답안 #51624 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
51624	2018-06-19T09:27:22 Z	tmwilliamlin168	Boat (APIO16_boat)	C++14	100 / 100	557 ms	8656 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];
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=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*modI(j, M)%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:27:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=1; i<pts.size(); ++i) {
               ~^~~~~~~~~~~
boat.cpp:32:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<pts.size(); ++i)
               ~^~~~~~~~~~~
boat.cpp:36:17: 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	496 ms	8184 KB	Output is correct
2	Correct	515 ms	8424 KB	Output is correct
3	Correct	520 ms	8424 KB	Output is correct
4	Correct	525 ms	8424 KB	Output is correct
5	Correct	506 ms	8544 KB	Output is correct
6	Correct	261 ms	8544 KB	Output is correct
7	Correct	252 ms	8544 KB	Output is correct
8	Correct	262 ms	8544 KB	Output is correct
9	Correct	268 ms	8560 KB	Output is correct
10	Correct	254 ms	8560 KB	Output is correct
11	Correct	260 ms	8560 KB	Output is correct
12	Correct	266 ms	8560 KB	Output is correct
13	Correct	252 ms	8560 KB	Output is correct
14	Correct	241 ms	8560 KB	Output is correct
15	Correct	261 ms	8560 KB	Output is correct
16	Correct	98 ms	8560 KB	Output is correct
17	Correct	98 ms	8560 KB	Output is correct
18	Correct	99 ms	8560 KB	Output is correct
19	Correct	100 ms	8560 KB	Output is correct
20	Correct	96 ms	8560 KB	Output is correct

Subtask #2
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	496 ms	8184 KB	Output is correct
2	Correct	515 ms	8424 KB	Output is correct
3	Correct	520 ms	8424 KB	Output is correct
4	Correct	525 ms	8424 KB	Output is correct
5	Correct	506 ms	8544 KB	Output is correct
6	Correct	261 ms	8544 KB	Output is correct
7	Correct	252 ms	8544 KB	Output is correct
8	Correct	262 ms	8544 KB	Output is correct
9	Correct	268 ms	8560 KB	Output is correct
10	Correct	254 ms	8560 KB	Output is correct
11	Correct	260 ms	8560 KB	Output is correct
12	Correct	266 ms	8560 KB	Output is correct
13	Correct	252 ms	8560 KB	Output is correct
14	Correct	241 ms	8560 KB	Output is correct
15	Correct	261 ms	8560 KB	Output is correct
16	Correct	98 ms	8560 KB	Output is correct
17	Correct	98 ms	8560 KB	Output is correct
18	Correct	99 ms	8560 KB	Output is correct
19	Correct	100 ms	8560 KB	Output is correct
20	Correct	96 ms	8560 KB	Output is correct
21	Correct	407 ms	8560 KB	Output is correct
22	Correct	414 ms	8560 KB	Output is correct
23	Correct	383 ms	8560 KB	Output is correct
24	Correct	388 ms	8560 KB	Output is correct
25	Correct	396 ms	8560 KB	Output is correct
26	Correct	393 ms	8560 KB	Output is correct
27	Correct	420 ms	8560 KB	Output is correct
28	Correct	398 ms	8560 KB	Output is correct
29	Correct	388 ms	8560 KB	Output is correct
30	Correct	272 ms	8560 KB	Output is correct
31	Correct	248 ms	8560 KB	Output is correct
32	Correct	284 ms	8576 KB	Output is correct
33	Correct	254 ms	8576 KB	Output is correct
34	Correct	248 ms	8576 KB	Output is correct
35	Correct	500 ms	8648 KB	Output is correct
36	Correct	497 ms	8648 KB	Output is correct
37	Correct	538 ms	8648 KB	Output is correct
38	Correct	517 ms	8648 KB	Output is correct

Subtask #3
27.0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Correct	10 ms	8648 KB	Output is correct
2	Correct	10 ms	8648 KB	Output is correct
3	Correct	8 ms	8648 KB	Output is correct
4	Correct	9 ms	8648 KB	Output is correct
5	Correct	9 ms	8648 KB	Output is correct
6	Correct	10 ms	8648 KB	Output is correct
7	Correct	9 ms	8648 KB	Output is correct
8	Correct	9 ms	8648 KB	Output is correct
9	Correct	9 ms	8648 KB	Output is correct
10	Correct	9 ms	8648 KB	Output is correct
11	Correct	8 ms	8648 KB	Output is correct
12	Correct	8 ms	8648 KB	Output is correct
13	Correct	9 ms	8648 KB	Output is correct
14	Correct	9 ms	8648 KB	Output is correct
15	Correct	8 ms	8648 KB	Output is correct
16	Correct	6 ms	8648 KB	Output is correct
17	Correct	6 ms	8648 KB	Output is correct
18	Correct	6 ms	8648 KB	Output is correct
19	Correct	6 ms	8648 KB	Output is correct
20	Correct	6 ms	8648 KB	Output is correct

Subtask #4
42.0 / 42.0

#	결과	실행 시간	메모리	Grader output
1	Correct	496 ms	8184 KB	Output is correct
2	Correct	515 ms	8424 KB	Output is correct
3	Correct	520 ms	8424 KB	Output is correct
4	Correct	525 ms	8424 KB	Output is correct
5	Correct	506 ms	8544 KB	Output is correct
6	Correct	261 ms	8544 KB	Output is correct
7	Correct	252 ms	8544 KB	Output is correct
8	Correct	262 ms	8544 KB	Output is correct
9	Correct	268 ms	8560 KB	Output is correct
10	Correct	254 ms	8560 KB	Output is correct
11	Correct	260 ms	8560 KB	Output is correct
12	Correct	266 ms	8560 KB	Output is correct
13	Correct	252 ms	8560 KB	Output is correct
14	Correct	241 ms	8560 KB	Output is correct
15	Correct	261 ms	8560 KB	Output is correct
16	Correct	98 ms	8560 KB	Output is correct
17	Correct	98 ms	8560 KB	Output is correct
18	Correct	99 ms	8560 KB	Output is correct
19	Correct	100 ms	8560 KB	Output is correct
20	Correct	96 ms	8560 KB	Output is correct
21	Correct	407 ms	8560 KB	Output is correct
22	Correct	414 ms	8560 KB	Output is correct
23	Correct	383 ms	8560 KB	Output is correct
24	Correct	388 ms	8560 KB	Output is correct
25	Correct	396 ms	8560 KB	Output is correct
26	Correct	393 ms	8560 KB	Output is correct
27	Correct	420 ms	8560 KB	Output is correct
28	Correct	398 ms	8560 KB	Output is correct
29	Correct	388 ms	8560 KB	Output is correct
30	Correct	272 ms	8560 KB	Output is correct
31	Correct	248 ms	8560 KB	Output is correct
32	Correct	284 ms	8576 KB	Output is correct
33	Correct	254 ms	8576 KB	Output is correct
34	Correct	248 ms	8576 KB	Output is correct
35	Correct	500 ms	8648 KB	Output is correct
36	Correct	497 ms	8648 KB	Output is correct
37	Correct	538 ms	8648 KB	Output is correct
38	Correct	517 ms	8648 KB	Output is correct
39	Correct	10 ms	8648 KB	Output is correct
40	Correct	10 ms	8648 KB	Output is correct
41	Correct	8 ms	8648 KB	Output is correct
42	Correct	9 ms	8648 KB	Output is correct
43	Correct	9 ms	8648 KB	Output is correct
44	Correct	10 ms	8648 KB	Output is correct
45	Correct	9 ms	8648 KB	Output is correct
46	Correct	9 ms	8648 KB	Output is correct
47	Correct	9 ms	8648 KB	Output is correct
48	Correct	9 ms	8648 KB	Output is correct
49	Correct	8 ms	8648 KB	Output is correct
50	Correct	8 ms	8648 KB	Output is correct
51	Correct	9 ms	8648 KB	Output is correct
52	Correct	9 ms	8648 KB	Output is correct
53	Correct	8 ms	8648 KB	Output is correct
54	Correct	6 ms	8648 KB	Output is correct
55	Correct	6 ms	8648 KB	Output is correct
56	Correct	6 ms	8648 KB	Output is correct
57	Correct	6 ms	8648 KB	Output is correct
58	Correct	6 ms	8648 KB	Output is correct
59	Correct	439 ms	8656 KB	Output is correct
60	Correct	505 ms	8656 KB	Output is correct
61	Correct	411 ms	8656 KB	Output is correct
62	Correct	456 ms	8656 KB	Output is correct
63	Correct	418 ms	8656 KB	Output is correct
64	Correct	444 ms	8656 KB	Output is correct
65	Correct	557 ms	8656 KB	Output is correct
66	Correct	458 ms	8656 KB	Output is correct
67	Correct	477 ms	8656 KB	Output is correct
68	Correct	448 ms	8656 KB	Output is correct
69	Correct	531 ms	8656 KB	Output is correct
70	Correct	437 ms	8656 KB	Output is correct
71	Correct	452 ms	8656 KB	Output is correct
72	Correct	429 ms	8656 KB	Output is correct
73	Correct	484 ms	8656 KB	Output is correct
74	Correct	102 ms	8656 KB	Output is correct
75	Correct	115 ms	8656 KB	Output is correct
76	Correct	157 ms	8656 KB	Output is correct
77	Correct	115 ms	8656 KB	Output is correct
78	Correct	119 ms	8656 KB	Output is correct

답안 #51624

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