답안 #51625 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
51625	2018-06-19T09:29:39 Z	tmwilliamlin168	Boat (APIO16_boat)	C++14	100 / 100	702 ms	8700 KB

boat

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

#define ll long long

const int mxN=500, M=1e9+7;
int n, a[mxN], b[mxN];
ll dp[mxN+1][2*mxN], c[2*mxN][mxN+1], mi[mxN+1];
vector<int> pts;

inline ll modI(ll a, ll m) {
	return a<=1?a:(1-modI(m%a, a)*m)/a+m;
}

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	
	cin >> n;
	for(int i=0; i<n; ++i) {
		cin >> a[i] >> b[i], --a[i];
		pts.push_back(a[i]);
		pts.push_back(b[i]);
	}
	sort(pts.begin(), pts.end());
	pts.resize(unique(pts.begin(), pts.end())-pts.begin());
	for(int i=2; i<=n; ++i)
		mi[i]=modI(i, M);
	for(int i=1; i<pts.size(); ++i) {
		c[i][1]=pts[i]-pts[i-1];
		for(int j=2; j<=n; ++j)
			c[i][j]=c[i][j-1]*(pts[i]-pts[i-1]+j-1)%M*mi[j]%M;
	}
	for(int i=0; i<pts.size(); ++i)
		dp[0][i]=1;
	for(int i=1; i<=n; ++i) {
		dp[i][0]=1;
		for(int j=1; j<pts.size(); ++j) {
			dp[i][j]=dp[i][j-1];
			for(int k=i, n2=0; k; --k) {
				if(pts[j]>a[k-1]&&pts[j]<=b[k-1]) {
					++n2;
					dp[i][j]+=dp[k-1][j-1]*c[j][n2]%M;
				}
			}
			dp[i][j]%=M;
		}
	}
	cout << dp[n][pts.size()-1]-1;
}

Compilation message

boat.cpp: In function 'int main()':
boat.cpp:29:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=1; i<pts.size(); ++i) {
               ~^~~~~~~~~~~
boat.cpp:34:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<pts.size(); ++i)
               ~^~~~~~~~~~~
boat.cpp:38:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j=1; j<pts.size(); ++j) {
                ~^~~~~~~~~~~

Subtask #1
9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	455 ms	8184 KB	Output is correct
2	Correct	462 ms	8292 KB	Output is correct
3	Correct	470 ms	8352 KB	Output is correct
4	Correct	465 ms	8396 KB	Output is correct
5	Correct	478 ms	8396 KB	Output is correct
6	Correct	195 ms	8396 KB	Output is correct
7	Correct	171 ms	8444 KB	Output is correct
8	Correct	175 ms	8444 KB	Output is correct
9	Correct	177 ms	8444 KB	Output is correct
10	Correct	166 ms	8444 KB	Output is correct
11	Correct	186 ms	8452 KB	Output is correct
12	Correct	204 ms	8452 KB	Output is correct
13	Correct	185 ms	8452 KB	Output is correct
14	Correct	157 ms	8452 KB	Output is correct
15	Correct	171 ms	8452 KB	Output is correct
16	Correct	83 ms	8452 KB	Output is correct
17	Correct	88 ms	8452 KB	Output is correct
18	Correct	88 ms	8452 KB	Output is correct
19	Correct	88 ms	8452 KB	Output is correct
20	Correct	96 ms	8452 KB	Output is correct

Subtask #2
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	455 ms	8184 KB	Output is correct
2	Correct	462 ms	8292 KB	Output is correct
3	Correct	470 ms	8352 KB	Output is correct
4	Correct	465 ms	8396 KB	Output is correct
5	Correct	478 ms	8396 KB	Output is correct
6	Correct	195 ms	8396 KB	Output is correct
7	Correct	171 ms	8444 KB	Output is correct
8	Correct	175 ms	8444 KB	Output is correct
9	Correct	177 ms	8444 KB	Output is correct
10	Correct	166 ms	8444 KB	Output is correct
11	Correct	186 ms	8452 KB	Output is correct
12	Correct	204 ms	8452 KB	Output is correct
13	Correct	185 ms	8452 KB	Output is correct
14	Correct	157 ms	8452 KB	Output is correct
15	Correct	171 ms	8452 KB	Output is correct
16	Correct	83 ms	8452 KB	Output is correct
17	Correct	88 ms	8452 KB	Output is correct
18	Correct	88 ms	8452 KB	Output is correct
19	Correct	88 ms	8452 KB	Output is correct
20	Correct	96 ms	8452 KB	Output is correct
21	Correct	318 ms	8452 KB	Output is correct
22	Correct	317 ms	8452 KB	Output is correct
23	Correct	304 ms	8452 KB	Output is correct
24	Correct	405 ms	8452 KB	Output is correct
25	Correct	314 ms	8452 KB	Output is correct
26	Correct	314 ms	8452 KB	Output is correct
27	Correct	346 ms	8452 KB	Output is correct
28	Correct	311 ms	8452 KB	Output is correct
29	Correct	310 ms	8452 KB	Output is correct
30	Correct	184 ms	8552 KB	Output is correct
31	Correct	188 ms	8552 KB	Output is correct
32	Correct	176 ms	8552 KB	Output is correct
33	Correct	180 ms	8552 KB	Output is correct
34	Correct	171 ms	8624 KB	Output is correct
35	Correct	506 ms	8624 KB	Output is correct
36	Correct	485 ms	8624 KB	Output is correct
37	Correct	471 ms	8624 KB	Output is correct
38	Correct	482 ms	8624 KB	Output is correct

Subtask #3
27.0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Correct	7 ms	8624 KB	Output is correct
2	Correct	7 ms	8624 KB	Output is correct
3	Correct	6 ms	8624 KB	Output is correct
4	Correct	9 ms	8624 KB	Output is correct
5	Correct	8 ms	8624 KB	Output is correct
6	Correct	10 ms	8624 KB	Output is correct
7	Correct	8 ms	8624 KB	Output is correct
8	Correct	6 ms	8624 KB	Output is correct
9	Correct	7 ms	8624 KB	Output is correct
10	Correct	7 ms	8624 KB	Output is correct
11	Correct	6 ms	8624 KB	Output is correct
12	Correct	6 ms	8624 KB	Output is correct
13	Correct	7 ms	8624 KB	Output is correct
14	Correct	8 ms	8624 KB	Output is correct
15	Correct	6 ms	8624 KB	Output is correct
16	Correct	6 ms	8624 KB	Output is correct
17	Correct	5 ms	8624 KB	Output is correct
18	Correct	5 ms	8624 KB	Output is correct
19	Correct	4 ms	8624 KB	Output is correct
20	Correct	5 ms	8624 KB	Output is correct

Subtask #4
42.0 / 42.0

#	결과	실행 시간	메모리	Grader output
1	Correct	455 ms	8184 KB	Output is correct
2	Correct	462 ms	8292 KB	Output is correct
3	Correct	470 ms	8352 KB	Output is correct
4	Correct	465 ms	8396 KB	Output is correct
5	Correct	478 ms	8396 KB	Output is correct
6	Correct	195 ms	8396 KB	Output is correct
7	Correct	171 ms	8444 KB	Output is correct
8	Correct	175 ms	8444 KB	Output is correct
9	Correct	177 ms	8444 KB	Output is correct
10	Correct	166 ms	8444 KB	Output is correct
11	Correct	186 ms	8452 KB	Output is correct
12	Correct	204 ms	8452 KB	Output is correct
13	Correct	185 ms	8452 KB	Output is correct
14	Correct	157 ms	8452 KB	Output is correct
15	Correct	171 ms	8452 KB	Output is correct
16	Correct	83 ms	8452 KB	Output is correct
17	Correct	88 ms	8452 KB	Output is correct
18	Correct	88 ms	8452 KB	Output is correct
19	Correct	88 ms	8452 KB	Output is correct
20	Correct	96 ms	8452 KB	Output is correct
21	Correct	318 ms	8452 KB	Output is correct
22	Correct	317 ms	8452 KB	Output is correct
23	Correct	304 ms	8452 KB	Output is correct
24	Correct	405 ms	8452 KB	Output is correct
25	Correct	314 ms	8452 KB	Output is correct
26	Correct	314 ms	8452 KB	Output is correct
27	Correct	346 ms	8452 KB	Output is correct
28	Correct	311 ms	8452 KB	Output is correct
29	Correct	310 ms	8452 KB	Output is correct
30	Correct	184 ms	8552 KB	Output is correct
31	Correct	188 ms	8552 KB	Output is correct
32	Correct	176 ms	8552 KB	Output is correct
33	Correct	180 ms	8552 KB	Output is correct
34	Correct	171 ms	8624 KB	Output is correct
35	Correct	506 ms	8624 KB	Output is correct
36	Correct	485 ms	8624 KB	Output is correct
37	Correct	471 ms	8624 KB	Output is correct
38	Correct	482 ms	8624 KB	Output is correct
39	Correct	7 ms	8624 KB	Output is correct
40	Correct	7 ms	8624 KB	Output is correct
41	Correct	6 ms	8624 KB	Output is correct
42	Correct	9 ms	8624 KB	Output is correct
43	Correct	8 ms	8624 KB	Output is correct
44	Correct	10 ms	8624 KB	Output is correct
45	Correct	8 ms	8624 KB	Output is correct
46	Correct	6 ms	8624 KB	Output is correct
47	Correct	7 ms	8624 KB	Output is correct
48	Correct	7 ms	8624 KB	Output is correct
49	Correct	6 ms	8624 KB	Output is correct
50	Correct	6 ms	8624 KB	Output is correct
51	Correct	7 ms	8624 KB	Output is correct
52	Correct	8 ms	8624 KB	Output is correct
53	Correct	6 ms	8624 KB	Output is correct
54	Correct	6 ms	8624 KB	Output is correct
55	Correct	5 ms	8624 KB	Output is correct
56	Correct	5 ms	8624 KB	Output is correct
57	Correct	4 ms	8624 KB	Output is correct
58	Correct	5 ms	8624 KB	Output is correct
59	Correct	346 ms	8624 KB	Output is correct
60	Correct	348 ms	8624 KB	Output is correct
61	Correct	369 ms	8700 KB	Output is correct
62	Correct	341 ms	8700 KB	Output is correct
63	Correct	337 ms	8700 KB	Output is correct
64	Correct	504 ms	8700 KB	Output is correct
65	Correct	400 ms	8700 KB	Output is correct
66	Correct	507 ms	8700 KB	Output is correct
67	Correct	362 ms	8700 KB	Output is correct
68	Correct	702 ms	8700 KB	Output is correct
69	Correct	369 ms	8700 KB	Output is correct
70	Correct	425 ms	8700 KB	Output is correct
71	Correct	384 ms	8700 KB	Output is correct
72	Correct	478 ms	8700 KB	Output is correct
73	Correct	362 ms	8700 KB	Output is correct
74	Correct	98 ms	8700 KB	Output is correct
75	Correct	98 ms	8700 KB	Output is correct
76	Correct	106 ms	8700 KB	Output is correct
77	Correct	115 ms	8700 KB	Output is correct
78	Correct	125 ms	8700 KB	Output is correct

답안 #51625

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