답안 #51622 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
51622	2018-06-19T09:25:37 Z	tmwilliamlin168	Boat (APIO16_boat)	C++14	100 / 100	606 ms	9404 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);
	
//	cout << modI(2, M) << endl;
	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;//, cout << c[j][i-k] << " ";
				}
			}
//			cout << endl;
			dp[i][j]%=M;
//			cout << i << " " << j << " " << dp[i][j] << endl;
		}
	}
	cout << dp[n][pts.size()-1]-1;
}

Compilation message

boat.cpp: In function 'int main()':
boat.cpp:28:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=1; i<pts.size(); ++i) {
               ~^~~~~~~~~~~
boat.cpp:33:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<pts.size(); ++i)
               ~^~~~~~~~~~~
boat.cpp:37:17: 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	495 ms	8312 KB	Output is correct
2	Correct	494 ms	8312 KB	Output is correct
3	Correct	499 ms	8372 KB	Output is correct
4	Correct	514 ms	8372 KB	Output is correct
5	Correct	519 ms	8544 KB	Output is correct
6	Correct	255 ms	8544 KB	Output is correct
7	Correct	251 ms	8668 KB	Output is correct
8	Correct	259 ms	8668 KB	Output is correct
9	Correct	263 ms	8668 KB	Output is correct
10	Correct	252 ms	8780 KB	Output is correct
11	Correct	256 ms	8848 KB	Output is correct
12	Correct	263 ms	8848 KB	Output is correct
13	Correct	260 ms	8848 KB	Output is correct
14	Correct	269 ms	8880 KB	Output is correct
15	Correct	262 ms	8880 KB	Output is correct
16	Correct	94 ms	8880 KB	Output is correct
17	Correct	99 ms	8880 KB	Output is correct
18	Correct	100 ms	8880 KB	Output is correct
19	Correct	101 ms	8880 KB	Output is correct
20	Correct	98 ms	8880 KB	Output is correct

Subtask #2
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	495 ms	8312 KB	Output is correct
2	Correct	494 ms	8312 KB	Output is correct
3	Correct	499 ms	8372 KB	Output is correct
4	Correct	514 ms	8372 KB	Output is correct
5	Correct	519 ms	8544 KB	Output is correct
6	Correct	255 ms	8544 KB	Output is correct
7	Correct	251 ms	8668 KB	Output is correct
8	Correct	259 ms	8668 KB	Output is correct
9	Correct	263 ms	8668 KB	Output is correct
10	Correct	252 ms	8780 KB	Output is correct
11	Correct	256 ms	8848 KB	Output is correct
12	Correct	263 ms	8848 KB	Output is correct
13	Correct	260 ms	8848 KB	Output is correct
14	Correct	269 ms	8880 KB	Output is correct
15	Correct	262 ms	8880 KB	Output is correct
16	Correct	94 ms	8880 KB	Output is correct
17	Correct	99 ms	8880 KB	Output is correct
18	Correct	100 ms	8880 KB	Output is correct
19	Correct	101 ms	8880 KB	Output is correct
20	Correct	98 ms	8880 KB	Output is correct
21	Correct	391 ms	8880 KB	Output is correct
22	Correct	401 ms	8880 KB	Output is correct
23	Correct	450 ms	8880 KB	Output is correct
24	Correct	434 ms	8880 KB	Output is correct
25	Correct	401 ms	8880 KB	Output is correct
26	Correct	437 ms	8880 KB	Output is correct
27	Correct	447 ms	8880 KB	Output is correct
28	Correct	448 ms	8880 KB	Output is correct
29	Correct	384 ms	8880 KB	Output is correct
30	Correct	312 ms	9068 KB	Output is correct
31	Correct	249 ms	9068 KB	Output is correct
32	Correct	256 ms	9068 KB	Output is correct
33	Correct	253 ms	9080 KB	Output is correct
34	Correct	248 ms	9096 KB	Output is correct
35	Correct	514 ms	9168 KB	Output is correct
36	Correct	492 ms	9168 KB	Output is correct
37	Correct	488 ms	9168 KB	Output is correct
38	Correct	502 ms	9168 KB	Output is correct

Subtask #3
27.0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Correct	9 ms	9168 KB	Output is correct
2	Correct	9 ms	9168 KB	Output is correct
3	Correct	9 ms	9168 KB	Output is correct
4	Correct	9 ms	9168 KB	Output is correct
5	Correct	8 ms	9168 KB	Output is correct
6	Correct	9 ms	9168 KB	Output is correct
7	Correct	9 ms	9168 KB	Output is correct
8	Correct	9 ms	9168 KB	Output is correct
9	Correct	8 ms	9168 KB	Output is correct
10	Correct	9 ms	9168 KB	Output is correct
11	Correct	9 ms	9168 KB	Output is correct
12	Correct	8 ms	9168 KB	Output is correct
13	Correct	9 ms	9168 KB	Output is correct
14	Correct	8 ms	9168 KB	Output is correct
15	Correct	9 ms	9168 KB	Output is correct
16	Correct	7 ms	9168 KB	Output is correct
17	Correct	6 ms	9168 KB	Output is correct
18	Correct	7 ms	9168 KB	Output is correct
19	Correct	6 ms	9168 KB	Output is correct
20	Correct	6 ms	9168 KB	Output is correct

Subtask #4
42.0 / 42.0

#	결과	실행 시간	메모리	Grader output
1	Correct	495 ms	8312 KB	Output is correct
2	Correct	494 ms	8312 KB	Output is correct
3	Correct	499 ms	8372 KB	Output is correct
4	Correct	514 ms	8372 KB	Output is correct
5	Correct	519 ms	8544 KB	Output is correct
6	Correct	255 ms	8544 KB	Output is correct
7	Correct	251 ms	8668 KB	Output is correct
8	Correct	259 ms	8668 KB	Output is correct
9	Correct	263 ms	8668 KB	Output is correct
10	Correct	252 ms	8780 KB	Output is correct
11	Correct	256 ms	8848 KB	Output is correct
12	Correct	263 ms	8848 KB	Output is correct
13	Correct	260 ms	8848 KB	Output is correct
14	Correct	269 ms	8880 KB	Output is correct
15	Correct	262 ms	8880 KB	Output is correct
16	Correct	94 ms	8880 KB	Output is correct
17	Correct	99 ms	8880 KB	Output is correct
18	Correct	100 ms	8880 KB	Output is correct
19	Correct	101 ms	8880 KB	Output is correct
20	Correct	98 ms	8880 KB	Output is correct
21	Correct	391 ms	8880 KB	Output is correct
22	Correct	401 ms	8880 KB	Output is correct
23	Correct	450 ms	8880 KB	Output is correct
24	Correct	434 ms	8880 KB	Output is correct
25	Correct	401 ms	8880 KB	Output is correct
26	Correct	437 ms	8880 KB	Output is correct
27	Correct	447 ms	8880 KB	Output is correct
28	Correct	448 ms	8880 KB	Output is correct
29	Correct	384 ms	8880 KB	Output is correct
30	Correct	312 ms	9068 KB	Output is correct
31	Correct	249 ms	9068 KB	Output is correct
32	Correct	256 ms	9068 KB	Output is correct
33	Correct	253 ms	9080 KB	Output is correct
34	Correct	248 ms	9096 KB	Output is correct
35	Correct	514 ms	9168 KB	Output is correct
36	Correct	492 ms	9168 KB	Output is correct
37	Correct	488 ms	9168 KB	Output is correct
38	Correct	502 ms	9168 KB	Output is correct
39	Correct	9 ms	9168 KB	Output is correct
40	Correct	9 ms	9168 KB	Output is correct
41	Correct	9 ms	9168 KB	Output is correct
42	Correct	9 ms	9168 KB	Output is correct
43	Correct	8 ms	9168 KB	Output is correct
44	Correct	9 ms	9168 KB	Output is correct
45	Correct	9 ms	9168 KB	Output is correct
46	Correct	9 ms	9168 KB	Output is correct
47	Correct	8 ms	9168 KB	Output is correct
48	Correct	9 ms	9168 KB	Output is correct
49	Correct	9 ms	9168 KB	Output is correct
50	Correct	8 ms	9168 KB	Output is correct
51	Correct	9 ms	9168 KB	Output is correct
52	Correct	8 ms	9168 KB	Output is correct
53	Correct	9 ms	9168 KB	Output is correct
54	Correct	7 ms	9168 KB	Output is correct
55	Correct	6 ms	9168 KB	Output is correct
56	Correct	7 ms	9168 KB	Output is correct
57	Correct	6 ms	9168 KB	Output is correct
58	Correct	6 ms	9168 KB	Output is correct
59	Correct	481 ms	9168 KB	Output is correct
60	Correct	478 ms	9248 KB	Output is correct
61	Correct	455 ms	9288 KB	Output is correct
62	Correct	429 ms	9288 KB	Output is correct
63	Correct	426 ms	9288 KB	Output is correct
64	Correct	448 ms	9296 KB	Output is correct
65	Correct	440 ms	9296 KB	Output is correct
66	Correct	442 ms	9320 KB	Output is correct
67	Correct	424 ms	9320 KB	Output is correct
68	Correct	503 ms	9344 KB	Output is correct
69	Correct	558 ms	9344 KB	Output is correct
70	Correct	523 ms	9376 KB	Output is correct
71	Correct	460 ms	9376 KB	Output is correct
72	Correct	442 ms	9392 KB	Output is correct
73	Correct	606 ms	9404 KB	Output is correct
74	Correct	119 ms	9404 KB	Output is correct
75	Correct	131 ms	9404 KB	Output is correct
76	Correct	121 ms	9404 KB	Output is correct
77	Correct	116 ms	9404 KB	Output is correct
78	Correct	109 ms	9404 KB	Output is correct

답안 #51622

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