KB	Output is correct
7	Correct	22 ms	8828 KB	Output is correct
8	Correct	22 ms	8828 KB	Output is correct
9	Correct	44 ms	8828 KB	Output is correct
10	Correct	23 ms	8828 KB	Output is correct
11	Correct	22 ms	8828 KB	Output is correct
12	Correct	22 ms	8828 KB	Output is correct
13	Correct	23 ms	8828 KB	Output is correct
14	Correct	22 ms	8828 KB	Output is correct
15	Correct	21 ms	8828 KB	Output is correct
16	Correct	18 ms	8828 KB	Output is correct
17	Correct	17 ms	8828 KB	Output is correct
18	Correct	16 ms	8828 KB	Output is correct
19	Correct	15 ms	8828 KB	Output is correct
20	Correct	14 ms	8828 KB	Output is correct

Subtask #4
0 / 42.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1791 ms	8448 KB	Output is correct
2	Correct	1741 ms	8448 KB	Output is correct
3	Correct	1785 ms	8448 KB	Output is correct
4	Correct	1753 ms	8556 KB	Output is correct
5	Correct	1712 ms	8556 KB	Output is correct
6	Correct	1769 ms	8580 KB	Output is correct
7	Correct	1746 ms	8580 KB	Output is correct
8	Correct	1755 ms	8580 KB	Output is correct
9	Correct	1770 ms	8608 KB	Output is correct
10	Correct	1774 ms	8624 KB	Output is correct
11	Correct	1726 ms	8624 KB	Output is correct
12	Correct	1747 ms	8624 KB	Output is correct
13	Correct	1759 ms	8624 KB	Output is correct
14	Correct	1770 ms	8624 KB	Output is correct
15	Correct	1780 ms	8624 KB	Output is correct
16	Correct	310 ms	8624 KB	Output is correct
17	Correct	335 ms	8624 KB	Output is correct
18	Correct	325 ms	8624 KB	Output is correct
19	Correct	333 ms	8624 KB	Output is correct
20	Correct	354 ms	8624 KB	Output is correct
21	Correct	1697 ms	8728 KB	Output is correct
22	Correct	1734 ms	8728 KB	Output is correct
23	Correct	1724 ms	8728 KB	Output is correct
24	Correct	1752 ms	8728 KB	Output is correct
25	Correct	1722 ms	8728 KB	Output is correct
26	Correct	1759 ms	8828 KB	Output is correct
27	Correct	1792 ms	8828 KB	Output is correct
28	Correct	1747 ms	8828 KB	Output is correct
29	Correct	1785 ms	8828 KB	Output is correct
30	Correct	1726 ms	8828 KB	Output is correct
31	Correct	1715 ms	8828 KB	Output is correct
32	Correct	1699 ms	8828 KB	Output is correct
33	Correct	1776 ms	8828 KB	Output is correct
34	Correct	1749 ms	8828 KB	Output is correct
35	Correct	1759 ms	8828 KB	Output is correct
36	Correct	1756 ms	8828 KB	Output is correct
37	Correct	1789 ms	8828 KB	Output is correct
38	Correct	1762 ms	8828 KB	Output is correct
39	Correct	22 ms	8828 KB	Output is correct
40	Correct	21 ms	8828 KB	Output is correct
41	Correct	22 ms	8828 KB	Output is correct
42	Correct	21 ms	8828 KB	Output is correct
43	Correct	21 ms	8828 KB	Output is correct
44	Correct	22 ms	8828 KB	Output is correct
45	Correct	22 ms	8828 KB	Output is correct
46	Correct	22 ms	8828 KB	Output is correct
47	Correct	44 ms	8828 KB	Output is correct
48	Correct	23 ms	8828 KB	Output is correct
49	Correct	22 ms	8828 KB	Output is correct
50	Correct	22 ms	8828 KB	Output is correct
51	Correct	23 ms	8828 KB	Output is correct
52	Correct	22 ms	8828 KB	Output is correct
53	Correct	21 ms	8828 KB	Output is correct
54	Correct	18 ms	8828 KB	Output is correct
55	Correct	17 ms	8828 KB	Output is correct
56	Correct	16 ms	8828 KB	Output is correct
57	Correct	15 ms	8828 KB	Output is correct
58	Correct	14 ms	8828 KB	Output is correct
59	Correct	1899 ms	8828 KB	Output is correct
60	Correct	1920 ms	8828 KB	Output is correct
61	Correct	1833 ms	8828 KB	Output is correct
62	Correct	1861 ms	8852 KB	Output is correct
63	Correct	1881 ms	8852 KB	Output is correct
64	Execution timed out	2052 ms	8852 KB	Time limit exceeded
65	Halted	0 ms	0 KB	-

답안 #48618

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