Submission #51627

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
51627	2018-06-19T09:47:25 Z	tmwilliamlin168	Boat (APIO16_boat)	C++14	100 / 100	623 ms	8676 KB

boat

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

#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:65:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=1; i<pts.size(); ++i) {
               ~^~~~~~~~~~~
boat.cpp:70:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<pts.size(); ++i)
               ~^~~~~~~~~~~
boat.cpp:74:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int j=1; j<pts.size(); ++j) {
                ~^~~~~~~~~~~

Subtask #1
9.0 / 9.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	547 ms	8188 KB	Output is correct
2	Correct	592 ms	8292 KB	Output is correct
3	Correct	559 ms	8488 KB	Output is correct
4	Correct	555 ms	8488 KB	Output is correct
5	Correct	550 ms	8488 KB	Output is correct
6	Correct	253 ms	8488 KB	Output is correct
7	Correct	247 ms	8488 KB	Output is correct
8	Correct	255 ms	8488 KB	Output is correct
9	Correct	263 ms	8488 KB	Output is correct
10	Correct	252 ms	8488 KB	Output is correct
11	Correct	254 ms	8528 KB	Output is correct
12	Correct	263 ms	8544 KB	Output is correct
13	Correct	268 ms	8544 KB	Output is correct
14	Correct	252 ms	8544 KB	Output is correct
15	Correct	264 ms	8544 KB	Output is correct
16	Correct	98 ms	8544 KB	Output is correct
17	Correct	106 ms	8544 KB	Output is correct
18	Correct	103 ms	8544 KB	Output is correct
19	Correct	113 ms	8544 KB	Output is correct
20	Correct	102 ms	8544 KB	Output is correct

Subtask #2
22.0 / 22.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	547 ms	8188 KB	Output is correct
2	Correct	592 ms	8292 KB	Output is correct
3	Correct	559 ms	8488 KB	Output is correct
4	Correct	555 ms	8488 KB	Output is correct
5	Correct	550 ms	8488 KB	Output is correct
6	Correct	253 ms	8488 KB	Output is correct
7	Correct	247 ms	8488 KB	Output is correct
8	Correct	255 ms	8488 KB	Output is correct
9	Correct	263 ms	8488 KB	Output is correct
10	Correct	252 ms	8488 KB	Output is correct
11	Correct	254 ms	8528 KB	Output is correct
12	Correct	263 ms	8544 KB	Output is correct
13	Correct	268 ms	8544 KB	Output is correct
14	Correct	252 ms	8544 KB	Output is correct
15	Correct	264 ms	8544 KB	Output is correct
16	Correct	98 ms	8544 KB	Output is correct
17	Correct	106 ms	8544 KB	Output is correct
18	Correct	103 ms	8544 KB	Output is correct
19	Correct	113 ms	8544 KB	Output is correct
20	Correct	102 ms	8544 KB	Output is correct
21	Correct	414 ms	8544 KB	Output is correct
22	Correct	393 ms	8544 KB	Output is correct
23	Correct	446 ms	8544 KB	Output is correct
24	Correct	416 ms	8544 KB	Output is correct
25	Correct	483 ms	8544 KB	Output is correct
26	Correct	545 ms	8544 KB	Output is correct
27	Correct	556 ms	8544 KB	Output is correct
28	Correct	456 ms	8544 KB	Output is correct
29	Correct	522 ms	8544 KB	Output is correct
30	Correct	275 ms	8544 KB	Output is correct
31	Correct	292 ms	8544 KB	Output is correct
32	Correct	287 ms	8544 KB	Output is correct
33	Correct	285 ms	8544 KB	Output is correct
34	Correct	266 ms	8552 KB	Output is correct
35	Correct	578 ms	8552 KB	Output is correct
36	Correct	576 ms	8552 KB	Output is correct
37	Correct	597 ms	8552 KB	Output is correct
38	Correct	575 ms	8552 KB	Output is correct

Subtask #3
27.0 / 27.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	8 ms	8552 KB	Output is correct
2	Correct	8 ms	8552 KB	Output is correct
3	Correct	9 ms	8552 KB	Output is correct
4	Correct	11 ms	8552 KB	Output is correct
5	Correct	9 ms	8552 KB	Output is correct
6	Correct	11 ms	8552 KB	Output is correct
7	Correct	9 ms	8552 KB	Output is correct
8	Correct	12 ms	8552 KB	Output is correct
9	Correct	9 ms	8552 KB	Output is correct
10	Correct	9 ms	8552 KB	Output is correct
11	Correct	9 ms	8552 KB	Output is correct
12	Correct	9 ms	8552 KB	Output is correct
13	Correct	9 ms	8552 KB	Output is correct
14	Correct	8 ms	8552 KB	Output is correct
15	Correct	9 ms	8552 KB	Output is correct
16	Correct	7 ms	8552 KB	Output is correct
17	Correct	6 ms	8552 KB	Output is correct
18	Correct	6 ms	8552 KB	Output is correct
19	Correct	6 ms	8552 KB	Output is correct
20	Correct	6 ms	8552 KB	Output is correct

Subtask #4
42.0 / 42.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	547 ms	8188 KB	Output is correct
2	Correct	592 ms	8292 KB	Output is correct
3	Correct	559 ms	8488 KB	Output is correct
4	Correct	555 ms	8488 KB	Output is correct
5	Correct	550 ms	8488 KB	Output is correct
6	Correct	253 ms	8488 KB	Output is correct
7	Correct	247 ms	8488 KB	Output is correct
8	Correct	255 ms	8488 KB	Output is correct
9	Correct	263 ms	8488 KB	Output is correct
10	Correct	252 ms	8488 KB	Output is correct
11	Correct	254 ms	8528 KB	Output is correct
12	Correct	263 ms	8544 KB	Output is correct
13	Correct	268 ms	8544 KB	Output is correct
14	Correct	252 ms	8544 KB	Output is correct
15	Correct	264 ms	8544 KB	Output is correct
16	Correct	98 ms	8544 KB	Output is correct
17	Correct	106 ms	8544 KB	Output is correct
18	Correct	103 ms	8544 KB	Output is correct
19	Correct	113 ms	8544 KB	Output is correct
20	Correct	102 ms	8544 KB	Output is correct
21	Correct	414 ms	8544 KB	Output is correct
22	Correct	393 ms	8544 KB	Output is correct
23	Correct	446 ms	8544 KB	Output is correct
24	Correct	416 ms	8544 KB	Output is correct
25	Correct	483 ms	8544 KB	Output is correct
26	Correct	545 ms	8544 KB	Output is correct
27	Correct	556 ms	8544 KB	Output is correct
28	Correct	456 ms	8544 KB	Output is correct
29	Correct	522 ms	8544 KB	Output is correct
30	Correct	275 ms	8544 KB	Output is correct
31	Correct	292 ms	8544 KB	Output is correct
32	Correct	287 ms	8544 KB	Output is correct
33	Correct	285 ms	8544 KB	Output is correct
34	Correct	266 ms	8552 KB	Output is correct
35	Correct	578 ms	8552 KB	Output is correct
36	Correct	576 ms	8552 KB	Output is correct
37	Correct	597 ms	8552 KB	Output is correct
38	Correct	575 ms	8552 KB	Output is correct
39	Correct	8 ms	8552 KB	Output is correct
40	Correct	8 ms	8552 KB	Output is correct
41	Correct	9 ms	8552 KB	Output is correct
42	Correct	11 ms	8552 KB	Output is correct
43	Correct	9 ms	8552 KB	Output is correct
44	Correct	11 ms	8552 KB	Output is correct
45	Correct	9 ms	8552 KB	Output is correct
46	Correct	12 ms	8552 KB	Output is correct
47	Correct	9 ms	8552 KB	Output is correct
48	Correct	9 ms	8552 KB	Output is correct
49	Correct	9 ms	8552 KB	Output is correct
50	Correct	9 ms	8552 KB	Output is correct
51	Correct	9 ms	8552 KB	Output is correct
52	Correct	8 ms	8552 KB	Output is correct
53	Correct	9 ms	8552 KB	Output is correct
54	Correct	7 ms	8552 KB	Output is correct
55	Correct	6 ms	8552 KB	Output is correct
56	Correct	6 ms	8552 KB	Output is correct
57	Correct	6 ms	8552 KB	Output is correct
58	Correct	6 ms	8552 KB	Output is correct
59	Correct	444 ms	8552 KB	Output is correct
60	Correct	502 ms	8560 KB	Output is correct
61	Correct	482 ms	8560 KB	Output is correct
62	Correct	434 ms	8560 KB	Output is correct
63	Correct	428 ms	8560 KB	Output is correct
64	Correct	537 ms	8560 KB	Output is correct
65	Correct	454 ms	8560 KB	Output is correct
66	Correct	449 ms	8560 KB	Output is correct
67	Correct	474 ms	8560 KB	Output is correct
68	Correct	623 ms	8560 KB	Output is correct
69	Correct	430 ms	8560 KB	Output is correct
70	Correct	451 ms	8676 KB	Output is correct
71	Correct	438 ms	8676 KB	Output is correct
72	Correct	441 ms	8676 KB	Output is correct
73	Correct	492 ms	8676 KB	Output is correct
74	Correct	100 ms	8676 KB	Output is correct
75	Correct	101 ms	8676 KB	Output is correct
76	Correct	102 ms	8676 KB	Output is correct
77	Correct	101 ms	8676 KB	Output is correct
78	Correct	108 ms	8676 KB	Output is correct

Submission #51627

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