Submission #143077

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
143077	2019-08-13T00:35:18 Z	model_code	Arranging Shoes (IOI19_shoes)	Java 11	100 / 100	263 ms	16512 KB

shoes

class shoes {

	private void change(int[] v) {
		int n = v.length / 2;

		int[] cnt = new int[n];
		for(int i = 0; i < n; i++)
			cnt[i] = 0;

		for(int i = 0; i < 2*n; i++)
			if(v[i] > 0)
				cnt[v[i] - 1]++;

		for(int i = 1; i < n; i++)
			cnt[i] += cnt[i-1];


		int[] cntl = new int[n];
		int[] cntr = new int[n];
		for(int i = 0; i < n; i++) {
			cntl[i] = cnt[i];
			cntr[i] = cnt[i];
		}

		for(int i = 0; i < 2*n; i++)
			if(v[i] > 0)
				v[i] = (--cntr[v[i] - 1]) + 1;
			else
				v[i] = -((--cntl[-v[i] - 1]) + 1);
	}


    public long count_swaps(int[] in) {
		change(in);

        int n = in.length / 2;
        
        int where[] = new int[n + 1];
        for (int i = 1; i <= n; ++i)
            where[i] = -1;

        for (int i = 0; i != 2 * n; ++i)
            if (where[Math.abs(in[i])] == -1)
                where[Math.abs(in[i])] = i;
        
        long ans = 0;

        int fenw[] = new int[2 * n];
        for (int i = 0; i != 2 * n; ++i)
            fenw[i] = (i + 1) - (i & (i + 1));
        
        for (int pos = 2 * n - 1; pos >= 0; --pos) {
            if (where[Math.abs(in[pos])] == pos)
                continue;

            int i = where[Math.abs(in[pos])];

            int dist = 0;

            for (int p = pos; p >= 0; p = (p & (p + 1)) - 1)
                dist += fenw[p];
            for (int p = i; p >= 0; p = (p & (p + 1)) - 1)
                dist -= fenw[p];
            
            if (in[pos] > 0)
                --dist;

            ans += dist;
            for (int p = i; p < 2 * n; p = p | (p + 1))
                fenw[p] -= 1;
        }
        
        return ans;
    }

    // public static void main(String[] argv) {
    //     shoe sh = new shoe();
    //     int[] test = new int[4];
    //     test[0] = -2;
    //     test[1] = -1;
    //     test[2] = 1;
    //     test[3] = 2;
    //     sh.count_swaps(test);
    // }
}

Subtask #1

10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	87 ms	9596 KB	Output is correct
2	Correct	88 ms	9496 KB	Output is correct

Subtask #2

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	87 ms	9596 KB	Output is correct
2	Correct	88 ms	9496 KB	Output is correct
3	Correct	85 ms	9648 KB	Output is correct
4	Correct	89 ms	9668 KB	Output is correct
5	Correct	86 ms	9680 KB	Output is correct
6	Correct	88 ms	9616 KB	Output is correct
7	Correct	85 ms	9440 KB	Output is correct
8	Correct	87 ms	9456 KB	Output is correct
9	Correct	86 ms	9336 KB	Output is correct
10	Correct	87 ms	9464 KB	Output is correct
11	Correct	84 ms	9676 KB	Output is correct
12	Correct	85 ms	9624 KB	Output is correct
13	Correct	84 ms	9744 KB	Output is correct
14	Correct	86 ms	9596 KB	Output is correct
15	Correct	85 ms	9616 KB	Output is correct
16	Correct	87 ms	9500 KB	Output is correct
17	Correct	89 ms	9480 KB	Output is correct
18	Correct	85 ms	9720 KB	Output is correct
19	Correct	86 ms	9608 KB	Output is correct
20	Correct	86 ms	9484 KB	Output is correct
21	Correct	86 ms	9740 KB	Output is correct
22	Correct	87 ms	9432 KB	Output is correct
23	Correct	84 ms	9656 KB	Output is correct
24	Correct	84 ms	9580 KB	Output is correct
25	Correct	85 ms	9716 KB	Output is correct
26	Correct	85 ms	9596 KB	Output is correct
27	Correct	86 ms	9620 KB	Output is correct
28	Correct	85 ms	9756 KB	Output is correct
29	Correct	87 ms	9676 KB	Output is correct
30	Correct	86 ms	9624 KB	Output is correct
31	Correct	86 ms	9652 KB	Output is correct
32	Correct	86 ms	9760 KB	Output is correct
33	Correct	90 ms	9488 KB	Output is correct
34	Correct	82 ms	9480 KB	Output is correct
35	Correct	85 ms	9400 KB	Output is correct
36	Correct	85 ms	9540 KB	Output is correct

Subtask #3

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	87 ms	9596 KB	Output is correct
2	Correct	88 ms	9496 KB	Output is correct
3	Correct	83 ms	9560 KB	Output is correct
4	Correct	85 ms	9408 KB	Output is correct
5	Correct	85 ms	9508 KB	Output is correct
6	Correct	85 ms	9488 KB	Output is correct
7	Correct	86 ms	9440 KB	Output is correct
8	Correct	84 ms	9548 KB	Output is correct
9	Correct	89 ms	9612 KB	Output is correct
10	Correct	90 ms	9500 KB	Output is correct
11	Correct	84 ms	9596 KB	Output is correct
12	Correct	84 ms	9484 KB	Output is correct
13	Correct	85 ms	9396 KB	Output is correct
14	Correct	92 ms	9504 KB	Output is correct
15	Correct	87 ms	9592 KB	Output is correct
16	Correct	86 ms	9604 KB	Output is correct
17	Correct	88 ms	9576 KB	Output is correct
18	Correct	92 ms	9636 KB	Output is correct
19	Correct	93 ms	9836 KB	Output is correct
20	Correct	117 ms	10996 KB	Output is correct
21	Correct	125 ms	10656 KB	Output is correct
22	Correct	202 ms	15148 KB	Output is correct
23	Correct	197 ms	14784 KB	Output is correct
24	Correct	205 ms	14112 KB	Output is correct
25	Correct	216 ms	14956 KB	Output is correct
26	Correct	209 ms	14236 KB	Output is correct
27	Correct	188 ms	14244 KB	Output is correct
28	Correct	214 ms	14788 KB	Output is correct
29	Correct	216 ms	14236 KB	Output is correct
30	Correct	218 ms	15128 KB	Output is correct
31	Correct	210 ms	14496 KB	Output is correct
32	Correct	212 ms	14732 KB	Output is correct
33	Correct	219 ms	14364 KB	Output is correct
34	Correct	216 ms	14884 KB	Output is correct
35	Correct	84 ms	9468 KB	Output is correct
36	Correct	88 ms	9540 KB	Output is correct
37	Correct	263 ms	16512 KB	Output is correct
38	Correct	223 ms	14968 KB	Output is correct
39	Correct	225 ms	15124 KB	Output is correct

Subtask #4

15.0 / 15.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	86 ms	9536 KB	Output is correct
2	Correct	88 ms	9596 KB	Output is correct
3	Correct	89 ms	9592 KB	Output is correct
4	Correct	95 ms	9640 KB	Output is correct
5	Correct	237 ms	15096 KB	Output is correct
6	Correct	228 ms	14884 KB	Output is correct
7	Correct	220 ms	15028 KB	Output is correct
8	Correct	207 ms	14908 KB	Output is correct
9	Correct	240 ms	15432 KB	Output is correct
10	Correct	223 ms	14432 KB	Output is correct

Subtask #5

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	87 ms	9596 KB	Output is correct
2	Correct	88 ms	9496 KB	Output is correct
3	Correct	85 ms	9648 KB	Output is correct
4	Correct	89 ms	9668 KB	Output is correct
5	Correct	86 ms	9680 KB	Output is correct
6	Correct	88 ms	9616 KB	Output is correct
7	Correct	85 ms	9440 KB	Output is correct
8	Correct	87 ms	9456 KB	Output is correct
9	Correct	86 ms	9336 KB	Output is correct
10	Correct	87 ms	9464 KB	Output is correct
11	Correct	84 ms	9676 KB	Output is correct
12	Correct	85 ms	9624 KB	Output is correct
13	Correct	84 ms	9744 KB	Output is correct
14	Correct	86 ms	9596 KB	Output is correct
15	Correct	85 ms	9616 KB	Output is correct
16	Correct	87 ms	9500 KB	Output is correct
17	Correct	89 ms	9480 KB	Output is correct
18	Correct	85 ms	9720 KB	Output is correct
19	Correct	86 ms	9608 KB	Output is correct
20	Correct	86 ms	9484 KB	Output is correct
21	Correct	86 ms	9740 KB	Output is correct
22	Correct	87 ms	9432 KB	Output is correct
23	Correct	84 ms	9656 KB	Output is correct
24	Correct	84 ms	9580 KB	Output is correct
25	Correct	85 ms	9716 KB	Output is correct
26	Correct	85 ms	9596 KB	Output is correct
27	Correct	86 ms	9620 KB	Output is correct
28	Correct	85 ms	9756 KB	Output is correct
29	Correct	87 ms	9676 KB	Output is correct
30	Correct	86 ms	9624 KB	Output is correct
31	Correct	86 ms	9652 KB	Output is correct
32	Correct	86 ms	9760 KB	Output is correct
33	Correct	90 ms	9488 KB	Output is correct
34	Correct	82 ms	9480 KB	Output is correct
35	Correct	85 ms	9400 KB	Output is correct
36	Correct	85 ms	9540 KB	Output is correct
37	Correct	88 ms	9436 KB	Output is correct
38	Correct	88 ms	9412 KB	Output is correct
39	Correct	88 ms	9480 KB	Output is correct
40	Correct	88 ms	9540 KB	Output is correct
41	Correct	93 ms	9980 KB	Output is correct
42	Correct	93 ms	9728 KB	Output is correct
43	Correct	92 ms	9708 KB	Output is correct
44	Correct	97 ms	9876 KB	Output is correct
45	Correct	89 ms	9612 KB	Output is correct
46	Correct	93 ms	9952 KB	Output is correct
47	Correct	99 ms	9752 KB	Output is correct
48	Correct	92 ms	9652 KB	Output is correct
49	Correct	94 ms	9576 KB	Output is correct
50	Correct	93 ms	9568 KB	Output is correct
51	Correct	97 ms	9588 KB	Output is correct
52	Correct	91 ms	9592 KB	Output is correct

Subtask #6

15.0 / 15.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	87 ms	9596 KB	Output is correct
2	Correct	88 ms	9496 KB	Output is correct
3	Correct	85 ms	9648 KB	Output is correct
4	Correct	89 ms	9668 KB	Output is correct
5	Correct	86 ms	9680 KB	Output is correct
6	Correct	88 ms	9616 KB	Output is correct
7	Correct	85 ms	9440 KB	Output is correct
8	Correct	87 ms	9456 KB	Output is correct
9	Correct	86 ms	9336 KB	Output is correct
10	Correct	87 ms	9464 KB	Output is correct
11	Correct	84 ms	9676 KB	Output is correct
12	Correct	85 ms	9624 KB	Output is correct
13	Correct	84 ms	9744 KB	Output is correct
14	Correct	86 ms	9596 KB	Output is correct
15	Correct	85 ms	9616 KB	Output is correct
16	Correct	87 ms	9500 KB	Output is correct
17	Correct	89 ms	9480 KB	Output is correct
18	Correct	85 ms	9720 KB	Output is correct
19	Correct	86 ms	9608 KB	Output is correct
20	Correct	86 ms	9484 KB	Output is correct
21	Correct	86 ms	9740 KB	Output is correct
22	Correct	87 ms	9432 KB	Output is correct
23	Correct	84 ms	9656 KB	Output is correct
24	Correct	84 ms	9580 KB	Output is correct
25	Correct	85 ms	9716 KB	Output is correct
26	Correct	85 ms	9596 KB	Output is correct
27	Correct	86 ms	9620 KB	Output is correct
28	Correct	85 ms	9756 KB	Output is correct
29	Correct	87 ms	9676 KB	Output is correct
30	Correct	86 ms	9624 KB	Output is correct
31	Correct	86 ms	9652 KB	Output is correct
32	Correct	86 ms	9760 KB	Output is correct
33	Correct	90 ms	9488 KB	Output is correct
34	Correct	82 ms	9480 KB	Output is correct
35	Correct	85 ms	9400 KB	Output is correct
36	Correct	85 ms	9540 KB	Output is correct
37	Correct	83 ms	9560 KB	Output is correct
38	Correct	85 ms	9408 KB	Output is correct
39	Correct	85 ms	9508 KB	Output is correct
40	Correct	85 ms	9488 KB	Output is correct
41	Correct	86 ms	9440 KB	Output is correct
42	Correct	84 ms	9548 KB	Output is correct
43	Correct	89 ms	9612 KB	Output is correct
44	Correct	90 ms	9500 KB	Output is correct
45	Correct	84 ms	9596 KB	Output is correct
46	Correct	84 ms	9484 KB	Output is correct
47	Correct	85 ms	9396 KB	Output is correct
48	Correct	92 ms	9504 KB	Output is correct
49	Correct	87 ms	9592 KB	Output is correct
50	Correct	86 ms	9604 KB	Output is correct
51	Correct	88 ms	9576 KB	Output is correct
52	Correct	92 ms	9636 KB	Output is correct
53	Correct	93 ms	9836 KB	Output is correct
54	Correct	117 ms	10996 KB	Output is correct
55	Correct	125 ms	10656 KB	Output is correct
56	Correct	202 ms	15148 KB	Output is correct
57	Correct	197 ms	14784 KB	Output is correct
58	Correct	205 ms	14112 KB	Output is correct
59	Correct	216 ms	14956 KB	Output is correct
60	Correct	209 ms	14236 KB	Output is correct
61	Correct	188 ms	14244 KB	Output is correct
62	Correct	214 ms	14788 KB	Output is correct
63	Correct	216 ms	14236 KB	Output is correct
64	Correct	218 ms	15128 KB	Output is correct
65	Correct	210 ms	14496 KB	Output is correct
66	Correct	212 ms	14732 KB	Output is correct
67	Correct	219 ms	14364 KB	Output is correct
68	Correct	216 ms	14884 KB	Output is correct
69	Correct	84 ms	9468 KB	Output is correct
70	Correct	88 ms	9540 KB	Output is correct
71	Correct	263 ms	16512 KB	Output is correct
72	Correct	223 ms	14968 KB	Output is correct
73	Correct	225 ms	15124 KB	Output is correct
74	Correct	86 ms	9536 KB	Output is correct
75	Correct	88 ms	9596 KB	Output is correct
76	Correct	89 ms	9592 KB	Output is correct
77	Correct	95 ms	9640 KB	Output is correct
78	Correct	237 ms	15096 KB	Output is correct
79	Correct	228 ms	14884 KB	Output is correct
80	Correct	220 ms	15028 KB	Output is correct
81	Correct	207 ms	14908 KB	Output is correct
82	Correct	240 ms	15432 KB	Output is correct
83	Correct	223 ms	14432 KB	Output is correct
84	Correct	88 ms	9436 KB	Output is correct
85	Correct	88 ms	9412 KB	Output is correct
86	Correct	88 ms	9480 KB	Output is correct
87	Correct	88 ms	9540 KB	Output is correct
88	Correct	93 ms	9980 KB	Output is correct
89	Correct	93 ms	9728 KB	Output is correct
90	Correct	92 ms	9708 KB	Output is correct
91	Correct	97 ms	9876 KB	Output is correct
92	Correct	89 ms	9612 KB	Output is correct
93	Correct	93 ms	9952 KB	Output is correct
94	Correct	99 ms	9752 KB	Output is correct
95	Correct	92 ms	9652 KB	Output is correct
96	Correct	94 ms	9576 KB	Output is correct
97	Correct	93 ms	9568 KB	Output is correct
98	Correct	97 ms	9588 KB	Output is correct
99	Correct	91 ms	9592 KB	Output is correct
100	Correct	92 ms	9764 KB	Output is correct
101	Correct	122 ms	11152 KB	Output is correct
102	Correct	125 ms	10904 KB	Output is correct
103	Correct	239 ms	14848 KB	Output is correct
104	Correct	197 ms	14180 KB	Output is correct
105	Correct	218 ms	14632 KB	Output is correct
106	Correct	215 ms	15008 KB	Output is correct
107	Correct	202 ms	14528 KB	Output is correct
108	Correct	204 ms	14756 KB	Output is correct
109	Correct	231 ms	13968 KB	Output is correct
110	Correct	210 ms	15088 KB	Output is correct
111	Correct	222 ms	14916 KB	Output is correct
112	Correct	207 ms	14180 KB	Output is correct
113	Correct	226 ms	15240 KB	Output is correct
114	Correct	214 ms	14740 KB	Output is correct
115	Correct	234 ms	14504 KB	Output is correct