답안 #48642 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
48642	2018-05-17T14:49:43 Z	nobik	Boat (APIO16_boat)	C++14	58 / 100	2000 ms	8832 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*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	1700 ms	8312 KB	Output is correct
2	Correct	1803 ms	8372 KB	Output is correct
3	Correct	1770 ms	8508 KB	Output is correct
4	Correct	1729 ms	8532 KB	Output is correct
5	Correct	1769 ms	8552 KB	Output is correct
6	Correct	1796 ms	8720 KB	Output is correct
7	Correct	1794 ms	8720 KB	Output is correct
8	Correct	1808 ms	8720 KB	Output is correct
9	Correct	1817 ms	8720 KB	Output is correct
10	Correct	1768 ms	8720 KB	Output is correct
11	Correct	1787 ms	8720 KB	Output is correct
12	Correct	1800 ms	8720 KB	Output is correct
13	Correct	1755 ms	8720 KB	Output is correct
14	Correct	1797 ms	8720 KB	Output is correct
15	Correct	1826 ms	8720 KB	Output is correct
16	Correct	333 ms	8720 KB	Output is correct
17	Correct	339 ms	8720 KB	Output is correct
18	Correct	323 ms	8720 KB	Output is correct
19	Correct	339 ms	8720 KB	Output is correct
20	Correct	328 ms	8720 KB	Output is correct

Subtask #2
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1700 ms	8312 KB	Output is correct
2	Correct	1803 ms	8372 KB	Output is correct
3	Correct	1770 ms	8508 KB	Output is correct
4	Correct	1729 ms	8532 KB	Output is correct
5	Correct	1769 ms	8552 KB	Output is correct
6	Correct	1796 ms	8720 KB	Output is correct
7	Correct	1794 ms	8720 KB	Output is correct
8	Correct	1808 ms	8720 KB	Output is correct
9	Correct	1817 ms	8720 KB	Output is correct
10	Correct	1768 ms	8720 KB	Output is correct
11	Correct	1787 ms	8720 KB	Output is correct
12	Correct	1800 ms	8720 KB	Output is correct
13	Correct	1755 ms	8720 KB	Output is correct
14	Correct	1797 ms	8720 KB	Output is correct
15	Correct	1826 ms	8720 KB	Output is correct
16	Correct	333 ms	8720 KB	Output is correct
17	Correct	339 ms	8720 KB	Output is correct
18	Correct	323 ms	8720 KB	Output is correct
19	Correct	339 ms	8720 KB	Output is correct
20	Correct	328 ms	8720 KB	Output is correct
21	Correct	1803 ms	8736 KB	Output is correct
22	Correct	1816 ms	8736 KB	Output is correct
23	Correct	1759 ms	8736 KB	Output is correct
24	Correct	1744 ms	8736 KB	Output is correct
25	Correct	1742 ms	8736 KB	Output is correct
26	Correct	1852 ms	8736 KB	Output is correct
27	Correct	1865 ms	8736 KB	Output is correct
28	Correct	1828 ms	8736 KB	Output is correct
29	Correct	1810 ms	8736 KB	Output is correct
30	Correct	1794 ms	8736 KB	Output is correct
31	Correct	1735 ms	8736 KB	Output is correct
32	Correct	1740 ms	8736 KB	Output is correct
33	Correct	1845 ms	8736 KB	Output is correct
34	Correct	1751 ms	8736 KB	Output is correct
35	Correct	1792 ms	8832 KB	Output is correct
36	Correct	1750 ms	8832 KB	Output is correct
37	Correct	1753 ms	8832 KB	Output is correct
38	Correct	1764 ms	8832 KB	Output is correct

Subtask #3
27.0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Correct	23 ms	8832 KB	Output is correct
2	Correct	21 ms	8832 KB	Output is correct
3	Correct	22 ms	8832 KB	Output is correct
4	Correct	23 ms	8832 KB	Output is correct
5	Correct	30 ms	8832 KB	Output is correct
6	Correct	23 ms	8832 KB	Output is correct
7	Correct	23 ms	8832 KB	Output is correct
8	Correct	23 ms	8832 KB	Output is correct
9	Correct	26 ms	8832 KB	Output is correct
10	Correct	23 ms	8832 KB	Output is correct
11	Correct	22 ms	8832 KB	Output is correct
12	Correct	22 ms	8832 KB	Output is correct
13	Correct	22 ms	8832 KB	Output is correct
14	Correct	22 ms	8832 KB	Output is correct
15	Correct	22 ms	8832 KB	Output is correct
16	Correct	18 ms	8832 KB	Output is correct
17	Correct	15 ms	8832 KB	Output is correct
18	Correct	15 ms	8832 KB	Output is correct
19	Correct	16 ms	8832 KB	Output is correct
20	Correct	19 ms	8832 KB	Output is correct

Subtask #4
0 / 42.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1700 ms	8312 KB	Output is correct
2	Correct	1803 ms	8372 KB	Output is correct
3	Correct	1770 ms	8508 KB	Output is correct
4	Correct	1729 ms	8532 KB	Output is correct
5	Correct	1769 ms	8552 KB	Output is correct
6	Correct	1796 ms	8720 KB	Output is correct
7	Correct	1794 ms	8720 KB	Output is correct
8	Correct	1808 ms	8720 KB	Output is correct
9	Correct	1817 ms	8720 KB	Output is correct
10	Correct	1768 ms	8720 KB	Output is correct
11	Correct	1787 ms	8720 KB	Output is correct
12	Correct	1800 ms	8720 KB	Output is correct
13	Correct	1755 ms	8720 KB	Output is correct
14	Correct	1797 ms	8720 KB	Output is correct
15	Correct	1826 ms	8720 KB	Output is correct
16	Correct	333 ms	8720 KB	Output is correct
17	Correct	339 ms	8720 KB	Output is correct
18	Correct	323 ms	8720 KB	Output is correct
19	Correct	339 ms	8720 KB	Output is correct
20	Correct	328 ms	8720 KB	Output is correct
21	Correct	1803 ms	8736 KB	Output is correct
22	Correct	1816 ms	8736 KB	Output is correct
23	Correct	1759 ms	8736 KB	Output is correct
24	Correct	1744 ms	8736 KB	Output is correct
25	Correct	1742 ms	8736 KB	Output is correct
26	Correct	1852 ms	8736 KB	Output is correct
27	Correct	1865 ms	8736 KB	Output is correct
28	Correct	1828 ms	8736 KB	Output is correct
29	Correct	1810 ms	8736 KB	Output is correct
30	Correct	1794 ms	8736 KB	Output is correct
31	Correct	1735 ms	8736 KB	Output is correct
32	Correct	1740 ms	8736 KB	Output is correct
33	Correct	1845 ms	8736 KB	Output is correct
34	Correct	1751 ms	8736 KB	Output is correct
35	Correct	1792 ms	8832 KB	Output is correct
36	Correct	1750 ms	8832 KB	Output is correct
37	Correct	1753 ms	8832 KB	Output is correct
38	Correct	1764 ms	8832 KB	Output is correct
39	Correct	23 ms	8832 KB	Output is correct
40	Correct	21 ms	8832 KB	Output is correct
41	Correct	22 ms	8832 KB	Output is correct
42	Correct	23 ms	8832 KB	Output is correct
43	Correct	30 ms	8832 KB	Output is correct
44	Correct	23 ms	8832 KB	Output is correct
45	Correct	23 ms	8832 KB	Output is correct
46	Correct	23 ms	8832 KB	Output is correct
47	Correct	26 ms	8832 KB	Output is correct
48	Correct	23 ms	8832 KB	Output is correct
49	Correct	22 ms	8832 KB	Output is correct
50	Correct	22 ms	8832 KB	Output is correct
51	Correct	22 ms	8832 KB	Output is correct
52	Correct	22 ms	8832 KB	Output is correct
53	Correct	22 ms	8832 KB	Output is correct
54	Correct	18 ms	8832 KB	Output is correct
55	Correct	15 ms	8832 KB	Output is correct
56	Correct	15 ms	8832 KB	Output is correct
57	Correct	16 ms	8832 KB	Output is correct
58	Correct	19 ms	8832 KB	Output is correct
59	Correct	1876 ms	8832 KB	Output is correct
60	Correct	1877 ms	8832 KB	Output is correct
61	Correct	1832 ms	8832 KB	Output is correct
62	Correct	1891 ms	8832 KB	Output is correct
63	Correct	1852 ms	8832 KB	Output is correct
64	Execution timed out	2065 ms	8832 KB	Time limit exceeded
65	Halted	0 ms	0 KB	-

답안 #48642

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