using namespace std;
#include <bits/stdc++.h>
//#include "shoes.h"
using ll = long long;
struct BIT {
vector<int> bit; // binary indexed tree
int n;
BIT(int n) {
this->n = n;
bit.assign(n, 0);
}
BIT(vector<int> a) : BIT(a.size()) {
for (size_t i = 0; i < a.size(); i++)
add(i, a[i]);
}
int sum(int r) {
int ret = 0;
for (; r >= 0; r = (r & (r + 1)) - 1)
ret += bit[r];
return ret;
}
int sum(int l, int r) {
return sum(r) - sum(l - 1);
}
void add(int idx, int delta) {
for (; idx < n; idx = idx | (idx + 1))
bit[idx] += delta;
}
};
ll count_swaps(vector<int>s) {
int n=s.size()/2;
/*
if (n==1) {
return s[0]>0;
}
int foo=1; int x=abs(s[0]);
for (int i=1; i<2*n; ++i) {
foo&=abs(s[i])==x;
}
if (foo) {
int j=0;
ll ans=0;
for (int i=0; i<2*n; ++i) {
if (s[i]<0) {
ans+=abs(i-2*j);
++j;
}
}
return ans;
}
foo=1;
for (int i=0; i<n; ++i) {
foo&= ( s[i]<0 && (abs(s[i])==abs(s[i+n])) && s[i+n]>0 );
}
if (foo) {
return 1ll*n*(n-1)/2;
} */
ll ans=0;
BIT ft(2*n+10);
for (int i=0; i<2*n; ++i) { ft.add(i,i); ft.add(i+1,-i); }
vector<int> vis(2*n,0);
//for (int i=0; i<2*n; ++i) cout<<ft.sum(0,i)<<' '; cout<<'\n';
map<int,queue<int>> m;
for (int i=0; i<2*n; ++i) m[s[i]].push(i);
for (int i=0; i<2*n; ++i) {
if (vis[i]) continue;
vis[i]=1;
int x=s[i];
m[x].pop();
int j=m[-x].front();
m[-x].pop();
int y=ft.sum(0,i);
int z=ft.sum(0,j);
ans+=z-y-1;
ans+=s[i]>0;
vis[j]=1;
//cout<<i<<' '<<j<<' '<<y<<' '<<z<<' '<<ans<<'\n';
ft.add(i,1);
ft.add(j,-1);
//for (int i=0; i<2*n; ++i) cout<<ft.sum(0,i)<<' '; cout<<'\n';
}
return ans;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
300 KB |
Output is correct |
4 |
Correct |
0 ms |
212 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
212 KB |
Output is correct |
7 |
Correct |
0 ms |
212 KB |
Output is correct |
8 |
Correct |
1 ms |
212 KB |
Output is correct |
9 |
Correct |
1 ms |
212 KB |
Output is correct |
10 |
Correct |
0 ms |
212 KB |
Output is correct |
11 |
Correct |
1 ms |
212 KB |
Output is correct |
12 |
Correct |
1 ms |
212 KB |
Output is correct |
13 |
Correct |
1 ms |
212 KB |
Output is correct |
14 |
Correct |
0 ms |
340 KB |
Output is correct |
15 |
Correct |
0 ms |
300 KB |
Output is correct |
16 |
Correct |
0 ms |
212 KB |
Output is correct |
17 |
Correct |
0 ms |
212 KB |
Output is correct |
18 |
Correct |
0 ms |
300 KB |
Output is correct |
19 |
Correct |
0 ms |
212 KB |
Output is correct |
20 |
Correct |
0 ms |
292 KB |
Output is correct |
21 |
Correct |
1 ms |
212 KB |
Output is correct |
22 |
Correct |
0 ms |
212 KB |
Output is correct |
23 |
Correct |
0 ms |
212 KB |
Output is correct |
24 |
Correct |
0 ms |
212 KB |
Output is correct |
25 |
Correct |
1 ms |
300 KB |
Output is correct |
26 |
Correct |
1 ms |
212 KB |
Output is correct |
27 |
Correct |
0 ms |
212 KB |
Output is correct |
28 |
Correct |
1 ms |
212 KB |
Output is correct |
29 |
Correct |
1 ms |
212 KB |
Output is correct |
30 |
Correct |
0 ms |
212 KB |
Output is correct |
31 |
Correct |
1 ms |
212 KB |
Output is correct |
32 |
Correct |
0 ms |
212 KB |
Output is correct |
33 |
Correct |
0 ms |
212 KB |
Output is correct |
34 |
Correct |
1 ms |
212 KB |
Output is correct |
35 |
Correct |
1 ms |
212 KB |
Output is correct |
36 |
Correct |
0 ms |
300 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
1 ms |
300 KB |
Output is correct |
4 |
Correct |
1 ms |
212 KB |
Output is correct |
5 |
Correct |
0 ms |
304 KB |
Output is correct |
6 |
Correct |
1 ms |
212 KB |
Output is correct |
7 |
Correct |
0 ms |
212 KB |
Output is correct |
8 |
Correct |
1 ms |
212 KB |
Output is correct |
9 |
Correct |
0 ms |
212 KB |
Output is correct |
10 |
Correct |
1 ms |
212 KB |
Output is correct |
11 |
Correct |
0 ms |
212 KB |
Output is correct |
12 |
Correct |
1 ms |
212 KB |
Output is correct |
13 |
Correct |
1 ms |
212 KB |
Output is correct |
14 |
Correct |
0 ms |
212 KB |
Output is correct |
15 |
Correct |
1 ms |
212 KB |
Output is correct |
16 |
Correct |
1 ms |
212 KB |
Output is correct |
17 |
Correct |
1 ms |
212 KB |
Output is correct |
18 |
Correct |
1 ms |
340 KB |
Output is correct |
19 |
Correct |
1 ms |
308 KB |
Output is correct |
20 |
Correct |
3 ms |
696 KB |
Output is correct |
21 |
Correct |
3 ms |
724 KB |
Output is correct |
22 |
Correct |
29 ms |
5428 KB |
Output is correct |
23 |
Correct |
27 ms |
5428 KB |
Output is correct |
24 |
Correct |
29 ms |
5460 KB |
Output is correct |
25 |
Correct |
24 ms |
5304 KB |
Output is correct |
26 |
Correct |
29 ms |
5420 KB |
Output is correct |
27 |
Correct |
22 ms |
5304 KB |
Output is correct |
28 |
Correct |
25 ms |
5524 KB |
Output is correct |
29 |
Correct |
24 ms |
5424 KB |
Output is correct |
30 |
Correct |
24 ms |
5424 KB |
Output is correct |
31 |
Correct |
28 ms |
5432 KB |
Output is correct |
32 |
Correct |
25 ms |
5420 KB |
Output is correct |
33 |
Correct |
23 ms |
5300 KB |
Output is correct |
34 |
Correct |
24 ms |
5460 KB |
Output is correct |
35 |
Correct |
0 ms |
212 KB |
Output is correct |
36 |
Correct |
0 ms |
212 KB |
Output is correct |
37 |
Correct |
25 ms |
5428 KB |
Output is correct |
38 |
Correct |
24 ms |
5420 KB |
Output is correct |
39 |
Correct |
24 ms |
5452 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
304 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
300 KB |
Output is correct |
4 |
Correct |
0 ms |
212 KB |
Output is correct |
5 |
Correct |
417 ms |
148652 KB |
Output is correct |
6 |
Correct |
99 ms |
17200 KB |
Output is correct |
7 |
Correct |
408 ms |
148576 KB |
Output is correct |
8 |
Correct |
27 ms |
5420 KB |
Output is correct |
9 |
Correct |
406 ms |
148640 KB |
Output is correct |
10 |
Correct |
277 ms |
76624 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
300 KB |
Output is correct |
4 |
Correct |
0 ms |
212 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
212 KB |
Output is correct |
7 |
Correct |
0 ms |
212 KB |
Output is correct |
8 |
Correct |
1 ms |
212 KB |
Output is correct |
9 |
Correct |
1 ms |
212 KB |
Output is correct |
10 |
Correct |
0 ms |
212 KB |
Output is correct |
11 |
Correct |
1 ms |
212 KB |
Output is correct |
12 |
Correct |
1 ms |
212 KB |
Output is correct |
13 |
Correct |
1 ms |
212 KB |
Output is correct |
14 |
Correct |
0 ms |
340 KB |
Output is correct |
15 |
Correct |
0 ms |
300 KB |
Output is correct |
16 |
Correct |
0 ms |
212 KB |
Output is correct |
17 |
Correct |
0 ms |
212 KB |
Output is correct |
18 |
Correct |
0 ms |
300 KB |
Output is correct |
19 |
Correct |
0 ms |
212 KB |
Output is correct |
20 |
Correct |
0 ms |
292 KB |
Output is correct |
21 |
Correct |
1 ms |
212 KB |
Output is correct |
22 |
Correct |
0 ms |
212 KB |
Output is correct |
23 |
Correct |
0 ms |
212 KB |
Output is correct |
24 |
Correct |
0 ms |
212 KB |
Output is correct |
25 |
Correct |
1 ms |
300 KB |
Output is correct |
26 |
Correct |
1 ms |
212 KB |
Output is correct |
27 |
Correct |
0 ms |
212 KB |
Output is correct |
28 |
Correct |
1 ms |
212 KB |
Output is correct |
29 |
Correct |
1 ms |
212 KB |
Output is correct |
30 |
Correct |
0 ms |
212 KB |
Output is correct |
31 |
Correct |
1 ms |
212 KB |
Output is correct |
32 |
Correct |
0 ms |
212 KB |
Output is correct |
33 |
Correct |
0 ms |
212 KB |
Output is correct |
34 |
Correct |
1 ms |
212 KB |
Output is correct |
35 |
Correct |
1 ms |
212 KB |
Output is correct |
36 |
Correct |
0 ms |
300 KB |
Output is correct |
37 |
Correct |
0 ms |
296 KB |
Output is correct |
38 |
Correct |
1 ms |
340 KB |
Output is correct |
39 |
Correct |
1 ms |
340 KB |
Output is correct |
40 |
Correct |
1 ms |
596 KB |
Output is correct |
41 |
Correct |
2 ms |
1712 KB |
Output is correct |
42 |
Correct |
2 ms |
1748 KB |
Output is correct |
43 |
Correct |
2 ms |
1592 KB |
Output is correct |
44 |
Correct |
2 ms |
1364 KB |
Output is correct |
45 |
Correct |
2 ms |
1236 KB |
Output is correct |
46 |
Correct |
1 ms |
1072 KB |
Output is correct |
47 |
Correct |
2 ms |
944 KB |
Output is correct |
48 |
Correct |
1 ms |
692 KB |
Output is correct |
49 |
Correct |
1 ms |
596 KB |
Output is correct |
50 |
Correct |
1 ms |
340 KB |
Output is correct |
51 |
Correct |
1 ms |
340 KB |
Output is correct |
52 |
Correct |
2 ms |
1748 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
300 KB |
Output is correct |
4 |
Correct |
0 ms |
212 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
212 KB |
Output is correct |
7 |
Correct |
0 ms |
212 KB |
Output is correct |
8 |
Correct |
1 ms |
212 KB |
Output is correct |
9 |
Correct |
1 ms |
212 KB |
Output is correct |
10 |
Correct |
0 ms |
212 KB |
Output is correct |
11 |
Correct |
1 ms |
212 KB |
Output is correct |
12 |
Correct |
1 ms |
212 KB |
Output is correct |
13 |
Correct |
1 ms |
212 KB |
Output is correct |
14 |
Correct |
0 ms |
340 KB |
Output is correct |
15 |
Correct |
0 ms |
300 KB |
Output is correct |
16 |
Correct |
0 ms |
212 KB |
Output is correct |
17 |
Correct |
0 ms |
212 KB |
Output is correct |
18 |
Correct |
0 ms |
300 KB |
Output is correct |
19 |
Correct |
0 ms |
212 KB |
Output is correct |
20 |
Correct |
0 ms |
292 KB |
Output is correct |
21 |
Correct |
1 ms |
212 KB |
Output is correct |
22 |
Correct |
0 ms |
212 KB |
Output is correct |
23 |
Correct |
0 ms |
212 KB |
Output is correct |
24 |
Correct |
0 ms |
212 KB |
Output is correct |
25 |
Correct |
1 ms |
300 KB |
Output is correct |
26 |
Correct |
1 ms |
212 KB |
Output is correct |
27 |
Correct |
0 ms |
212 KB |
Output is correct |
28 |
Correct |
1 ms |
212 KB |
Output is correct |
29 |
Correct |
1 ms |
212 KB |
Output is correct |
30 |
Correct |
0 ms |
212 KB |
Output is correct |
31 |
Correct |
1 ms |
212 KB |
Output is correct |
32 |
Correct |
0 ms |
212 KB |
Output is correct |
33 |
Correct |
0 ms |
212 KB |
Output is correct |
34 |
Correct |
1 ms |
212 KB |
Output is correct |
35 |
Correct |
1 ms |
212 KB |
Output is correct |
36 |
Correct |
0 ms |
300 KB |
Output is correct |
37 |
Correct |
1 ms |
300 KB |
Output is correct |
38 |
Correct |
1 ms |
212 KB |
Output is correct |
39 |
Correct |
0 ms |
304 KB |
Output is correct |
40 |
Correct |
1 ms |
212 KB |
Output is correct |
41 |
Correct |
0 ms |
212 KB |
Output is correct |
42 |
Correct |
1 ms |
212 KB |
Output is correct |
43 |
Correct |
0 ms |
212 KB |
Output is correct |
44 |
Correct |
1 ms |
212 KB |
Output is correct |
45 |
Correct |
0 ms |
212 KB |
Output is correct |
46 |
Correct |
1 ms |
212 KB |
Output is correct |
47 |
Correct |
1 ms |
212 KB |
Output is correct |
48 |
Correct |
0 ms |
212 KB |
Output is correct |
49 |
Correct |
1 ms |
212 KB |
Output is correct |
50 |
Correct |
1 ms |
212 KB |
Output is correct |
51 |
Correct |
1 ms |
212 KB |
Output is correct |
52 |
Correct |
1 ms |
340 KB |
Output is correct |
53 |
Correct |
1 ms |
308 KB |
Output is correct |
54 |
Correct |
3 ms |
696 KB |
Output is correct |
55 |
Correct |
3 ms |
724 KB |
Output is correct |
56 |
Correct |
29 ms |
5428 KB |
Output is correct |
57 |
Correct |
27 ms |
5428 KB |
Output is correct |
58 |
Correct |
29 ms |
5460 KB |
Output is correct |
59 |
Correct |
24 ms |
5304 KB |
Output is correct |
60 |
Correct |
29 ms |
5420 KB |
Output is correct |
61 |
Correct |
22 ms |
5304 KB |
Output is correct |
62 |
Correct |
25 ms |
5524 KB |
Output is correct |
63 |
Correct |
24 ms |
5424 KB |
Output is correct |
64 |
Correct |
24 ms |
5424 KB |
Output is correct |
65 |
Correct |
28 ms |
5432 KB |
Output is correct |
66 |
Correct |
25 ms |
5420 KB |
Output is correct |
67 |
Correct |
23 ms |
5300 KB |
Output is correct |
68 |
Correct |
24 ms |
5460 KB |
Output is correct |
69 |
Correct |
0 ms |
212 KB |
Output is correct |
70 |
Correct |
0 ms |
212 KB |
Output is correct |
71 |
Correct |
25 ms |
5428 KB |
Output is correct |
72 |
Correct |
24 ms |
5420 KB |
Output is correct |
73 |
Correct |
24 ms |
5452 KB |
Output is correct |
74 |
Correct |
0 ms |
304 KB |
Output is correct |
75 |
Correct |
0 ms |
212 KB |
Output is correct |
76 |
Correct |
0 ms |
300 KB |
Output is correct |
77 |
Correct |
0 ms |
212 KB |
Output is correct |
78 |
Correct |
417 ms |
148652 KB |
Output is correct |
79 |
Correct |
99 ms |
17200 KB |
Output is correct |
80 |
Correct |
408 ms |
148576 KB |
Output is correct |
81 |
Correct |
27 ms |
5420 KB |
Output is correct |
82 |
Correct |
406 ms |
148640 KB |
Output is correct |
83 |
Correct |
277 ms |
76624 KB |
Output is correct |
84 |
Correct |
0 ms |
296 KB |
Output is correct |
85 |
Correct |
1 ms |
340 KB |
Output is correct |
86 |
Correct |
1 ms |
340 KB |
Output is correct |
87 |
Correct |
1 ms |
596 KB |
Output is correct |
88 |
Correct |
2 ms |
1712 KB |
Output is correct |
89 |
Correct |
2 ms |
1748 KB |
Output is correct |
90 |
Correct |
2 ms |
1592 KB |
Output is correct |
91 |
Correct |
2 ms |
1364 KB |
Output is correct |
92 |
Correct |
2 ms |
1236 KB |
Output is correct |
93 |
Correct |
1 ms |
1072 KB |
Output is correct |
94 |
Correct |
2 ms |
944 KB |
Output is correct |
95 |
Correct |
1 ms |
692 KB |
Output is correct |
96 |
Correct |
1 ms |
596 KB |
Output is correct |
97 |
Correct |
1 ms |
340 KB |
Output is correct |
98 |
Correct |
1 ms |
340 KB |
Output is correct |
99 |
Correct |
2 ms |
1748 KB |
Output is correct |
100 |
Correct |
2 ms |
1748 KB |
Output is correct |
101 |
Correct |
20 ms |
13612 KB |
Output is correct |
102 |
Correct |
9 ms |
3540 KB |
Output is correct |
103 |
Correct |
477 ms |
148704 KB |
Output is correct |
104 |
Correct |
426 ms |
148716 KB |
Output is correct |
105 |
Correct |
358 ms |
86440 KB |
Output is correct |
106 |
Correct |
400 ms |
148700 KB |
Output is correct |
107 |
Correct |
118 ms |
20684 KB |
Output is correct |
108 |
Correct |
177 ms |
36584 KB |
Output is correct |
109 |
Correct |
26 ms |
5420 KB |
Output is correct |
110 |
Correct |
25 ms |
5460 KB |
Output is correct |
111 |
Correct |
373 ms |
132696 KB |
Output is correct |
112 |
Correct |
401 ms |
116740 KB |
Output is correct |
113 |
Correct |
119 ms |
22416 KB |
Output is correct |
114 |
Correct |
412 ms |
148684 KB |
Output is correct |
115 |
Correct |
410 ms |
148684 KB |
Output is correct |