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Submission #36802

# Submission time Handle Problem Language Result Execution time Memory
36802 2017-12-14T18:57:33 Z imaxblue Boat (APIO16_boat) C++14
100 / 100
 1109 ms 26252 KB 
#include <iostream>
#include<map>
#include<cstdio>
#include<set>
using namespace std;
#define MN 1000000007
#define mult(a, b) a*1LL*b%MN
#define x first
#define ll long long
#define ub upper_bound
#define y second

short l2, l3,n, p, c;
bool k[505][1005];
int a[505], b[505], rev[1005], ncr2[1005][505];
ll ans, dp[1005][1005], t[1005][1005],
    ncr[1005][505], ncrt[505][505], cnt[1005];
map<int, short> m;
//set<int> s;
int main() {
	cin >> n;
	for (short l=1; l<=n; ++l){
		scanf("%i%i", &a[l], &b[l]); b[l]++;
		if (m.count(a[l])==0) m[a[l]]=0;
		if (m.count(b[l])==0) m[b[l]]=0;
		m[a[l]]++; m[b[l]]--; //s.insert(a[l]); s.insert(b[l]);
	}
	for (auto i:m){
	    c+=i.y;
        rev[m[i.x]=++p]=i.x;
        cnt[p]=c;
	}
	c=0;
	for (short l=1; l<m.size(); ++l){
		ncr[l][0]=1;
		for (l2=1; l2<=cnt[l]; ++l2){
            if (l2>rev[l+1]-rev[l]+1) break;
			ncr[l][l2]=(ncr[l][l2-1]*(rev[l+1]-rev[l]+1-l2))%MN;
			while(ncr[l][l2]%l2) ncr[l][l2]+=MN;
			ncr[l][l2]=(ncr[l][l2]/l2)%MN;
		}
	}
	for (short l=0; l<=500; ++l){
        ncrt[l][0]=1;
        for (l2=1; l2<=l; ++l2){
            ncrt[l][l2]=(ncrt[l][l2-1]*(l+1-l2))%MN;
			while(ncrt[l][l2]%l2) ncrt[l][l2]+=MN;
			ncrt[l][l2]=(ncrt[l][l2]/l2)%MN;
        }
	}
	for (short l=1; l<m.size(); ++l){
        for (l2=2; l2<=cnt[l]; ++l2){
            for (l3=2; l3<=l2; ++l3){
                ncr2[l][l2]=(ncr2[l][l2]+ncr[l][l3]*ncrt[l2-2][l3-2])%MN;
            }
        }
	}
	for (short l=1; l<=n; ++l){
		a[l]=m[a[l]]; b[l]=m[b[l]];
		for (l2=1; l2<a[l]; ++l2){
			t[l][l2]=(t[l-1][l2]+t[l][l2-1]-t[l-1][l2-1])%MN;
			if (t[l][l2]<0) t[l][l2]+=MN;
		}
		for (l2=a[l]; l2<b[l]; ++l2){
            c=k[l][l2]=1;
			dp[l][l2]=(dp[l][l2]+(t[l-1][l2-1]+1)*ncr[l2][1])%MN;
			//cout << dp[l][l2] << ' ' ;
			for (l3=l-1; l3>0; --l3){
				if (k[l3][l2])
				dp[l][l2]=(dp[l][l2]+(t[l3-1][l2-1]+1)*ncr2[l2][++c])%MN;
			}
			t[l][l2]=(t[l-1][l2]+t[l][l2-1]-t[l-1][l2-1]+dp[l][l2])%MN;
			ans=(ans+dp[l][l2])%MN;
		}
		for (l2=b[l]; l2<m.size(); ++l2){
			t[l][l2]=(t[l-1][l2]+t[l][l2-1]-t[l-1][l2-1])%MN;
			if (t[l][l2]<0) t[l][l2]+=MN;
			//cout << t[l][l2] << ' ';
		}
		//cout << endl;
	}
	cout << ans;
	return 0;
}

Compilation message

boat.cpp: In function 'int main()':
boat.cpp:34:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (short l=1; l<m.size(); ++l){
                   ^
boat.cpp:51:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (short l=1; l<m.size(); ++l){
                   ^
boat.cpp:75:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (l2=b[l]; l2<m.size(); ++l2){
                   ^
boat.cpp:23:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%i%i", &a[l], &b[l]); b[l]++;
                              ^

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 136 ms 26252 KB Output is correct
2 Correct 136 ms 26252 KB Output is correct
3 Correct 149 ms 26252 KB Output is correct
4 Correct 146 ms 26252 KB Output is correct
5 Correct 146 ms 26252 KB Output is correct
6 Correct 153 ms 26252 KB Output is correct
7 Correct 146 ms 26252 KB Output is correct
8 Correct 143 ms 26252 KB Output is correct
9 Correct 139 ms 26252 KB Output is correct
10 Correct 143 ms 26252 KB Output is correct
11 Correct 143 ms 26252 KB Output is correct
12 Correct 136 ms 26252 KB Output is correct
13 Correct 139 ms 26252 KB Output is correct
14 Correct 139 ms 26252 KB Output is correct
15 Correct 136 ms 26252 KB Output is correct
16 Correct 129 ms 26252 KB Output is correct
17 Correct 146 ms 26252 KB Output is correct
18 Correct 136 ms 26252 KB Output is correct
19 Correct 146 ms 26252 KB Output is correct
20 Correct 153 ms 26252 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 136 ms 26252 KB Output is correct
2 Correct 136 ms 26252 KB Output is correct
3 Correct 149 ms 26252 KB Output is correct
4 Correct 146 ms 26252 KB Output is correct
5 Correct 146 ms 26252 KB Output is correct
6 Correct 153 ms 26252 KB Output is correct
7 Correct 146 ms 26252 KB Output is correct
8 Correct 143 ms 26252 KB Output is correct
9 Correct 139 ms 26252 KB Output is correct
10 Correct 143 ms 26252 KB Output is correct
11 Correct 143 ms 26252 KB Output is correct
12 Correct 136 ms 26252 KB Output is correct
13 Correct 139 ms 26252 KB Output is correct
14 Correct 139 ms 26252 KB Output is correct
15 Correct 136 ms 26252 KB Output is correct
16 Correct 129 ms 26252 KB Output is correct
17 Correct 146 ms 26252 KB Output is correct
18 Correct 136 ms 26252 KB Output is correct
19 Correct 146 ms 26252 KB Output is correct
20 Correct 153 ms 26252 KB Output is correct
21 Correct 429 ms 26252 KB Output is correct
22 Correct 473 ms 26252 KB Output is correct
23 Correct 399 ms 26252 KB Output is correct
24 Correct 426 ms 26252 KB Output is correct
25 Correct 453 ms 26252 KB Output is correct
26 Correct 723 ms 26252 KB Output is correct
27 Correct 756 ms 26252 KB Output is correct
28 Correct 726 ms 26252 KB Output is correct
29 Correct 746 ms 26252 KB Output is correct
30 Correct 143 ms 26252 KB Output is correct
31 Correct 139 ms 26252 KB Output is correct
32 Correct 146 ms 26252 KB Output is correct
33 Correct 133 ms 26252 KB Output is correct
34 Correct 143 ms 26252 KB Output is correct
35 Correct 149 ms 26252 KB Output is correct
36 Correct 149 ms 26252 KB Output is correct
37 Correct 143 ms 26252 KB Output is correct
38 Correct 149 ms 26252 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 156 ms 26252 KB Output is correct
2 Correct 146 ms 26252 KB Output is correct
3 Correct 139 ms 26252 KB Output is correct
4 Correct 149 ms 26252 KB Output is correct
5 Correct 153 ms 26252 KB Output is correct
6 Correct 139 ms 26252 KB Output is correct
7 Correct 146 ms 26252 KB Output is correct
8 Correct 149 ms 26252 KB Output is correct
9 Correct 146 ms 26252 KB Output is correct
10 Correct 146 ms 26252 KB Output is correct
11 Correct 143 ms 26252 KB Output is correct
12 Correct 139 ms 26252 KB Output is correct
13 Correct 169 ms 26252 KB Output is correct
14 Correct 136 ms 26252 KB Output is correct
15 Correct 146 ms 26252 KB Output is correct
16 Correct 143 ms 26252 KB Output is correct
17 Correct 143 ms 26252 KB Output is correct
18 Correct 139 ms 26252 KB Output is correct
19 Correct 139 ms 26252 KB Output is correct
20 Correct 143 ms 26252 KB Output is correct

Subtask #4
42.0 / 42.0

# Verdict Execution time Memory Grader output
1 Correct 136 ms 26252 KB Output is correct
2 Correct 136 ms 26252 KB Output is correct
3 Correct 149 ms 26252 KB Output is correct
4 Correct 146 ms 26252 KB Output is correct
5 Correct 146 ms 26252 KB Output is correct
6 Correct 153 ms 26252 KB Output is correct
7 Correct 146 ms 26252 KB Output is correct
8 Correct 143 ms 26252 KB Output is correct
9 Correct 139 ms 26252 KB Output is correct
10 Correct 143 ms 26252 KB Output is correct
11 Correct 143 ms 26252 KB Output is correct
12 Correct 136 ms 26252 KB Output is correct
13 Correct 139 ms 26252 KB Output is correct
14 Correct 139 ms 26252 KB Output is correct
15 Correct 136 ms 26252 KB Output is correct
16 Correct 129 ms 26252 KB Output is correct
17 Correct 146 ms 26252 KB Output is correct
18 Correct 136 ms 26252 KB Output is correct
19 Correct 146 ms 26252 KB Output is correct
20 Correct 153 ms 26252 KB Output is correct
21 Correct 429 ms 26252 KB Output is correct
22 Correct 473 ms 26252 KB Output is correct
23 Correct 399 ms 26252 KB Output is correct
24 Correct 426 ms 26252 KB Output is correct
25 Correct 453 ms 26252 KB Output is correct
26 Correct 723 ms 26252 KB Output is correct
27 Correct 756 ms 26252 KB Output is correct
28 Correct 726 ms 26252 KB Output is correct
29 Correct 746 ms 26252 KB Output is correct
30 Correct 143 ms 26252 KB Output is correct
31 Correct 139 ms 26252 KB Output is correct
32 Correct 146 ms 26252 KB Output is correct
33 Correct 133 ms 26252 KB Output is correct
34 Correct 143 ms 26252 KB Output is correct
35 Correct 149 ms 26252 KB Output is correct
36 Correct 149 ms 26252 KB Output is correct
37 Correct 143 ms 26252 KB Output is correct
38 Correct 149 ms 26252 KB Output is correct
39 Correct 156 ms 26252 KB Output is correct
40 Correct 146 ms 26252 KB Output is correct
41 Correct 139 ms 26252 KB Output is correct
42 Correct 149 ms 26252 KB Output is correct
43 Correct 153 ms 26252 KB Output is correct
44 Correct 139 ms 26252 KB Output is correct
45 Correct 146 ms 26252 KB Output is correct
46 Correct 149 ms 26252 KB Output is correct
47 Correct 146 ms 26252 KB Output is correct
48 Correct 146 ms 26252 KB Output is correct
49 Correct 143 ms 26252 KB Output is correct
50 Correct 139 ms 26252 KB Output is correct
51 Correct 169 ms 26252 KB Output is correct
52 Correct 136 ms 26252 KB Output is correct
53 Correct 146 ms 26252 KB Output is correct
54 Correct 143 ms 26252 KB Output is correct
55 Correct 143 ms 26252 KB Output is correct
56 Correct 139 ms 26252 KB Output is correct
57 Correct 139 ms 26252 KB Output is correct
58 Correct 143 ms 26252 KB Output is correct
59 Correct 596 ms 26252 KB Output is correct
60 Correct 573 ms 26252 KB Output is correct
61 Correct 519 ms 26252 KB Output is correct
62 Correct 643 ms 26252 KB Output is correct
63 Correct 593 ms 26252 KB Output is correct
64 Correct 1093 ms 26252 KB Output is correct
65 Correct 1086 ms 26252 KB Output is correct
66 Correct 1109 ms 26252 KB Output is correct
67 Correct 1109 ms 26252 KB Output is correct
68 Correct 1036 ms 26252 KB Output is correct
69 Correct 486 ms 26252 KB Output is correct
70 Correct 503 ms 26252 KB Output is correct
71 Correct 509 ms 26252 KB Output is correct
72 Correct 593 ms 26252 KB Output is correct
73 Correct 589 ms 26252 KB Output is correct
74 Correct 239 ms 26252 KB Output is correct
75 Correct 249 ms 26252 KB Output is correct
76 Correct 256 ms 26252 KB Output is correct
77 Correct 266 ms 26252 KB Output is correct
78 Correct 226 ms 26252 KB Output is correct