import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.nio.Buffer;
import java.util.ArrayDeque;
import java.util.Comparator;
import java.util.PriorityQueue;
import java.util.StringTokenizer;
public class shoes {
long count_swaps(int[] S) {
int N = S.length/2;
ArrayDeque<Integer>[] left = new ArrayDeque[N];
ArrayDeque<Integer>[] right = new ArrayDeque[N];
for (int i = 0; i < N; i++) {
left[i] = new ArrayDeque<>();
right[i] = new ArrayDeque<>();
}
FenwickTree unset = new FenwickTree(2 * N);
for (int i = 0; i < 2 * N; i++) {
int a = S[i];
if (a < 0) {
left[(-a) - 1].add(i);
} else {
right[a - 1].add(i);
}
unset.add(i, 1);
}
long res = 0;
PriorityQueue<int[]> next = new PriorityQueue<>(new Comparator<int[]>() {
public int compare(int[] ints, int[] t1) {
return Integer.compare(ints[0] + ints[1] + (ints[0] > ints[1] ? 1 : 0), t1[0] + t1[1] + (t1[0] > t1[1] ? 1 : 0));
}
});
for (int i = 0; i < N; i++) {
if (left[i].size() > 0) {
next.add(new int[]{left[i].remove(), right[i].remove(), i});
}
}
for (int i = 0; i < N; i++) {
int[] a = next.remove();
res += (unset.sum(a[0]) - 1);
unset.add(a[0], -1);
res += (unset.sum(a[1]) - 1);
unset.add(a[1], -1);
if (left[a[2]].size() > 0) {
next.add(new int[]{left[a[2]].remove(), right[a[2]].remove(), a[2]});
}
}
return res;
}
static class FenwickTree {
public int[] BIT;
public int size = 0;
public FenwickTree(int N) {
BIT = new int[N];
size = N;
}
public FenwickTree(int[] arr) {
size = arr.length;
BIT = new int[arr.length];
for (int i = 0; i < size; i++) {
add(i, arr[i]);
}
}
public void add(int id, int add) {
for (int i = id; i < size; i |= i + 1) {
BIT[i] += add;
}
}
public int sum(int r) {
if (r < 0 || r >= size) {
return 0;
}
int res = 0;
for (int i = r; i >= 0; i = ((i) & (i + 1)) - 1) {
res += BIT[i];
}
return res;
}
}
}
Compilation message
Note: shoes.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
88 ms |
9568 KB |
Output is correct |
2 |
Correct |
85 ms |
9584 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
88 ms |
9568 KB |
Output is correct |
2 |
Correct |
85 ms |
9584 KB |
Output is correct |
3 |
Correct |
87 ms |
9624 KB |
Output is correct |
4 |
Correct |
85 ms |
9728 KB |
Output is correct |
5 |
Correct |
86 ms |
9544 KB |
Output is correct |
6 |
Correct |
84 ms |
9624 KB |
Output is correct |
7 |
Correct |
84 ms |
9628 KB |
Output is correct |
8 |
Correct |
85 ms |
9680 KB |
Output is correct |
9 |
Correct |
87 ms |
9720 KB |
Output is correct |
10 |
Correct |
85 ms |
9736 KB |
Output is correct |
11 |
Correct |
83 ms |
9724 KB |
Output is correct |
12 |
Correct |
84 ms |
9724 KB |
Output is correct |
13 |
Correct |
85 ms |
9676 KB |
Output is correct |
14 |
Correct |
84 ms |
9580 KB |
Output is correct |
15 |
Correct |
86 ms |
9704 KB |
Output is correct |
16 |
Correct |
86 ms |
9440 KB |
Output is correct |
17 |
Correct |
86 ms |
9752 KB |
Output is correct |
18 |
Correct |
86 ms |
9748 KB |
Output is correct |
19 |
Correct |
87 ms |
9584 KB |
Output is correct |
20 |
Correct |
84 ms |
9784 KB |
Output is correct |
21 |
Correct |
86 ms |
9480 KB |
Output is correct |
22 |
Correct |
85 ms |
9704 KB |
Output is correct |
23 |
Correct |
86 ms |
9624 KB |
Output is correct |
24 |
Correct |
87 ms |
9728 KB |
Output is correct |
25 |
Correct |
85 ms |
9624 KB |
Output is correct |
26 |
Correct |
86 ms |
9720 KB |
Output is correct |
27 |
Correct |
84 ms |
9648 KB |
Output is correct |
28 |
Correct |
85 ms |
9724 KB |
Output is correct |
29 |
Correct |
85 ms |
9544 KB |
Output is correct |
30 |
Correct |
86 ms |
9732 KB |
Output is correct |
31 |
Correct |
91 ms |
9500 KB |
Output is correct |
32 |
Correct |
95 ms |
9752 KB |
Output is correct |
33 |
Correct |
90 ms |
9660 KB |
Output is correct |
34 |
Correct |
93 ms |
9348 KB |
Output is correct |
35 |
Correct |
89 ms |
9564 KB |
Output is correct |
36 |
Correct |
93 ms |
9556 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
88 ms |
9568 KB |
Output is correct |
2 |
Correct |
85 ms |
9584 KB |
Output is correct |
3 |
Correct |
90 ms |
9592 KB |
Output is correct |
4 |
Correct |
95 ms |
9608 KB |
Output is correct |
5 |
Correct |
86 ms |
9652 KB |
Output is correct |
6 |
Correct |
96 ms |
9620 KB |
Output is correct |
7 |
Correct |
93 ms |
9720 KB |
Output is correct |
8 |
Correct |
95 ms |
9560 KB |
Output is correct |
9 |
Correct |
93 ms |
9712 KB |
Output is correct |
10 |
Correct |
85 ms |
9620 KB |
Output is correct |
11 |
Correct |
85 ms |
9692 KB |
Output is correct |
12 |
Correct |
86 ms |
9636 KB |
Output is correct |
13 |
Correct |
93 ms |
9656 KB |
Output is correct |
14 |
Correct |
91 ms |
9636 KB |
Output is correct |
15 |
Correct |
85 ms |
9596 KB |
Output is correct |
16 |
Correct |
95 ms |
9892 KB |
Output is correct |
17 |
Correct |
92 ms |
9832 KB |
Output is correct |
18 |
Correct |
99 ms |
10268 KB |
Output is correct |
19 |
Correct |
102 ms |
10136 KB |
Output is correct |
20 |
Correct |
140 ms |
13956 KB |
Output is correct |
21 |
Correct |
141 ms |
14088 KB |
Output is correct |
22 |
Correct |
278 ms |
44232 KB |
Output is correct |
23 |
Correct |
274 ms |
43976 KB |
Output is correct |
24 |
Correct |
286 ms |
43688 KB |
Output is correct |
25 |
Correct |
285 ms |
44088 KB |
Output is correct |
26 |
Correct |
303 ms |
43584 KB |
Output is correct |
27 |
Correct |
271 ms |
43564 KB |
Output is correct |
28 |
Correct |
278 ms |
44712 KB |
Output is correct |
29 |
Correct |
290 ms |
44576 KB |
Output is correct |
30 |
Correct |
285 ms |
44536 KB |
Output is correct |
31 |
Correct |
279 ms |
43932 KB |
Output is correct |
32 |
Correct |
284 ms |
44068 KB |
Output is correct |
33 |
Correct |
300 ms |
44148 KB |
Output is correct |
34 |
Correct |
282 ms |
44588 KB |
Output is correct |
35 |
Correct |
84 ms |
9608 KB |
Output is correct |
36 |
Correct |
83 ms |
9640 KB |
Output is correct |
37 |
Correct |
290 ms |
44724 KB |
Output is correct |
38 |
Correct |
280 ms |
44360 KB |
Output is correct |
39 |
Correct |
285 ms |
44784 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
86 ms |
9644 KB |
Output is correct |
2 |
Correct |
85 ms |
9700 KB |
Output is correct |
3 |
Correct |
85 ms |
9644 KB |
Output is correct |
4 |
Correct |
86 ms |
9676 KB |
Output is correct |
5 |
Correct |
474 ms |
44708 KB |
Output is correct |
6 |
Correct |
443 ms |
45116 KB |
Output is correct |
7 |
Correct |
470 ms |
44740 KB |
Output is correct |
8 |
Correct |
327 ms |
45784 KB |
Output is correct |
9 |
Correct |
468 ms |
44788 KB |
Output is correct |
10 |
Correct |
475 ms |
43740 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
88 ms |
9568 KB |
Output is correct |
2 |
Correct |
85 ms |
9584 KB |
Output is correct |
3 |
Correct |
87 ms |
9624 KB |
Output is correct |
4 |
Correct |
85 ms |
9728 KB |
Output is correct |
5 |
Correct |
86 ms |
9544 KB |
Output is correct |
6 |
Correct |
84 ms |
9624 KB |
Output is correct |
7 |
Correct |
84 ms |
9628 KB |
Output is correct |
8 |
Correct |
85 ms |
9680 KB |
Output is correct |
9 |
Correct |
87 ms |
9720 KB |
Output is correct |
10 |
Correct |
85 ms |
9736 KB |
Output is correct |
11 |
Correct |
83 ms |
9724 KB |
Output is correct |
12 |
Correct |
84 ms |
9724 KB |
Output is correct |
13 |
Correct |
85 ms |
9676 KB |
Output is correct |
14 |
Correct |
84 ms |
9580 KB |
Output is correct |
15 |
Correct |
86 ms |
9704 KB |
Output is correct |
16 |
Correct |
86 ms |
9440 KB |
Output is correct |
17 |
Correct |
86 ms |
9752 KB |
Output is correct |
18 |
Correct |
86 ms |
9748 KB |
Output is correct |
19 |
Correct |
87 ms |
9584 KB |
Output is correct |
20 |
Correct |
84 ms |
9784 KB |
Output is correct |
21 |
Correct |
86 ms |
9480 KB |
Output is correct |
22 |
Correct |
85 ms |
9704 KB |
Output is correct |
23 |
Correct |
86 ms |
9624 KB |
Output is correct |
24 |
Correct |
87 ms |
9728 KB |
Output is correct |
25 |
Correct |
85 ms |
9624 KB |
Output is correct |
26 |
Correct |
86 ms |
9720 KB |
Output is correct |
27 |
Correct |
84 ms |
9648 KB |
Output is correct |
28 |
Correct |
85 ms |
9724 KB |
Output is correct |
29 |
Correct |
85 ms |
9544 KB |
Output is correct |
30 |
Correct |
86 ms |
9732 KB |
Output is correct |
31 |
Correct |
91 ms |
9500 KB |
Output is correct |
32 |
Correct |
95 ms |
9752 KB |
Output is correct |
33 |
Correct |
90 ms |
9660 KB |
Output is correct |
34 |
Correct |
93 ms |
9348 KB |
Output is correct |
35 |
Correct |
89 ms |
9564 KB |
Output is correct |
36 |
Correct |
93 ms |
9556 KB |
Output is correct |
37 |
Correct |
84 ms |
9648 KB |
Output is correct |
38 |
Correct |
86 ms |
9692 KB |
Output is correct |
39 |
Correct |
87 ms |
9680 KB |
Output is correct |
40 |
Correct |
93 ms |
9860 KB |
Output is correct |
41 |
Correct |
104 ms |
10292 KB |
Output is correct |
42 |
Correct |
107 ms |
10508 KB |
Output is correct |
43 |
Correct |
108 ms |
10244 KB |
Output is correct |
44 |
Correct |
108 ms |
10628 KB |
Output is correct |
45 |
Correct |
111 ms |
10412 KB |
Output is correct |
46 |
Correct |
111 ms |
10400 KB |
Output is correct |
47 |
Correct |
105 ms |
10420 KB |
Output is correct |
48 |
Correct |
107 ms |
10204 KB |
Output is correct |
49 |
Correct |
116 ms |
10396 KB |
Output is correct |
50 |
Correct |
107 ms |
10432 KB |
Output is correct |
51 |
Correct |
109 ms |
10104 KB |
Output is correct |
52 |
Correct |
114 ms |
10376 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
88 ms |
9568 KB |
Output is correct |
2 |
Correct |
85 ms |
9584 KB |
Output is correct |
3 |
Correct |
87 ms |
9624 KB |
Output is correct |
4 |
Correct |
85 ms |
9728 KB |
Output is correct |
5 |
Correct |
86 ms |
9544 KB |
Output is correct |
6 |
Correct |
84 ms |
9624 KB |
Output is correct |
7 |
Correct |
84 ms |
9628 KB |
Output is correct |
8 |
Correct |
85 ms |
9680 KB |
Output is correct |
9 |
Correct |
87 ms |
9720 KB |
Output is correct |
10 |
Correct |
85 ms |
9736 KB |
Output is correct |
11 |
Correct |
83 ms |
9724 KB |
Output is correct |
12 |
Correct |
84 ms |
9724 KB |
Output is correct |
13 |
Correct |
85 ms |
9676 KB |
Output is correct |
14 |
Correct |
84 ms |
9580 KB |
Output is correct |
15 |
Correct |
86 ms |
9704 KB |
Output is correct |
16 |
Correct |
86 ms |
9440 KB |
Output is correct |
17 |
Correct |
86 ms |
9752 KB |
Output is correct |
18 |
Correct |
86 ms |
9748 KB |
Output is correct |
19 |
Correct |
87 ms |
9584 KB |
Output is correct |
20 |
Correct |
84 ms |
9784 KB |
Output is correct |
21 |
Correct |
86 ms |
9480 KB |
Output is correct |
22 |
Correct |
85 ms |
9704 KB |
Output is correct |
23 |
Correct |
86 ms |
9624 KB |
Output is correct |
24 |
Correct |
87 ms |
9728 KB |
Output is correct |
25 |
Correct |
85 ms |
9624 KB |
Output is correct |
26 |
Correct |
86 ms |
9720 KB |
Output is correct |
27 |
Correct |
84 ms |
9648 KB |
Output is correct |
28 |
Correct |
85 ms |
9724 KB |
Output is correct |
29 |
Correct |
85 ms |
9544 KB |
Output is correct |
30 |
Correct |
86 ms |
9732 KB |
Output is correct |
31 |
Correct |
91 ms |
9500 KB |
Output is correct |
32 |
Correct |
95 ms |
9752 KB |
Output is correct |
33 |
Correct |
90 ms |
9660 KB |
Output is correct |
34 |
Correct |
93 ms |
9348 KB |
Output is correct |
35 |
Correct |
89 ms |
9564 KB |
Output is correct |
36 |
Correct |
93 ms |
9556 KB |
Output is correct |
37 |
Correct |
90 ms |
9592 KB |
Output is correct |
38 |
Correct |
95 ms |
9608 KB |
Output is correct |
39 |
Correct |
86 ms |
9652 KB |
Output is correct |
40 |
Correct |
96 ms |
9620 KB |
Output is correct |
41 |
Correct |
93 ms |
9720 KB |
Output is correct |
42 |
Correct |
95 ms |
9560 KB |
Output is correct |
43 |
Correct |
93 ms |
9712 KB |
Output is correct |
44 |
Correct |
85 ms |
9620 KB |
Output is correct |
45 |
Correct |
85 ms |
9692 KB |
Output is correct |
46 |
Correct |
86 ms |
9636 KB |
Output is correct |
47 |
Correct |
93 ms |
9656 KB |
Output is correct |
48 |
Correct |
91 ms |
9636 KB |
Output is correct |
49 |
Correct |
85 ms |
9596 KB |
Output is correct |
50 |
Correct |
95 ms |
9892 KB |
Output is correct |
51 |
Correct |
92 ms |
9832 KB |
Output is correct |
52 |
Correct |
99 ms |
10268 KB |
Output is correct |
53 |
Correct |
102 ms |
10136 KB |
Output is correct |
54 |
Correct |
140 ms |
13956 KB |
Output is correct |
55 |
Correct |
141 ms |
14088 KB |
Output is correct |
56 |
Correct |
278 ms |
44232 KB |
Output is correct |
57 |
Correct |
274 ms |
43976 KB |
Output is correct |
58 |
Correct |
286 ms |
43688 KB |
Output is correct |
59 |
Correct |
285 ms |
44088 KB |
Output is correct |
60 |
Correct |
303 ms |
43584 KB |
Output is correct |
61 |
Correct |
271 ms |
43564 KB |
Output is correct |
62 |
Correct |
278 ms |
44712 KB |
Output is correct |
63 |
Correct |
290 ms |
44576 KB |
Output is correct |
64 |
Correct |
285 ms |
44536 KB |
Output is correct |
65 |
Correct |
279 ms |
43932 KB |
Output is correct |
66 |
Correct |
284 ms |
44068 KB |
Output is correct |
67 |
Correct |
300 ms |
44148 KB |
Output is correct |
68 |
Correct |
282 ms |
44588 KB |
Output is correct |
69 |
Correct |
84 ms |
9608 KB |
Output is correct |
70 |
Correct |
83 ms |
9640 KB |
Output is correct |
71 |
Correct |
290 ms |
44724 KB |
Output is correct |
72 |
Correct |
280 ms |
44360 KB |
Output is correct |
73 |
Correct |
285 ms |
44784 KB |
Output is correct |
74 |
Correct |
86 ms |
9644 KB |
Output is correct |
75 |
Correct |
85 ms |
9700 KB |
Output is correct |
76 |
Correct |
85 ms |
9644 KB |
Output is correct |
77 |
Correct |
86 ms |
9676 KB |
Output is correct |
78 |
Correct |
474 ms |
44708 KB |
Output is correct |
79 |
Correct |
443 ms |
45116 KB |
Output is correct |
80 |
Correct |
470 ms |
44740 KB |
Output is correct |
81 |
Correct |
327 ms |
45784 KB |
Output is correct |
82 |
Correct |
468 ms |
44788 KB |
Output is correct |
83 |
Correct |
475 ms |
43740 KB |
Output is correct |
84 |
Correct |
84 ms |
9648 KB |
Output is correct |
85 |
Correct |
86 ms |
9692 KB |
Output is correct |
86 |
Correct |
87 ms |
9680 KB |
Output is correct |
87 |
Correct |
93 ms |
9860 KB |
Output is correct |
88 |
Correct |
104 ms |
10292 KB |
Output is correct |
89 |
Correct |
107 ms |
10508 KB |
Output is correct |
90 |
Correct |
108 ms |
10244 KB |
Output is correct |
91 |
Correct |
108 ms |
10628 KB |
Output is correct |
92 |
Correct |
111 ms |
10412 KB |
Output is correct |
93 |
Correct |
111 ms |
10400 KB |
Output is correct |
94 |
Correct |
105 ms |
10420 KB |
Output is correct |
95 |
Correct |
107 ms |
10204 KB |
Output is correct |
96 |
Correct |
116 ms |
10396 KB |
Output is correct |
97 |
Correct |
107 ms |
10432 KB |
Output is correct |
98 |
Correct |
109 ms |
10104 KB |
Output is correct |
99 |
Correct |
114 ms |
10376 KB |
Output is correct |
100 |
Correct |
115 ms |
10540 KB |
Output is correct |
101 |
Correct |
198 ms |
14796 KB |
Output is correct |
102 |
Correct |
185 ms |
14324 KB |
Output is correct |
103 |
Correct |
535 ms |
45100 KB |
Output is correct |
104 |
Correct |
437 ms |
44588 KB |
Output is correct |
105 |
Correct |
463 ms |
43448 KB |
Output is correct |
106 |
Correct |
497 ms |
45428 KB |
Output is correct |
107 |
Correct |
416 ms |
43552 KB |
Output is correct |
108 |
Correct |
506 ms |
44528 KB |
Output is correct |
109 |
Correct |
321 ms |
45872 KB |
Output is correct |
110 |
Correct |
285 ms |
44688 KB |
Output is correct |
111 |
Correct |
485 ms |
44604 KB |
Output is correct |
112 |
Correct |
440 ms |
44212 KB |
Output is correct |
113 |
Correct |
450 ms |
45588 KB |
Output is correct |
114 |
Correct |
355 ms |
44496 KB |
Output is correct |
115 |
Correct |
362 ms |
44548 KB |
Output is correct |