Submission #172273

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
172273	2019-12-31T22:54:00 Z	ijxjdjd	Arranging Shoes (IOI19_shoes)	Java 11	100 / 100	535 ms	45872 KB

shoes

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.

Subtask #1

10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	88 ms	9568 KB	Output is correct
2	Correct	85 ms	9584 KB	Output is correct

Subtask #2

20.0 / 20.0

#	Verdict	Execution time	Memory	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

Subtask #3

20.0 / 20.0

#	Verdict	Execution time	Memory	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

Subtask #4

15.0 / 15.0

#	Verdict	Execution time	Memory	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

Subtask #5

20.0 / 20.0

#	Verdict	Execution time	Memory	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

Subtask #6

15.0 / 15.0

#	Verdict	Execution time	Memory	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