Submission #143793

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
143793	2019-08-15T06:53:09 Z	ainta	Arranging Shoes (IOI19_shoes)	C++17	100 / 100	101 ms	14572 KB

shoes

#include "shoes.h"
#include <cstdio>
#include <algorithm>
#include <vector>
using namespace std;

#define pii pair<int,int>

vector<int>A[101000], B[101000];
int n, BIT[201000];


void Add(int a, int b) {
	while (a <= 2 * n) {
		BIT[a] += b;
		a += (a&-a);
	}
}
int Sum(int a){
	int r = 0;
	while (a) {
		r += BIT[a];
		a -= (a&-a);
	}
	return r;
}

vector<pii>V;

long long count_swaps(std::vector<int> s) {
	int i, j;
	n = s.size() / 2;
	for (i = 0; i < 2 * n; i++) {
		if (s[i] < 0)A[-s[i]].push_back(i+1);
		else B[s[i]].push_back(i + 1);
	}
	long long res = 0;
	for (i = 1; i <= n; i++) {
		for (j = 0; j < A[i].size(); j++) {
			int t1 = A[i][j], t2 = B[i][j];
			if (t1 > t2) {
				res++;
				swap(t1, t2);
			}
			V.push_back({ t1,t2 });
		}
	}
	sort(V.begin(), V.end());
	for (auto &t : V) {
		int s1 = Sum(t.first);
		int s2 = Sum(t.second);
		int s3 = Sum(2 * n);
		res += s2 - s1 + (s3 - s2) * 2;
		Add(t.second, 1);
	}
	return res;
}

Compilation message

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:39:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (j = 0; j < A[i].size(); j++) {
               ~~^~~~~~~~~~~~~

Subtask #1

10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	6 ms	5116 KB	Output is correct
2	Correct	6 ms	4984 KB	Output is correct

Subtask #2

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	6 ms	5116 KB	Output is correct
2	Correct	6 ms	4984 KB	Output is correct
3	Correct	6 ms	4988 KB	Output is correct
4	Correct	6 ms	4984 KB	Output is correct
5	Correct	6 ms	4984 KB	Output is correct
6	Correct	6 ms	5112 KB	Output is correct
7	Correct	7 ms	4984 KB	Output is correct
8	Correct	12 ms	5084 KB	Output is correct
9	Correct	6 ms	4984 KB	Output is correct
10	Correct	6 ms	5112 KB	Output is correct
11	Correct	6 ms	4984 KB	Output is correct
12	Correct	6 ms	5112 KB	Output is correct
13	Correct	6 ms	4984 KB	Output is correct
14	Correct	6 ms	5112 KB	Output is correct
15	Correct	6 ms	5112 KB	Output is correct
16	Correct	6 ms	5112 KB	Output is correct
17	Correct	7 ms	5112 KB	Output is correct
18	Correct	6 ms	5112 KB	Output is correct
19	Correct	6 ms	5112 KB	Output is correct
20	Correct	6 ms	5112 KB	Output is correct
21	Correct	6 ms	5112 KB	Output is correct
22	Correct	6 ms	5112 KB	Output is correct
23	Correct	10 ms	5112 KB	Output is correct
24	Correct	6 ms	4988 KB	Output is correct
25	Correct	5 ms	5084 KB	Output is correct
26	Correct	6 ms	5112 KB	Output is correct
27	Correct	6 ms	4984 KB	Output is correct
28	Correct	6 ms	5112 KB	Output is correct
29	Correct	6 ms	4984 KB	Output is correct
30	Correct	6 ms	5112 KB	Output is correct
31	Correct	6 ms	4988 KB	Output is correct
32	Correct	6 ms	5084 KB	Output is correct
33	Correct	6 ms	5112 KB	Output is correct
34	Correct	6 ms	5112 KB	Output is correct
35	Correct	6 ms	5112 KB	Output is correct
36	Correct	6 ms	4984 KB	Output is correct

Subtask #3

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	6 ms	5116 KB	Output is correct
2	Correct	6 ms	4984 KB	Output is correct
3	Correct	6 ms	5112 KB	Output is correct
4	Correct	6 ms	5112 KB	Output is correct
5	Correct	6 ms	4988 KB	Output is correct
6	Correct	6 ms	4984 KB	Output is correct
7	Correct	6 ms	5112 KB	Output is correct
8	Correct	6 ms	4984 KB	Output is correct
9	Correct	6 ms	4984 KB	Output is correct
10	Correct	7 ms	5112 KB	Output is correct
11	Correct	6 ms	5112 KB	Output is correct
12	Correct	6 ms	4984 KB	Output is correct
13	Correct	7 ms	5112 KB	Output is correct
14	Correct	6 ms	4984 KB	Output is correct
15	Correct	6 ms	4984 KB	Output is correct
16	Correct	6 ms	4984 KB	Output is correct
17	Correct	6 ms	5112 KB	Output is correct
18	Correct	6 ms	5112 KB	Output is correct
19	Correct	6 ms	5032 KB	Output is correct
20	Correct	10 ms	5624 KB	Output is correct
21	Correct	10 ms	5624 KB	Output is correct
22	Correct	45 ms	9080 KB	Output is correct
23	Correct	42 ms	9036 KB	Output is correct
24	Correct	45 ms	9064 KB	Output is correct
25	Correct	41 ms	8728 KB	Output is correct
26	Correct	46 ms	9184 KB	Output is correct
27	Correct	41 ms	9064 KB	Output is correct
28	Correct	42 ms	8684 KB	Output is correct
29	Correct	42 ms	8684 KB	Output is correct
30	Correct	42 ms	8684 KB	Output is correct
31	Correct	45 ms	9088 KB	Output is correct
32	Correct	42 ms	8676 KB	Output is correct
33	Correct	40 ms	8688 KB	Output is correct
34	Correct	42 ms	8688 KB	Output is correct
35	Correct	6 ms	5112 KB	Output is correct
36	Correct	6 ms	5112 KB	Output is correct
37	Correct	42 ms	8656 KB	Output is correct
38	Correct	42 ms	8684 KB	Output is correct
39	Correct	42 ms	8684 KB	Output is correct

Subtask #4

15.0 / 15.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	6 ms	4984 KB	Output is correct
2	Correct	6 ms	5112 KB	Output is correct
3	Correct	6 ms	4984 KB	Output is correct
4	Correct	6 ms	4984 KB	Output is correct
5	Correct	83 ms	14200 KB	Output is correct
6	Correct	68 ms	9452 KB	Output is correct
7	Correct	85 ms	14188 KB	Output is correct
8	Correct	50 ms	8808 KB	Output is correct
9	Correct	85 ms	14316 KB	Output is correct
10	Correct	80 ms	11164 KB	Output is correct

Subtask #5

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	6 ms	5116 KB	Output is correct
2	Correct	6 ms	4984 KB	Output is correct
3	Correct	6 ms	4988 KB	Output is correct
4	Correct	6 ms	4984 KB	Output is correct
5	Correct	6 ms	4984 KB	Output is correct
6	Correct	6 ms	5112 KB	Output is correct
7	Correct	7 ms	4984 KB	Output is correct
8	Correct	12 ms	5084 KB	Output is correct
9	Correct	6 ms	4984 KB	Output is correct
10	Correct	6 ms	5112 KB	Output is correct
11	Correct	6 ms	4984 KB	Output is correct
12	Correct	6 ms	5112 KB	Output is correct
13	Correct	6 ms	4984 KB	Output is correct
14	Correct	6 ms	5112 KB	Output is correct
15	Correct	6 ms	5112 KB	Output is correct
16	Correct	6 ms	5112 KB	Output is correct
17	Correct	7 ms	5112 KB	Output is correct
18	Correct	6 ms	5112 KB	Output is correct
19	Correct	6 ms	5112 KB	Output is correct
20	Correct	6 ms	5112 KB	Output is correct
21	Correct	6 ms	5112 KB	Output is correct
22	Correct	6 ms	5112 KB	Output is correct
23	Correct	10 ms	5112 KB	Output is correct
24	Correct	6 ms	4988 KB	Output is correct
25	Correct	5 ms	5084 KB	Output is correct
26	Correct	6 ms	5112 KB	Output is correct
27	Correct	6 ms	4984 KB	Output is correct
28	Correct	6 ms	5112 KB	Output is correct
29	Correct	6 ms	4984 KB	Output is correct
30	Correct	6 ms	5112 KB	Output is correct
31	Correct	6 ms	4988 KB	Output is correct
32	Correct	6 ms	5084 KB	Output is correct
33	Correct	6 ms	5112 KB	Output is correct
34	Correct	6 ms	5112 KB	Output is correct
35	Correct	6 ms	5112 KB	Output is correct
36	Correct	6 ms	4984 KB	Output is correct
37	Correct	6 ms	4984 KB	Output is correct
38	Correct	7 ms	5112 KB	Output is correct
39	Correct	6 ms	4988 KB	Output is correct
40	Correct	6 ms	5112 KB	Output is correct
41	Correct	6 ms	5112 KB	Output is correct
42	Correct	6 ms	5112 KB	Output is correct
43	Correct	6 ms	5112 KB	Output is correct
44	Correct	7 ms	5112 KB	Output is correct
45	Correct	7 ms	5112 KB	Output is correct
46	Correct	6 ms	5112 KB	Output is correct
47	Correct	7 ms	5112 KB	Output is correct
48	Correct	6 ms	5112 KB	Output is correct
49	Correct	7 ms	5112 KB	Output is correct
50	Correct	6 ms	5112 KB	Output is correct
51	Correct	6 ms	5112 KB	Output is correct
52	Correct	7 ms	5084 KB	Output is correct

Subtask #6

15.0 / 15.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	6 ms	5116 KB	Output is correct
2	Correct	6 ms	4984 KB	Output is correct
3	Correct	6 ms	4988 KB	Output is correct
4	Correct	6 ms	4984 KB	Output is correct
5	Correct	6 ms	4984 KB	Output is correct
6	Correct	6 ms	5112 KB	Output is correct
7	Correct	7 ms	4984 KB	Output is correct
8	Correct	12 ms	5084 KB	Output is correct
9	Correct	6 ms	4984 KB	Output is correct
10	Correct	6 ms	5112 KB	Output is correct
11	Correct	6 ms	4984 KB	Output is correct
12	Correct	6 ms	5112 KB	Output is correct
13	Correct	6 ms	4984 KB	Output is correct
14	Correct	6 ms	5112 KB	Output is correct
15	Correct	6 ms	5112 KB	Output is correct
16	Correct	6 ms	5112 KB	Output is correct
17	Correct	7 ms	5112 KB	Output is correct
18	Correct	6 ms	5112 KB	Output is correct
19	Correct	6 ms	5112 KB	Output is correct
20	Correct	6 ms	5112 KB	Output is correct
21	Correct	6 ms	5112 KB	Output is correct
22	Correct	6 ms	5112 KB	Output is correct
23	Correct	10 ms	5112 KB	Output is correct
24	Correct	6 ms	4988 KB	Output is correct
25	Correct	5 ms	5084 KB	Output is correct
26	Correct	6 ms	5112 KB	Output is correct
27	Correct	6 ms	4984 KB	Output is correct
28	Correct	6 ms	5112 KB	Output is correct
29	Correct	6 ms	4984 KB	Output is correct
30	Correct	6 ms	5112 KB	Output is correct
31	Correct	6 ms	4988 KB	Output is correct
32	Correct	6 ms	5084 KB	Output is correct
33	Correct	6 ms	5112 KB	Output is correct
34	Correct	6 ms	5112 KB	Output is correct
35	Correct	6 ms	5112 KB	Output is correct
36	Correct	6 ms	4984 KB	Output is correct
37	Correct	6 ms	5112 KB	Output is correct
38	Correct	6 ms	5112 KB	Output is correct
39	Correct	6 ms	4988 KB	Output is correct
40	Correct	6 ms	4984 KB	Output is correct
41	Correct	6 ms	5112 KB	Output is correct
42	Correct	6 ms	4984 KB	Output is correct
43	Correct	6 ms	4984 KB	Output is correct
44	Correct	7 ms	5112 KB	Output is correct
45	Correct	6 ms	5112 KB	Output is correct
46	Correct	6 ms	4984 KB	Output is correct
47	Correct	7 ms	5112 KB	Output is correct
48	Correct	6 ms	4984 KB	Output is correct
49	Correct	6 ms	4984 KB	Output is correct
50	Correct	6 ms	4984 KB	Output is correct
51	Correct	6 ms	5112 KB	Output is correct
52	Correct	6 ms	5112 KB	Output is correct
53	Correct	6 ms	5032 KB	Output is correct
54	Correct	10 ms	5624 KB	Output is correct
55	Correct	10 ms	5624 KB	Output is correct
56	Correct	45 ms	9080 KB	Output is correct
57	Correct	42 ms	9036 KB	Output is correct
58	Correct	45 ms	9064 KB	Output is correct
59	Correct	41 ms	8728 KB	Output is correct
60	Correct	46 ms	9184 KB	Output is correct
61	Correct	41 ms	9064 KB	Output is correct
62	Correct	42 ms	8684 KB	Output is correct
63	Correct	42 ms	8684 KB	Output is correct
64	Correct	42 ms	8684 KB	Output is correct
65	Correct	45 ms	9088 KB	Output is correct
66	Correct	42 ms	8676 KB	Output is correct
67	Correct	40 ms	8688 KB	Output is correct
68	Correct	42 ms	8688 KB	Output is correct
69	Correct	6 ms	5112 KB	Output is correct
70	Correct	6 ms	5112 KB	Output is correct
71	Correct	42 ms	8656 KB	Output is correct
72	Correct	42 ms	8684 KB	Output is correct
73	Correct	42 ms	8684 KB	Output is correct
74	Correct	6 ms	4984 KB	Output is correct
75	Correct	6 ms	5112 KB	Output is correct
76	Correct	6 ms	4984 KB	Output is correct
77	Correct	6 ms	4984 KB	Output is correct
78	Correct	83 ms	14200 KB	Output is correct
79	Correct	68 ms	9452 KB	Output is correct
80	Correct	85 ms	14188 KB	Output is correct
81	Correct	50 ms	8808 KB	Output is correct
82	Correct	85 ms	14316 KB	Output is correct
83	Correct	80 ms	11164 KB	Output is correct
84	Correct	6 ms	4984 KB	Output is correct
85	Correct	7 ms	5112 KB	Output is correct
86	Correct	6 ms	4988 KB	Output is correct
87	Correct	6 ms	5112 KB	Output is correct
88	Correct	6 ms	5112 KB	Output is correct
89	Correct	6 ms	5112 KB	Output is correct
90	Correct	6 ms	5112 KB	Output is correct
91	Correct	7 ms	5112 KB	Output is correct
92	Correct	7 ms	5112 KB	Output is correct
93	Correct	6 ms	5112 KB	Output is correct
94	Correct	7 ms	5112 KB	Output is correct
95	Correct	6 ms	5112 KB	Output is correct
96	Correct	7 ms	5112 KB	Output is correct
97	Correct	6 ms	5112 KB	Output is correct
98	Correct	6 ms	5112 KB	Output is correct
99	Correct	7 ms	5084 KB	Output is correct
100	Correct	7 ms	5112 KB	Output is correct
101	Correct	13 ms	6136 KB	Output is correct
102	Correct	12 ms	5752 KB	Output is correct
103	Correct	95 ms	14572 KB	Output is correct
104	Correct	92 ms	14572 KB	Output is correct
105	Correct	93 ms	11884 KB	Output is correct
106	Correct	85 ms	14188 KB	Output is correct
107	Correct	73 ms	9976 KB	Output is correct
108	Correct	73 ms	10220 KB	Output is correct
109	Correct	51 ms	9196 KB	Output is correct
110	Correct	42 ms	8760 KB	Output is correct
111	Correct	84 ms	13548 KB	Output is correct
112	Correct	101 ms	13180 KB	Output is correct
113	Correct	79 ms	9452 KB	Output is correct
114	Correct	87 ms	14188 KB	Output is correct
115	Correct	86 ms	14188 KB	Output is correct