답안 #51626 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
51626	2018-06-19T09:46:39 Z	tmwilliamlin168	Boat (APIO16_boat)	C++14	100 / 100	597 ms	8628 KB

boat

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

#define getchar_unlocked getchar
#define putchar_unlocked putchar
#define ll long long

inline int in() {
	int result = 0;
	char ch = getchar_unlocked();
	while (true) {
		if(ch >= '0' && ch <= '9')
			break;
		ch = getchar_unlocked();
	}
	result = ch-'0';
	while(true) {
		ch = getchar_unlocked();
		if (ch < '0' || ch > '9')
			break;
		result = result*10 + (ch - '0');
	}
	return result;
}
inline void out(int x) {
	int rev=x, c=0;
	if(!x) {
		putchar_unlocked('0');
		return;
	}
	while(!(rev%10)) {
		++c;
		rev/=10;
	}
	rev=0;
	while(x) {
		rev=rev*10+x%10;
		x/=10;
	}
	while(rev) {
		putchar_unlocked(rev%10+'0');
		rev/=10;
	}
	while(c--)
		putchar_unlocked('0');
}

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() {
	n=in();
	for(int i=0; i<n; ++i) {
		a[i]=in()-1;
		b[i]=in();
		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;
		}
	}
	out(dp[n][pts.size()-1]-1);
}

Compilation message

boat.cpp: In function 'int main()':
boat.cpp:67:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=1; i<pts.size(); ++i) {
               ~^~~~~~~~~~~
boat.cpp:72:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<pts.size(); ++i)
               ~^~~~~~~~~~~
boat.cpp:76:17: 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	597 ms	8224 KB	Output is correct
2	Correct	551 ms	8300 KB	Output is correct
3	Correct	551 ms	8440 KB	Output is correct
4	Correct	546 ms	8440 KB	Output is correct
5	Correct	541 ms	8440 KB	Output is correct
6	Correct	282 ms	8460 KB	Output is correct
7	Correct	275 ms	8464 KB	Output is correct
8	Correct	257 ms	8464 KB	Output is correct
9	Correct	269 ms	8464 KB	Output is correct
10	Correct	259 ms	8464 KB	Output is correct
11	Correct	250 ms	8464 KB	Output is correct
12	Correct	267 ms	8464 KB	Output is correct
13	Correct	250 ms	8464 KB	Output is correct
14	Correct	241 ms	8464 KB	Output is correct
15	Correct	275 ms	8464 KB	Output is correct
16	Correct	99 ms	8464 KB	Output is correct
17	Correct	105 ms	8464 KB	Output is correct
18	Correct	115 ms	8464 KB	Output is correct
19	Correct	132 ms	8464 KB	Output is correct
20	Correct	112 ms	8464 KB	Output is correct

Subtask #2
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	597 ms	8224 KB	Output is correct
2	Correct	551 ms	8300 KB	Output is correct
3	Correct	551 ms	8440 KB	Output is correct
4	Correct	546 ms	8440 KB	Output is correct
5	Correct	541 ms	8440 KB	Output is correct
6	Correct	282 ms	8460 KB	Output is correct
7	Correct	275 ms	8464 KB	Output is correct
8	Correct	257 ms	8464 KB	Output is correct
9	Correct	269 ms	8464 KB	Output is correct
10	Correct	259 ms	8464 KB	Output is correct
11	Correct	250 ms	8464 KB	Output is correct
12	Correct	267 ms	8464 KB	Output is correct
13	Correct	250 ms	8464 KB	Output is correct
14	Correct	241 ms	8464 KB	Output is correct
15	Correct	275 ms	8464 KB	Output is correct
16	Correct	99 ms	8464 KB	Output is correct
17	Correct	105 ms	8464 KB	Output is correct
18	Correct	115 ms	8464 KB	Output is correct
19	Correct	132 ms	8464 KB	Output is correct
20	Correct	112 ms	8464 KB	Output is correct
21	Correct	504 ms	8464 KB	Output is correct
22	Correct	438 ms	8464 KB	Output is correct
23	Correct	463 ms	8464 KB	Output is correct
24	Correct	388 ms	8464 KB	Output is correct
25	Correct	396 ms	8464 KB	Output is correct
26	Correct	375 ms	8464 KB	Output is correct
27	Correct	464 ms	8464 KB	Output is correct
28	Correct	405 ms	8464 KB	Output is correct
29	Correct	411 ms	8464 KB	Output is correct
30	Correct	313 ms	8492 KB	Output is correct
31	Correct	262 ms	8492 KB	Output is correct
32	Correct	277 ms	8492 KB	Output is correct
33	Correct	264 ms	8492 KB	Output is correct
34	Correct	294 ms	8492 KB	Output is correct
35	Correct	593 ms	8492 KB	Output is correct
36	Correct	573 ms	8492 KB	Output is correct
37	Correct	561 ms	8600 KB	Output is correct
38	Correct	577 ms	8600 KB	Output is correct

Subtask #3
27.0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Correct	10 ms	8600 KB	Output is correct
2	Correct	8 ms	8600 KB	Output is correct
3	Correct	10 ms	8600 KB	Output is correct
4	Correct	9 ms	8600 KB	Output is correct
5	Correct	9 ms	8600 KB	Output is correct
6	Correct	9 ms	8600 KB	Output is correct
7	Correct	10 ms	8600 KB	Output is correct
8	Correct	9 ms	8600 KB	Output is correct
9	Correct	10 ms	8600 KB	Output is correct
10	Correct	8 ms	8600 KB	Output is correct
11	Correct	9 ms	8600 KB	Output is correct
12	Correct	10 ms	8600 KB	Output is correct
13	Correct	8 ms	8600 KB	Output is correct
14	Correct	8 ms	8600 KB	Output is correct
15	Correct	9 ms	8600 KB	Output is correct
16	Correct	6 ms	8600 KB	Output is correct
17	Correct	6 ms	8600 KB	Output is correct
18	Correct	7 ms	8600 KB	Output is correct
19	Correct	6 ms	8600 KB	Output is correct
20	Correct	6 ms	8600 KB	Output is correct

Subtask #4
42.0 / 42.0

#	결과	실행 시간	메모리	Grader output
1	Correct	597 ms	8224 KB	Output is correct
2	Correct	551 ms	8300 KB	Output is correct
3	Correct	551 ms	8440 KB	Output is correct
4	Correct	546 ms	8440 KB	Output is correct
5	Correct	541 ms	8440 KB	Output is correct
6	Correct	282 ms	8460 KB	Output is correct
7	Correct	275 ms	8464 KB	Output is correct
8	Correct	257 ms	8464 KB	Output is correct
9	Correct	269 ms	8464 KB	Output is correct
10	Correct	259 ms	8464 KB	Output is correct
11	Correct	250 ms	8464 KB	Output is correct
12	Correct	267 ms	8464 KB	Output is correct
13	Correct	250 ms	8464 KB	Output is correct
14	Correct	241 ms	8464 KB	Output is correct
15	Correct	275 ms	8464 KB	Output is correct
16	Correct	99 ms	8464 KB	Output is correct
17	Correct	105 ms	8464 KB	Output is correct
18	Correct	115 ms	8464 KB	Output is correct
19	Correct	132 ms	8464 KB	Output is correct
20	Correct	112 ms	8464 KB	Output is correct
21	Correct	504 ms	8464 KB	Output is correct
22	Correct	438 ms	8464 KB	Output is correct
23	Correct	463 ms	8464 KB	Output is correct
24	Correct	388 ms	8464 KB	Output is correct
25	Correct	396 ms	8464 KB	Output is correct
26	Correct	375 ms	8464 KB	Output is correct
27	Correct	464 ms	8464 KB	Output is correct
28	Correct	405 ms	8464 KB	Output is correct
29	Correct	411 ms	8464 KB	Output is correct
30	Correct	313 ms	8492 KB	Output is correct
31	Correct	262 ms	8492 KB	Output is correct
32	Correct	277 ms	8492 KB	Output is correct
33	Correct	264 ms	8492 KB	Output is correct
34	Correct	294 ms	8492 KB	Output is correct
35	Correct	593 ms	8492 KB	Output is correct
36	Correct	573 ms	8492 KB	Output is correct
37	Correct	561 ms	8600 KB	Output is correct
38	Correct	577 ms	8600 KB	Output is correct
39	Correct	10 ms	8600 KB	Output is correct
40	Correct	8 ms	8600 KB	Output is correct
41	Correct	10 ms	8600 KB	Output is correct
42	Correct	9 ms	8600 KB	Output is correct
43	Correct	9 ms	8600 KB	Output is correct
44	Correct	9 ms	8600 KB	Output is correct
45	Correct	10 ms	8600 KB	Output is correct
46	Correct	9 ms	8600 KB	Output is correct
47	Correct	10 ms	8600 KB	Output is correct
48	Correct	8 ms	8600 KB	Output is correct
49	Correct	9 ms	8600 KB	Output is correct
50	Correct	10 ms	8600 KB	Output is correct
51	Correct	8 ms	8600 KB	Output is correct
52	Correct	8 ms	8600 KB	Output is correct
53	Correct	9 ms	8600 KB	Output is correct
54	Correct	6 ms	8600 KB	Output is correct
55	Correct	6 ms	8600 KB	Output is correct
56	Correct	7 ms	8600 KB	Output is correct
57	Correct	6 ms	8600 KB	Output is correct
58	Correct	6 ms	8600 KB	Output is correct
59	Correct	441 ms	8600 KB	Output is correct
60	Correct	482 ms	8600 KB	Output is correct
61	Correct	521 ms	8600 KB	Output is correct
62	Correct	470 ms	8600 KB	Output is correct
63	Correct	498 ms	8600 KB	Output is correct
64	Correct	474 ms	8600 KB	Output is correct
65	Correct	448 ms	8600 KB	Output is correct
66	Correct	491 ms	8600 KB	Output is correct
67	Correct	563 ms	8600 KB	Output is correct
68	Correct	493 ms	8600 KB	Output is correct
69	Correct	450 ms	8600 KB	Output is correct
70	Correct	426 ms	8600 KB	Output is correct
71	Correct	431 ms	8600 KB	Output is correct
72	Correct	574 ms	8628 KB	Output is correct
73	Correct	436 ms	8628 KB	Output is correct
74	Correct	103 ms	8628 KB	Output is correct
75	Correct	111 ms	8628 KB	Output is correct
76	Correct	103 ms	8628 KB	Output is correct
77	Correct	114 ms	8628 KB	Output is correct
78	Correct	103 ms	8628 KB	Output is correct

답안 #51626

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