import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Arrays;
public class shoes {
private int[] tree;
private void add(int from, int to, int a, int b, int node) {
if (from <= a && b <= to) {
tree[node]++;
return;
}
int mid = (a + b) / 2;
if (from <= mid) {
add(from, to, a, mid, node * 2);
}
if (to > mid) {
add(from, to, mid + 1, b, node * 2 + 1);
}
}
private int getSum(int i, int a, int b, int node) {
if (a == b) {
return tree[node];
}
int mid = (a + b) / 2;
if (i <= mid) return getSum(i, a, mid, node * 2) + tree[node];
return getSum(i, mid + 1, b, node * 2 + 1) + tree[node];
}
public long count_swaps(int[] s) {
int n = s.length;
ArrayDeque<Integer>[] shoes = new ArrayDeque[2 * n + 1];
for (int i = 0; i <= 2 * n; i++) shoes[i] = new ArrayDeque<Integer>();
for (int i = 0; i < n; i++) {
shoes[s[i] + n].addLast(i);
}
tree = new int[4 * n];
long swaps = 0;
for (int i = 0; i < n; i++) {
if (shoes[n + s[i]].isEmpty() || shoes[n + s[i]].peekFirst() != i) continue;
//System.out.println(i);
int index1 = getSum(i, 0, n - 1, 1) + i;
shoes[n + s[i]].removeFirst();
int orgIndex2 = shoes[n - s[i]].removeFirst();
int index2 = getSum(orgIndex2, 0, n - 1, 1) + orgIndex2;
swaps += index2 - index1;
if (s[i] < 0) swaps--;
add(0, orgIndex2, 0, n - 1, 1);
}
return swaps;
}
}
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 |
81 ms |
10316 KB |
Output is correct |
2 |
Correct |
80 ms |
10020 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
81 ms |
10316 KB |
Output is correct |
2 |
Correct |
80 ms |
10020 KB |
Output is correct |
3 |
Correct |
88 ms |
10092 KB |
Output is correct |
4 |
Correct |
84 ms |
10080 KB |
Output is correct |
5 |
Correct |
80 ms |
10200 KB |
Output is correct |
6 |
Correct |
91 ms |
9948 KB |
Output is correct |
7 |
Correct |
84 ms |
9976 KB |
Output is correct |
8 |
Correct |
78 ms |
10228 KB |
Output is correct |
9 |
Correct |
85 ms |
10040 KB |
Output is correct |
10 |
Correct |
84 ms |
10036 KB |
Output is correct |
11 |
Correct |
90 ms |
10036 KB |
Output is correct |
12 |
Correct |
100 ms |
10200 KB |
Output is correct |
13 |
Correct |
81 ms |
10092 KB |
Output is correct |
14 |
Correct |
94 ms |
10232 KB |
Output is correct |
15 |
Correct |
101 ms |
10192 KB |
Output is correct |
16 |
Correct |
90 ms |
9996 KB |
Output is correct |
17 |
Correct |
82 ms |
10192 KB |
Output is correct |
18 |
Correct |
82 ms |
10084 KB |
Output is correct |
19 |
Correct |
83 ms |
10104 KB |
Output is correct |
20 |
Correct |
82 ms |
10344 KB |
Output is correct |
21 |
Correct |
104 ms |
10172 KB |
Output is correct |
22 |
Correct |
78 ms |
10232 KB |
Output is correct |
23 |
Correct |
82 ms |
10216 KB |
Output is correct |
24 |
Correct |
76 ms |
10232 KB |
Output is correct |
25 |
Correct |
75 ms |
10104 KB |
Output is correct |
26 |
Correct |
78 ms |
10124 KB |
Output is correct |
27 |
Correct |
75 ms |
10088 KB |
Output is correct |
28 |
Correct |
77 ms |
9976 KB |
Output is correct |
29 |
Correct |
74 ms |
10092 KB |
Output is correct |
30 |
Correct |
74 ms |
10020 KB |
Output is correct |
31 |
Correct |
79 ms |
10232 KB |
Output is correct |
32 |
Correct |
74 ms |
10100 KB |
Output is correct |
33 |
Correct |
83 ms |
10356 KB |
Output is correct |
34 |
Correct |
84 ms |
10032 KB |
Output is correct |
35 |
Correct |
82 ms |
10192 KB |
Output is correct |
36 |
Correct |
78 ms |
10088 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
81 ms |
10316 KB |
Output is correct |
2 |
Correct |
80 ms |
10020 KB |
Output is correct |
3 |
Correct |
78 ms |
10264 KB |
Output is correct |
4 |
Correct |
75 ms |
10088 KB |
Output is correct |
5 |
Correct |
96 ms |
10132 KB |
Output is correct |
6 |
Correct |
78 ms |
10008 KB |
Output is correct |
7 |
Correct |
77 ms |
10216 KB |
Output is correct |
8 |
Correct |
84 ms |
10232 KB |
Output is correct |
9 |
Correct |
77 ms |
10188 KB |
Output is correct |
10 |
Correct |
74 ms |
10232 KB |
Output is correct |
11 |
Correct |
77 ms |
10104 KB |
Output is correct |
12 |
Correct |
77 ms |
10104 KB |
Output is correct |
13 |
Correct |
83 ms |
10216 KB |
Output is correct |
14 |
Correct |
87 ms |
10220 KB |
Output is correct |
15 |
Correct |
78 ms |
10148 KB |
Output is correct |
16 |
Correct |
83 ms |
10104 KB |
Output is correct |
17 |
Correct |
83 ms |
10488 KB |
Output is correct |
18 |
Correct |
97 ms |
11248 KB |
Output is correct |
19 |
Correct |
92 ms |
10856 KB |
Output is correct |
20 |
Correct |
143 ms |
17396 KB |
Output is correct |
21 |
Correct |
137 ms |
16500 KB |
Output is correct |
22 |
Correct |
431 ms |
79796 KB |
Output is correct |
23 |
Correct |
464 ms |
79920 KB |
Output is correct |
24 |
Correct |
512 ms |
80176 KB |
Output is correct |
25 |
Correct |
539 ms |
80324 KB |
Output is correct |
26 |
Correct |
452 ms |
80104 KB |
Output is correct |
27 |
Correct |
458 ms |
80032 KB |
Output is correct |
28 |
Correct |
451 ms |
80648 KB |
Output is correct |
29 |
Correct |
447 ms |
80876 KB |
Output is correct |
30 |
Correct |
459 ms |
81188 KB |
Output is correct |
31 |
Correct |
437 ms |
80052 KB |
Output is correct |
32 |
Correct |
513 ms |
80980 KB |
Output is correct |
33 |
Correct |
499 ms |
80956 KB |
Output is correct |
34 |
Correct |
479 ms |
81324 KB |
Output is correct |
35 |
Correct |
80 ms |
10088 KB |
Output is correct |
36 |
Correct |
80 ms |
10100 KB |
Output is correct |
37 |
Correct |
429 ms |
81004 KB |
Output is correct |
38 |
Correct |
438 ms |
81436 KB |
Output is correct |
39 |
Correct |
502 ms |
81008 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
76 ms |
10088 KB |
Output is correct |
2 |
Correct |
77 ms |
10276 KB |
Output is correct |
3 |
Correct |
78 ms |
10232 KB |
Output is correct |
4 |
Correct |
75 ms |
10088 KB |
Output is correct |
5 |
Correct |
508 ms |
80804 KB |
Output is correct |
6 |
Correct |
454 ms |
80616 KB |
Output is correct |
7 |
Correct |
531 ms |
81436 KB |
Output is correct |
8 |
Correct |
479 ms |
81136 KB |
Output is correct |
9 |
Correct |
523 ms |
81392 KB |
Output is correct |
10 |
Correct |
533 ms |
80920 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
81 ms |
10316 KB |
Output is correct |
2 |
Correct |
80 ms |
10020 KB |
Output is correct |
3 |
Correct |
88 ms |
10092 KB |
Output is correct |
4 |
Correct |
84 ms |
10080 KB |
Output is correct |
5 |
Correct |
80 ms |
10200 KB |
Output is correct |
6 |
Correct |
91 ms |
9948 KB |
Output is correct |
7 |
Correct |
84 ms |
9976 KB |
Output is correct |
8 |
Correct |
78 ms |
10228 KB |
Output is correct |
9 |
Correct |
85 ms |
10040 KB |
Output is correct |
10 |
Correct |
84 ms |
10036 KB |
Output is correct |
11 |
Correct |
90 ms |
10036 KB |
Output is correct |
12 |
Correct |
100 ms |
10200 KB |
Output is correct |
13 |
Correct |
81 ms |
10092 KB |
Output is correct |
14 |
Correct |
94 ms |
10232 KB |
Output is correct |
15 |
Correct |
101 ms |
10192 KB |
Output is correct |
16 |
Correct |
90 ms |
9996 KB |
Output is correct |
17 |
Correct |
82 ms |
10192 KB |
Output is correct |
18 |
Correct |
82 ms |
10084 KB |
Output is correct |
19 |
Correct |
83 ms |
10104 KB |
Output is correct |
20 |
Correct |
82 ms |
10344 KB |
Output is correct |
21 |
Correct |
104 ms |
10172 KB |
Output is correct |
22 |
Correct |
78 ms |
10232 KB |
Output is correct |
23 |
Correct |
82 ms |
10216 KB |
Output is correct |
24 |
Correct |
76 ms |
10232 KB |
Output is correct |
25 |
Correct |
75 ms |
10104 KB |
Output is correct |
26 |
Correct |
78 ms |
10124 KB |
Output is correct |
27 |
Correct |
75 ms |
10088 KB |
Output is correct |
28 |
Correct |
77 ms |
9976 KB |
Output is correct |
29 |
Correct |
74 ms |
10092 KB |
Output is correct |
30 |
Correct |
74 ms |
10020 KB |
Output is correct |
31 |
Correct |
79 ms |
10232 KB |
Output is correct |
32 |
Correct |
74 ms |
10100 KB |
Output is correct |
33 |
Correct |
83 ms |
10356 KB |
Output is correct |
34 |
Correct |
84 ms |
10032 KB |
Output is correct |
35 |
Correct |
82 ms |
10192 KB |
Output is correct |
36 |
Correct |
78 ms |
10088 KB |
Output is correct |
37 |
Correct |
81 ms |
10092 KB |
Output is correct |
38 |
Correct |
90 ms |
10088 KB |
Output is correct |
39 |
Correct |
80 ms |
10304 KB |
Output is correct |
40 |
Correct |
88 ms |
10664 KB |
Output is correct |
41 |
Correct |
98 ms |
11264 KB |
Output is correct |
42 |
Correct |
98 ms |
11548 KB |
Output is correct |
43 |
Correct |
94 ms |
10980 KB |
Output is correct |
44 |
Correct |
102 ms |
11356 KB |
Output is correct |
45 |
Correct |
105 ms |
10848 KB |
Output is correct |
46 |
Correct |
106 ms |
11388 KB |
Output is correct |
47 |
Correct |
97 ms |
10852 KB |
Output is correct |
48 |
Correct |
104 ms |
11596 KB |
Output is correct |
49 |
Correct |
101 ms |
11368 KB |
Output is correct |
50 |
Correct |
99 ms |
11368 KB |
Output is correct |
51 |
Correct |
94 ms |
10872 KB |
Output is correct |
52 |
Correct |
102 ms |
11412 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
81 ms |
10316 KB |
Output is correct |
2 |
Correct |
80 ms |
10020 KB |
Output is correct |
3 |
Correct |
88 ms |
10092 KB |
Output is correct |
4 |
Correct |
84 ms |
10080 KB |
Output is correct |
5 |
Correct |
80 ms |
10200 KB |
Output is correct |
6 |
Correct |
91 ms |
9948 KB |
Output is correct |
7 |
Correct |
84 ms |
9976 KB |
Output is correct |
8 |
Correct |
78 ms |
10228 KB |
Output is correct |
9 |
Correct |
85 ms |
10040 KB |
Output is correct |
10 |
Correct |
84 ms |
10036 KB |
Output is correct |
11 |
Correct |
90 ms |
10036 KB |
Output is correct |
12 |
Correct |
100 ms |
10200 KB |
Output is correct |
13 |
Correct |
81 ms |
10092 KB |
Output is correct |
14 |
Correct |
94 ms |
10232 KB |
Output is correct |
15 |
Correct |
101 ms |
10192 KB |
Output is correct |
16 |
Correct |
90 ms |
9996 KB |
Output is correct |
17 |
Correct |
82 ms |
10192 KB |
Output is correct |
18 |
Correct |
82 ms |
10084 KB |
Output is correct |
19 |
Correct |
83 ms |
10104 KB |
Output is correct |
20 |
Correct |
82 ms |
10344 KB |
Output is correct |
21 |
Correct |
104 ms |
10172 KB |
Output is correct |
22 |
Correct |
78 ms |
10232 KB |
Output is correct |
23 |
Correct |
82 ms |
10216 KB |
Output is correct |
24 |
Correct |
76 ms |
10232 KB |
Output is correct |
25 |
Correct |
75 ms |
10104 KB |
Output is correct |
26 |
Correct |
78 ms |
10124 KB |
Output is correct |
27 |
Correct |
75 ms |
10088 KB |
Output is correct |
28 |
Correct |
77 ms |
9976 KB |
Output is correct |
29 |
Correct |
74 ms |
10092 KB |
Output is correct |
30 |
Correct |
74 ms |
10020 KB |
Output is correct |
31 |
Correct |
79 ms |
10232 KB |
Output is correct |
32 |
Correct |
74 ms |
10100 KB |
Output is correct |
33 |
Correct |
83 ms |
10356 KB |
Output is correct |
34 |
Correct |
84 ms |
10032 KB |
Output is correct |
35 |
Correct |
82 ms |
10192 KB |
Output is correct |
36 |
Correct |
78 ms |
10088 KB |
Output is correct |
37 |
Correct |
78 ms |
10264 KB |
Output is correct |
38 |
Correct |
75 ms |
10088 KB |
Output is correct |
39 |
Correct |
96 ms |
10132 KB |
Output is correct |
40 |
Correct |
78 ms |
10008 KB |
Output is correct |
41 |
Correct |
77 ms |
10216 KB |
Output is correct |
42 |
Correct |
84 ms |
10232 KB |
Output is correct |
43 |
Correct |
77 ms |
10188 KB |
Output is correct |
44 |
Correct |
74 ms |
10232 KB |
Output is correct |
45 |
Correct |
77 ms |
10104 KB |
Output is correct |
46 |
Correct |
77 ms |
10104 KB |
Output is correct |
47 |
Correct |
83 ms |
10216 KB |
Output is correct |
48 |
Correct |
87 ms |
10220 KB |
Output is correct |
49 |
Correct |
78 ms |
10148 KB |
Output is correct |
50 |
Correct |
83 ms |
10104 KB |
Output is correct |
51 |
Correct |
83 ms |
10488 KB |
Output is correct |
52 |
Correct |
97 ms |
11248 KB |
Output is correct |
53 |
Correct |
92 ms |
10856 KB |
Output is correct |
54 |
Correct |
143 ms |
17396 KB |
Output is correct |
55 |
Correct |
137 ms |
16500 KB |
Output is correct |
56 |
Correct |
431 ms |
79796 KB |
Output is correct |
57 |
Correct |
464 ms |
79920 KB |
Output is correct |
58 |
Correct |
512 ms |
80176 KB |
Output is correct |
59 |
Correct |
539 ms |
80324 KB |
Output is correct |
60 |
Correct |
452 ms |
80104 KB |
Output is correct |
61 |
Correct |
458 ms |
80032 KB |
Output is correct |
62 |
Correct |
451 ms |
80648 KB |
Output is correct |
63 |
Correct |
447 ms |
80876 KB |
Output is correct |
64 |
Correct |
459 ms |
81188 KB |
Output is correct |
65 |
Correct |
437 ms |
80052 KB |
Output is correct |
66 |
Correct |
513 ms |
80980 KB |
Output is correct |
67 |
Correct |
499 ms |
80956 KB |
Output is correct |
68 |
Correct |
479 ms |
81324 KB |
Output is correct |
69 |
Correct |
80 ms |
10088 KB |
Output is correct |
70 |
Correct |
80 ms |
10100 KB |
Output is correct |
71 |
Correct |
429 ms |
81004 KB |
Output is correct |
72 |
Correct |
438 ms |
81436 KB |
Output is correct |
73 |
Correct |
502 ms |
81008 KB |
Output is correct |
74 |
Correct |
76 ms |
10088 KB |
Output is correct |
75 |
Correct |
77 ms |
10276 KB |
Output is correct |
76 |
Correct |
78 ms |
10232 KB |
Output is correct |
77 |
Correct |
75 ms |
10088 KB |
Output is correct |
78 |
Correct |
508 ms |
80804 KB |
Output is correct |
79 |
Correct |
454 ms |
80616 KB |
Output is correct |
80 |
Correct |
531 ms |
81436 KB |
Output is correct |
81 |
Correct |
479 ms |
81136 KB |
Output is correct |
82 |
Correct |
523 ms |
81392 KB |
Output is correct |
83 |
Correct |
533 ms |
80920 KB |
Output is correct |
84 |
Correct |
81 ms |
10092 KB |
Output is correct |
85 |
Correct |
90 ms |
10088 KB |
Output is correct |
86 |
Correct |
80 ms |
10304 KB |
Output is correct |
87 |
Correct |
88 ms |
10664 KB |
Output is correct |
88 |
Correct |
98 ms |
11264 KB |
Output is correct |
89 |
Correct |
98 ms |
11548 KB |
Output is correct |
90 |
Correct |
94 ms |
10980 KB |
Output is correct |
91 |
Correct |
102 ms |
11356 KB |
Output is correct |
92 |
Correct |
105 ms |
10848 KB |
Output is correct |
93 |
Correct |
106 ms |
11388 KB |
Output is correct |
94 |
Correct |
97 ms |
10852 KB |
Output is correct |
95 |
Correct |
104 ms |
11596 KB |
Output is correct |
96 |
Correct |
101 ms |
11368 KB |
Output is correct |
97 |
Correct |
99 ms |
11368 KB |
Output is correct |
98 |
Correct |
94 ms |
10872 KB |
Output is correct |
99 |
Correct |
102 ms |
11412 KB |
Output is correct |
100 |
Correct |
94 ms |
10848 KB |
Output is correct |
101 |
Correct |
144 ms |
16480 KB |
Output is correct |
102 |
Correct |
150 ms |
16248 KB |
Output is correct |
103 |
Correct |
537 ms |
79792 KB |
Output is correct |
104 |
Correct |
506 ms |
80052 KB |
Output is correct |
105 |
Correct |
481 ms |
79812 KB |
Output is correct |
106 |
Correct |
533 ms |
80792 KB |
Output is correct |
107 |
Correct |
475 ms |
80020 KB |
Output is correct |
108 |
Correct |
547 ms |
80052 KB |
Output is correct |
109 |
Correct |
540 ms |
80736 KB |
Output is correct |
110 |
Correct |
576 ms |
80444 KB |
Output is correct |
111 |
Correct |
538 ms |
81136 KB |
Output is correct |
112 |
Correct |
460 ms |
80512 KB |
Output is correct |
113 |
Correct |
634 ms |
81260 KB |
Output is correct |
114 |
Correct |
517 ms |
80816 KB |
Output is correct |
115 |
Correct |
540 ms |
81044 KB |
Output is correct |