#include "railroad.h"
#include <set>
#include <algorithm>
#define INF 1000000007
std::set<long long> I;
std::vector<long long> Ic;
long long Fen[400005];
int Pa[400005];
int n;
typedef struct node node;
struct node
{
int u, v;
long long w;
};
int compareW(node a, node b)
{
return (a.w < b.w);
}
std::vector<node> E;
void update(int pos, int val)
{
for (; pos <= Ic.size(); pos += pos&-pos)
Fen[pos] += val;
}
long long query(int pos)
{
long long r = 0;
for (; pos > 0; pos -= pos&-pos)
r += Fen[pos];
return r;
}
int uf(int u)
{
return (Pa[u] == 0)?u:(Pa[u] = uf(Pa[u]));
}
void join(int u, int v)
{
// printf("Join %d (%d) %d (%d)\n", u, Ic[u - 1], v, Ic[v - 1]);
int pu = uf(u);
int pv = uf(v);
if (pu != pv)
Pa[pu] = pv;
}
long long plan_roller_coaster(std::vector<int> s, std::vector<int> t) {
n = (int) s.size();
int i;
I.insert(1);
I.insert(INF);
for (i = 0; i < n; i++)
{
I.insert(s[i]);
I.insert(t[i]);
}
std::set<long long>::iterator it;
for (it = I.begin(); it != I.end(); it++)
Ic.push_back(*it);
int u, v;
for (i = 0; i < n; i++)
{
u = std::lower_bound(Ic.begin(), Ic.end(), s[i]) - Ic.begin() + 1;
v = std::lower_bound(Ic.begin(), Ic.end(), t[i]) - Ic.begin() + 1;
update(u, 1);
update(v, -1);
join(u, v);
}
update(Ic.size(), 1);
update(1, -1);
join(Ic.size(), 1);
long long r, Ans = 0;
for (i = 1; i < Ic.size(); i++)
{
r = query(i);
// printf("r%d\n", r);
if (r > 0)
{
Ans += r*(Ic[i] - Ic[i - 1]);
}
if (r != 0)
{
join(i, i + 1);
}
E.push_back({i, i + 1, (Ic[i] - Ic[i - 1])});
}
std::sort(E.begin(), E.end(), compareW);
int pu, pv;
for (i = 0; i < E.size(); i++)
{
u = E[i].u;
v = E[i].v;
pu = uf(u);
pv = uf(v);
if (pu != pv)
{
// printf("Add %d (%d) %d (%d)\n", u, Ic[u - 1], v, Ic[v - 1]);
Pa[pu] = pv;
Ans += E[i].w;
}
}
return Ans;
}
Compilation message
railroad.cpp: In function 'void update(int, int)':
railroad.cpp:23:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (; pos <= Ic.size(); pos += pos&-pos)
^
railroad.cpp: In function 'long long int plan_roller_coaster(std::vector<int>, std::vector<int>)':
railroad.cpp:71:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (i = 1; i < Ic.size(); i++)
^
railroad.cpp:87:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (i = 0; i < E.size(); i++)
^
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
6628 KB |
n = 2 |
2 |
Correct |
0 ms |
6628 KB |
n = 2 |
3 |
Correct |
0 ms |
6628 KB |
n = 2 |
4 |
Correct |
0 ms |
6628 KB |
n = 2 |
5 |
Correct |
0 ms |
6628 KB |
n = 2 |
6 |
Correct |
0 ms |
6628 KB |
n = 2 |
7 |
Correct |
0 ms |
6628 KB |
n = 3 |
8 |
Correct |
0 ms |
6628 KB |
n = 3 |
9 |
Correct |
0 ms |
6628 KB |
n = 3 |
10 |
Correct |
0 ms |
6628 KB |
n = 8 |
11 |
Correct |
0 ms |
6628 KB |
n = 8 |
12 |
Correct |
0 ms |
6628 KB |
n = 8 |
13 |
Correct |
0 ms |
6628 KB |
n = 8 |
14 |
Correct |
0 ms |
6628 KB |
n = 8 |
15 |
Correct |
0 ms |
6628 KB |
n = 8 |
16 |
Correct |
0 ms |
6628 KB |
n = 8 |
17 |
Correct |
0 ms |
6628 KB |
n = 8 |
18 |
Correct |
0 ms |
6628 KB |
n = 8 |
19 |
Correct |
0 ms |
6628 KB |
n = 3 |
20 |
Correct |
0 ms |
6628 KB |
n = 7 |
21 |
Correct |
0 ms |
6628 KB |
n = 8 |
22 |
Correct |
0 ms |
6628 KB |
n = 8 |
23 |
Correct |
0 ms |
6628 KB |
n = 8 |
24 |
Correct |
0 ms |
6628 KB |
n = 8 |
25 |
Correct |
0 ms |
6628 KB |
n = 8 |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
6628 KB |
n = 2 |
2 |
Correct |
0 ms |
6628 KB |
n = 2 |
3 |
Correct |
0 ms |
6628 KB |
n = 2 |
4 |
Correct |
0 ms |
6628 KB |
n = 2 |
5 |
Correct |
0 ms |
6628 KB |
n = 2 |
6 |
Correct |
0 ms |
6628 KB |
n = 2 |
7 |
Correct |
0 ms |
6628 KB |
n = 3 |
8 |
Correct |
0 ms |
6628 KB |
n = 3 |
9 |
Correct |
0 ms |
6628 KB |
n = 3 |
10 |
Correct |
0 ms |
6628 KB |
n = 8 |
11 |
Correct |
0 ms |
6628 KB |
n = 8 |
12 |
Correct |
0 ms |
6628 KB |
n = 8 |
13 |
Correct |
0 ms |
6628 KB |
n = 8 |
14 |
Correct |
0 ms |
6628 KB |
n = 8 |
15 |
Correct |
0 ms |
6628 KB |
n = 8 |
16 |
Correct |
0 ms |
6628 KB |
n = 8 |
17 |
Correct |
0 ms |
6628 KB |
n = 8 |
18 |
Correct |
0 ms |
6628 KB |
n = 8 |
19 |
Correct |
0 ms |
6628 KB |
n = 3 |
20 |
Correct |
0 ms |
6628 KB |
n = 7 |
21 |
Correct |
0 ms |
6628 KB |
n = 8 |
22 |
Correct |
0 ms |
6628 KB |
n = 8 |
23 |
Correct |
0 ms |
6628 KB |
n = 8 |
24 |
Correct |
0 ms |
6628 KB |
n = 8 |
25 |
Correct |
0 ms |
6628 KB |
n = 8 |
26 |
Correct |
0 ms |
6628 KB |
n = 8 |
27 |
Correct |
0 ms |
6628 KB |
n = 8 |
28 |
Correct |
0 ms |
6628 KB |
n = 8 |
29 |
Correct |
0 ms |
6628 KB |
n = 16 |
30 |
Correct |
0 ms |
6628 KB |
n = 16 |
31 |
Correct |
0 ms |
6628 KB |
n = 16 |
32 |
Correct |
0 ms |
6628 KB |
n = 16 |
33 |
Correct |
0 ms |
6628 KB |
n = 16 |
34 |
Correct |
0 ms |
6628 KB |
n = 16 |
35 |
Correct |
0 ms |
6628 KB |
n = 16 |
36 |
Correct |
0 ms |
6628 KB |
n = 15 |
37 |
Correct |
0 ms |
6628 KB |
n = 8 |
38 |
Correct |
0 ms |
6628 KB |
n = 16 |
39 |
Correct |
0 ms |
6628 KB |
n = 16 |
40 |
Correct |
0 ms |
6628 KB |
n = 9 |
41 |
Correct |
0 ms |
6628 KB |
n = 16 |
42 |
Correct |
0 ms |
6628 KB |
n = 16 |
43 |
Correct |
0 ms |
6628 KB |
n = 16 |
44 |
Correct |
0 ms |
6628 KB |
n = 9 |
45 |
Correct |
0 ms |
6628 KB |
n = 15 |
46 |
Correct |
0 ms |
6628 KB |
n = 16 |
47 |
Correct |
0 ms |
6628 KB |
n = 16 |
48 |
Correct |
0 ms |
6628 KB |
n = 16 |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
786 ms |
44980 KB |
n = 199999 |
2 |
Correct |
826 ms |
44980 KB |
n = 199991 |
3 |
Correct |
606 ms |
44980 KB |
n = 199993 |
4 |
Correct |
446 ms |
39716 KB |
n = 152076 |
5 |
Correct |
229 ms |
25120 KB |
n = 93249 |
6 |
Correct |
573 ms |
41568 KB |
n = 199910 |
7 |
Correct |
453 ms |
44568 KB |
n = 199999 |
8 |
Correct |
429 ms |
41688 KB |
n = 199997 |
9 |
Correct |
509 ms |
41832 KB |
n = 171294 |
10 |
Correct |
566 ms |
38512 KB |
n = 140872 |
11 |
Correct |
609 ms |
41828 KB |
n = 199886 |
12 |
Correct |
633 ms |
44692 KB |
n = 199996 |
13 |
Correct |
639 ms |
42412 KB |
n = 200000 |
14 |
Correct |
499 ms |
44600 KB |
n = 199998 |
15 |
Correct |
693 ms |
44292 KB |
n = 200000 |
16 |
Correct |
716 ms |
44904 KB |
n = 199998 |
17 |
Correct |
606 ms |
47980 KB |
n = 200000 |
18 |
Correct |
576 ms |
43984 KB |
n = 190000 |
19 |
Correct |
583 ms |
45196 KB |
n = 177777 |
20 |
Correct |
216 ms |
25852 KB |
n = 100000 |
21 |
Correct |
556 ms |
44984 KB |
n = 200000 |
22 |
Correct |
653 ms |
44988 KB |
n = 200000 |
23 |
Correct |
639 ms |
44988 KB |
n = 200000 |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
6628 KB |
n = 2 |
2 |
Correct |
0 ms |
6628 KB |
n = 2 |
3 |
Correct |
0 ms |
6628 KB |
n = 2 |
4 |
Correct |
0 ms |
6628 KB |
n = 2 |
5 |
Correct |
0 ms |
6628 KB |
n = 2 |
6 |
Correct |
0 ms |
6628 KB |
n = 2 |
7 |
Correct |
0 ms |
6628 KB |
n = 3 |
8 |
Correct |
0 ms |
6628 KB |
n = 3 |
9 |
Correct |
0 ms |
6628 KB |
n = 3 |
10 |
Correct |
0 ms |
6628 KB |
n = 8 |
11 |
Correct |
0 ms |
6628 KB |
n = 8 |
12 |
Correct |
0 ms |
6628 KB |
n = 8 |
13 |
Correct |
0 ms |
6628 KB |
n = 8 |
14 |
Correct |
0 ms |
6628 KB |
n = 8 |
15 |
Correct |
0 ms |
6628 KB |
n = 8 |
16 |
Correct |
0 ms |
6628 KB |
n = 8 |
17 |
Correct |
0 ms |
6628 KB |
n = 8 |
18 |
Correct |
0 ms |
6628 KB |
n = 8 |
19 |
Correct |
0 ms |
6628 KB |
n = 3 |
20 |
Correct |
0 ms |
6628 KB |
n = 7 |
21 |
Correct |
0 ms |
6628 KB |
n = 8 |
22 |
Correct |
0 ms |
6628 KB |
n = 8 |
23 |
Correct |
0 ms |
6628 KB |
n = 8 |
24 |
Correct |
0 ms |
6628 KB |
n = 8 |
25 |
Correct |
0 ms |
6628 KB |
n = 8 |
26 |
Correct |
0 ms |
6628 KB |
n = 8 |
27 |
Correct |
0 ms |
6628 KB |
n = 8 |
28 |
Correct |
0 ms |
6628 KB |
n = 8 |
29 |
Correct |
0 ms |
6628 KB |
n = 16 |
30 |
Correct |
0 ms |
6628 KB |
n = 16 |
31 |
Correct |
0 ms |
6628 KB |
n = 16 |
32 |
Correct |
0 ms |
6628 KB |
n = 16 |
33 |
Correct |
0 ms |
6628 KB |
n = 16 |
34 |
Correct |
0 ms |
6628 KB |
n = 16 |
35 |
Correct |
0 ms |
6628 KB |
n = 16 |
36 |
Correct |
0 ms |
6628 KB |
n = 15 |
37 |
Correct |
0 ms |
6628 KB |
n = 8 |
38 |
Correct |
0 ms |
6628 KB |
n = 16 |
39 |
Correct |
0 ms |
6628 KB |
n = 16 |
40 |
Correct |
0 ms |
6628 KB |
n = 9 |
41 |
Correct |
0 ms |
6628 KB |
n = 16 |
42 |
Correct |
0 ms |
6628 KB |
n = 16 |
43 |
Correct |
0 ms |
6628 KB |
n = 16 |
44 |
Correct |
0 ms |
6628 KB |
n = 9 |
45 |
Correct |
0 ms |
6628 KB |
n = 15 |
46 |
Correct |
0 ms |
6628 KB |
n = 16 |
47 |
Correct |
0 ms |
6628 KB |
n = 16 |
48 |
Correct |
0 ms |
6628 KB |
n = 16 |
49 |
Correct |
786 ms |
44980 KB |
n = 199999 |
50 |
Correct |
826 ms |
44980 KB |
n = 199991 |
51 |
Correct |
606 ms |
44980 KB |
n = 199993 |
52 |
Correct |
446 ms |
39716 KB |
n = 152076 |
53 |
Correct |
229 ms |
25120 KB |
n = 93249 |
54 |
Correct |
573 ms |
41568 KB |
n = 199910 |
55 |
Correct |
453 ms |
44568 KB |
n = 199999 |
56 |
Correct |
429 ms |
41688 KB |
n = 199997 |
57 |
Correct |
509 ms |
41832 KB |
n = 171294 |
58 |
Correct |
566 ms |
38512 KB |
n = 140872 |
59 |
Correct |
609 ms |
41828 KB |
n = 199886 |
60 |
Correct |
633 ms |
44692 KB |
n = 199996 |
61 |
Correct |
639 ms |
42412 KB |
n = 200000 |
62 |
Correct |
499 ms |
44600 KB |
n = 199998 |
63 |
Correct |
693 ms |
44292 KB |
n = 200000 |
64 |
Correct |
716 ms |
44904 KB |
n = 199998 |
65 |
Correct |
606 ms |
47980 KB |
n = 200000 |
66 |
Correct |
576 ms |
43984 KB |
n = 190000 |
67 |
Correct |
583 ms |
45196 KB |
n = 177777 |
68 |
Correct |
216 ms |
25852 KB |
n = 100000 |
69 |
Correct |
556 ms |
44984 KB |
n = 200000 |
70 |
Correct |
653 ms |
44988 KB |
n = 200000 |
71 |
Correct |
639 ms |
44988 KB |
n = 200000 |
72 |
Correct |
763 ms |
44984 KB |
n = 200000 |
73 |
Correct |
939 ms |
44984 KB |
n = 200000 |
74 |
Correct |
893 ms |
44984 KB |
n = 200000 |
75 |
Correct |
759 ms |
44984 KB |
n = 200000 |
76 |
Correct |
629 ms |
44984 KB |
n = 200000 |
77 |
Correct |
309 ms |
28364 KB |
n = 200000 |
78 |
Correct |
339 ms |
27420 KB |
n = 200000 |
79 |
Correct |
816 ms |
43244 KB |
n = 184307 |
80 |
Correct |
279 ms |
23236 KB |
n = 76040 |
81 |
Correct |
726 ms |
41832 KB |
n = 199981 |
82 |
Correct |
619 ms |
44684 KB |
n = 199994 |
83 |
Correct |
746 ms |
42424 KB |
n = 199996 |
84 |
Correct |
453 ms |
44592 KB |
n = 199998 |
85 |
Correct |
449 ms |
44296 KB |
n = 200000 |
86 |
Correct |
503 ms |
44900 KB |
n = 199998 |
87 |
Correct |
576 ms |
47984 KB |
n = 200000 |
88 |
Correct |
589 ms |
45528 KB |
n = 200000 |
89 |
Correct |
809 ms |
47984 KB |
n = 200000 |
90 |
Correct |
826 ms |
44984 KB |
n = 200000 |
91 |
Correct |
663 ms |
44988 KB |
n = 200000 |
92 |
Correct |
579 ms |
44988 KB |
n = 200000 |