#include <bits/stdc++.h>
typedef long long ll;
using namespace std;
template <typename T>
struct FenwickTree {
int n;
vector<T> bit;
FenwickTree(int n): n(n), bit(n, 0) {};
FenwickTree(vector<T> & init): n((int) init.size()), bit((int) init.size()) {
copy(init.begin(), init.end(), bit.begin());
for(int i = 1; i <= n; i++) {
if(i + (i & -i) <= n) {
bit[i + (i & -i) - 1] += bit[i - 1];
}
}
}
T qry(int k) {
T ret = 0;
for(k++; k > 0; k -= k & -k) {
ret += bit[k - 1];
}
return ret;
}
T qry(int l, int r) {
return qry(r) - qry(l - 1);
}
void upd(int k, T x) {
for(k++; k <= n; k += k & -k) {
bit[k - 1] += x;
}
}
};
ll count_swaps(vector<int> S) {
int n = S.size();
ll ans = 0;
FenwickTree<int> ft(n);
vector<queue<int>> lefts(n / 2), rights(n / 2);
vector<bool> done(n, false);
for(int i = 0; i < n; i++) {
ft.upd(i, 1);
if(S[i] < 0) {
lefts[-S[i] - 1].push(i);
} else {
rights[S[i] - 1].push(i);
}
}
for(int i = 0, j = 0; i < n / 2; i++) {
while(done[j]) {
++j;
}
int left_thing, right_thing;
if(S[j] < 0) {
left_thing = j, right_thing = rights[-S[j] - 1].front();
} else {
left_thing = lefts[S[j] - 1].front(), right_thing = j;
}
lefts[abs(S[j]) - 1].pop(), rights[abs(S[j]) - 1].pop(), done[left_thing] = done[right_thing] = true;
ft.upd(left_thing, -1); ans += ft.qry(left_thing);
ft.upd(right_thing, -1); ans += ft.qry(right_thing);
}
return ans;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
300 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
300 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
1 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 |
1 ms |
212 KB |
Output is correct |
8 |
Correct |
0 ms |
212 KB |
Output is correct |
9 |
Correct |
1 ms |
224 KB |
Output is correct |
10 |
Correct |
0 ms |
304 KB |
Output is correct |
11 |
Correct |
0 ms |
212 KB |
Output is correct |
12 |
Correct |
0 ms |
212 KB |
Output is correct |
13 |
Correct |
0 ms |
300 KB |
Output is correct |
14 |
Correct |
0 ms |
212 KB |
Output is correct |
15 |
Correct |
0 ms |
212 KB |
Output is correct |
16 |
Correct |
1 ms |
212 KB |
Output is correct |
17 |
Correct |
0 ms |
212 KB |
Output is correct |
18 |
Correct |
0 ms |
212 KB |
Output is correct |
19 |
Correct |
1 ms |
212 KB |
Output is correct |
20 |
Correct |
0 ms |
212 KB |
Output is correct |
21 |
Correct |
0 ms |
296 KB |
Output is correct |
22 |
Correct |
1 ms |
212 KB |
Output is correct |
23 |
Correct |
0 ms |
212 KB |
Output is correct |
24 |
Correct |
1 ms |
212 KB |
Output is correct |
25 |
Correct |
0 ms |
212 KB |
Output is correct |
26 |
Correct |
0 ms |
296 KB |
Output is correct |
27 |
Correct |
0 ms |
212 KB |
Output is correct |
28 |
Correct |
1 ms |
212 KB |
Output is correct |
29 |
Correct |
0 ms |
212 KB |
Output is correct |
30 |
Correct |
1 ms |
212 KB |
Output is correct |
31 |
Correct |
0 ms |
212 KB |
Output is correct |
32 |
Correct |
1 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 |
0 ms |
296 KB |
Output is correct |
36 |
Correct |
1 ms |
212 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
300 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
300 KB |
Output is correct |
5 |
Correct |
1 ms |
300 KB |
Output is correct |
6 |
Correct |
0 ms |
212 KB |
Output is correct |
7 |
Correct |
0 ms |
300 KB |
Output is correct |
8 |
Correct |
1 ms |
300 KB |
Output is correct |
9 |
Correct |
0 ms |
296 KB |
Output is correct |
10 |
Correct |
1 ms |
300 KB |
Output is correct |
11 |
Correct |
1 ms |
304 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 |
340 KB |
Output is correct |
16 |
Correct |
1 ms |
432 KB |
Output is correct |
17 |
Correct |
1 ms |
688 KB |
Output is correct |
18 |
Correct |
2 ms |
1592 KB |
Output is correct |
19 |
Correct |
1 ms |
1584 KB |
Output is correct |
20 |
Correct |
10 ms |
14136 KB |
Output is correct |
21 |
Correct |
11 ms |
14096 KB |
Output is correct |
22 |
Correct |
106 ms |
138364 KB |
Output is correct |
23 |
Correct |
100 ms |
138336 KB |
Output is correct |
24 |
Correct |
104 ms |
138324 KB |
Output is correct |
25 |
Correct |
102 ms |
138332 KB |
Output is correct |
26 |
Correct |
103 ms |
138316 KB |
Output is correct |
27 |
Correct |
102 ms |
138308 KB |
Output is correct |
28 |
Correct |
99 ms |
138368 KB |
Output is correct |
29 |
Correct |
99 ms |
138276 KB |
Output is correct |
30 |
Correct |
100 ms |
138396 KB |
Output is correct |
31 |
Correct |
105 ms |
138476 KB |
Output is correct |
32 |
Correct |
110 ms |
138400 KB |
Output is correct |
33 |
Correct |
99 ms |
138316 KB |
Output is correct |
34 |
Correct |
100 ms |
138316 KB |
Output is correct |
35 |
Correct |
1 ms |
212 KB |
Output is correct |
36 |
Correct |
1 ms |
256 KB |
Output is correct |
37 |
Correct |
100 ms |
138384 KB |
Output is correct |
38 |
Correct |
101 ms |
138336 KB |
Output is correct |
39 |
Correct |
99 ms |
138292 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
1 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
212 KB |
Output is correct |
5 |
Correct |
131 ms |
137448 KB |
Output is correct |
6 |
Correct |
108 ms |
137556 KB |
Output is correct |
7 |
Correct |
131 ms |
137500 KB |
Output is correct |
8 |
Correct |
109 ms |
138364 KB |
Output is correct |
9 |
Correct |
131 ms |
137512 KB |
Output is correct |
10 |
Correct |
124 ms |
137564 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
300 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
1 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 |
1 ms |
212 KB |
Output is correct |
8 |
Correct |
0 ms |
212 KB |
Output is correct |
9 |
Correct |
1 ms |
224 KB |
Output is correct |
10 |
Correct |
0 ms |
304 KB |
Output is correct |
11 |
Correct |
0 ms |
212 KB |
Output is correct |
12 |
Correct |
0 ms |
212 KB |
Output is correct |
13 |
Correct |
0 ms |
300 KB |
Output is correct |
14 |
Correct |
0 ms |
212 KB |
Output is correct |
15 |
Correct |
0 ms |
212 KB |
Output is correct |
16 |
Correct |
1 ms |
212 KB |
Output is correct |
17 |
Correct |
0 ms |
212 KB |
Output is correct |
18 |
Correct |
0 ms |
212 KB |
Output is correct |
19 |
Correct |
1 ms |
212 KB |
Output is correct |
20 |
Correct |
0 ms |
212 KB |
Output is correct |
21 |
Correct |
0 ms |
296 KB |
Output is correct |
22 |
Correct |
1 ms |
212 KB |
Output is correct |
23 |
Correct |
0 ms |
212 KB |
Output is correct |
24 |
Correct |
1 ms |
212 KB |
Output is correct |
25 |
Correct |
0 ms |
212 KB |
Output is correct |
26 |
Correct |
0 ms |
296 KB |
Output is correct |
27 |
Correct |
0 ms |
212 KB |
Output is correct |
28 |
Correct |
1 ms |
212 KB |
Output is correct |
29 |
Correct |
0 ms |
212 KB |
Output is correct |
30 |
Correct |
1 ms |
212 KB |
Output is correct |
31 |
Correct |
0 ms |
212 KB |
Output is correct |
32 |
Correct |
1 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 |
0 ms |
296 KB |
Output is correct |
36 |
Correct |
1 ms |
212 KB |
Output is correct |
37 |
Correct |
1 ms |
212 KB |
Output is correct |
38 |
Correct |
0 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 |
1 ms |
1620 KB |
Output is correct |
42 |
Correct |
1 ms |
1620 KB |
Output is correct |
43 |
Correct |
1 ms |
1620 KB |
Output is correct |
44 |
Correct |
2 ms |
1620 KB |
Output is correct |
45 |
Correct |
1 ms |
1620 KB |
Output is correct |
46 |
Correct |
3 ms |
1588 KB |
Output is correct |
47 |
Correct |
1 ms |
1620 KB |
Output is correct |
48 |
Correct |
1 ms |
1620 KB |
Output is correct |
49 |
Correct |
1 ms |
1620 KB |
Output is correct |
50 |
Correct |
2 ms |
1620 KB |
Output is correct |
51 |
Correct |
1 ms |
1620 KB |
Output is correct |
52 |
Correct |
1 ms |
1620 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
300 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
1 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 |
1 ms |
212 KB |
Output is correct |
8 |
Correct |
0 ms |
212 KB |
Output is correct |
9 |
Correct |
1 ms |
224 KB |
Output is correct |
10 |
Correct |
0 ms |
304 KB |
Output is correct |
11 |
Correct |
0 ms |
212 KB |
Output is correct |
12 |
Correct |
0 ms |
212 KB |
Output is correct |
13 |
Correct |
0 ms |
300 KB |
Output is correct |
14 |
Correct |
0 ms |
212 KB |
Output is correct |
15 |
Correct |
0 ms |
212 KB |
Output is correct |
16 |
Correct |
1 ms |
212 KB |
Output is correct |
17 |
Correct |
0 ms |
212 KB |
Output is correct |
18 |
Correct |
0 ms |
212 KB |
Output is correct |
19 |
Correct |
1 ms |
212 KB |
Output is correct |
20 |
Correct |
0 ms |
212 KB |
Output is correct |
21 |
Correct |
0 ms |
296 KB |
Output is correct |
22 |
Correct |
1 ms |
212 KB |
Output is correct |
23 |
Correct |
0 ms |
212 KB |
Output is correct |
24 |
Correct |
1 ms |
212 KB |
Output is correct |
25 |
Correct |
0 ms |
212 KB |
Output is correct |
26 |
Correct |
0 ms |
296 KB |
Output is correct |
27 |
Correct |
0 ms |
212 KB |
Output is correct |
28 |
Correct |
1 ms |
212 KB |
Output is correct |
29 |
Correct |
0 ms |
212 KB |
Output is correct |
30 |
Correct |
1 ms |
212 KB |
Output is correct |
31 |
Correct |
0 ms |
212 KB |
Output is correct |
32 |
Correct |
1 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 |
0 ms |
296 KB |
Output is correct |
36 |
Correct |
1 ms |
212 KB |
Output is correct |
37 |
Correct |
0 ms |
212 KB |
Output is correct |
38 |
Correct |
1 ms |
300 KB |
Output is correct |
39 |
Correct |
1 ms |
300 KB |
Output is correct |
40 |
Correct |
0 ms |
212 KB |
Output is correct |
41 |
Correct |
0 ms |
300 KB |
Output is correct |
42 |
Correct |
1 ms |
300 KB |
Output is correct |
43 |
Correct |
0 ms |
296 KB |
Output is correct |
44 |
Correct |
1 ms |
300 KB |
Output is correct |
45 |
Correct |
1 ms |
304 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 |
340 KB |
Output is correct |
50 |
Correct |
1 ms |
432 KB |
Output is correct |
51 |
Correct |
1 ms |
688 KB |
Output is correct |
52 |
Correct |
2 ms |
1592 KB |
Output is correct |
53 |
Correct |
1 ms |
1584 KB |
Output is correct |
54 |
Correct |
10 ms |
14136 KB |
Output is correct |
55 |
Correct |
11 ms |
14096 KB |
Output is correct |
56 |
Correct |
106 ms |
138364 KB |
Output is correct |
57 |
Correct |
100 ms |
138336 KB |
Output is correct |
58 |
Correct |
104 ms |
138324 KB |
Output is correct |
59 |
Correct |
102 ms |
138332 KB |
Output is correct |
60 |
Correct |
103 ms |
138316 KB |
Output is correct |
61 |
Correct |
102 ms |
138308 KB |
Output is correct |
62 |
Correct |
99 ms |
138368 KB |
Output is correct |
63 |
Correct |
99 ms |
138276 KB |
Output is correct |
64 |
Correct |
100 ms |
138396 KB |
Output is correct |
65 |
Correct |
105 ms |
138476 KB |
Output is correct |
66 |
Correct |
110 ms |
138400 KB |
Output is correct |
67 |
Correct |
99 ms |
138316 KB |
Output is correct |
68 |
Correct |
100 ms |
138316 KB |
Output is correct |
69 |
Correct |
1 ms |
212 KB |
Output is correct |
70 |
Correct |
1 ms |
256 KB |
Output is correct |
71 |
Correct |
100 ms |
138384 KB |
Output is correct |
72 |
Correct |
101 ms |
138336 KB |
Output is correct |
73 |
Correct |
99 ms |
138292 KB |
Output is correct |
74 |
Correct |
0 ms |
212 KB |
Output is correct |
75 |
Correct |
1 ms |
212 KB |
Output is correct |
76 |
Correct |
1 ms |
212 KB |
Output is correct |
77 |
Correct |
1 ms |
212 KB |
Output is correct |
78 |
Correct |
131 ms |
137448 KB |
Output is correct |
79 |
Correct |
108 ms |
137556 KB |
Output is correct |
80 |
Correct |
131 ms |
137500 KB |
Output is correct |
81 |
Correct |
109 ms |
138364 KB |
Output is correct |
82 |
Correct |
131 ms |
137512 KB |
Output is correct |
83 |
Correct |
124 ms |
137564 KB |
Output is correct |
84 |
Correct |
1 ms |
212 KB |
Output is correct |
85 |
Correct |
0 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 |
1 ms |
1620 KB |
Output is correct |
89 |
Correct |
1 ms |
1620 KB |
Output is correct |
90 |
Correct |
1 ms |
1620 KB |
Output is correct |
91 |
Correct |
2 ms |
1620 KB |
Output is correct |
92 |
Correct |
1 ms |
1620 KB |
Output is correct |
93 |
Correct |
3 ms |
1588 KB |
Output is correct |
94 |
Correct |
1 ms |
1620 KB |
Output is correct |
95 |
Correct |
1 ms |
1620 KB |
Output is correct |
96 |
Correct |
1 ms |
1620 KB |
Output is correct |
97 |
Correct |
2 ms |
1620 KB |
Output is correct |
98 |
Correct |
1 ms |
1620 KB |
Output is correct |
99 |
Correct |
1 ms |
1620 KB |
Output is correct |
100 |
Correct |
1 ms |
1588 KB |
Output is correct |
101 |
Correct |
12 ms |
14104 KB |
Output is correct |
102 |
Correct |
13 ms |
14096 KB |
Output is correct |
103 |
Correct |
141 ms |
138540 KB |
Output is correct |
104 |
Correct |
142 ms |
138544 KB |
Output is correct |
105 |
Correct |
137 ms |
138560 KB |
Output is correct |
106 |
Correct |
142 ms |
138552 KB |
Output is correct |
107 |
Correct |
122 ms |
138468 KB |
Output is correct |
108 |
Correct |
124 ms |
138528 KB |
Output is correct |
109 |
Correct |
100 ms |
139340 KB |
Output is correct |
110 |
Correct |
99 ms |
139308 KB |
Output is correct |
111 |
Correct |
131 ms |
138548 KB |
Output is correct |
112 |
Correct |
142 ms |
138592 KB |
Output is correct |
113 |
Correct |
109 ms |
138480 KB |
Output is correct |
114 |
Correct |
130 ms |
138536 KB |
Output is correct |
115 |
Correct |
134 ms |
138544 KB |
Output is correct |