Submission #292124

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
292124	2020-09-06T11:55:27 Z	PeppaPig	Arranging Shoes (IOI19_shoes)	C++14	100 / 100	107 ms	20464 KB

shoes

#include "shoes.h"
#include <bits/stdc++.h>

#define long long long
#define pii pair<int, int>
#define x first
#define y second

using namespace std;

const int N = 2e5 + 5;

int t[N];

void update(int x, int k) {
	for(int i = x; i < N; i += i & -i)
		t[i] += k;
}

int query(int x, int ret = 0) {
	for(int i = x; i; i -= i & -i)
		ret += t[i];
	return ret;
}

int n;
long ans = 0;
vector<int> l[N], r[N];

long count_swaps(vector<int> s) {
	n = (int)s.size();

	for(int i = 0; i < n; i++) {
		if(s[i] < 0) l[-s[i]].emplace_back(i + 1);
		else r[s[i]].emplace_back(i + 1);
	}

	vector<pii> vec;
	for(int i = 1; i <= n; i++) for(int j = 0; j < l[i].size(); j++) {
		int x = l[i][j], y = r[i][j];	
		if(x > y) swap(x, y), ++ans;
		vec.emplace_back(x, y);
	}

	sort(vec.begin(), vec.end());

	for(int i = 1; i <= n; i++) update(i, 1);
	for(pii p : vec) {
		ans += query(p.x) + query(p.y) - 3;
		update(p.x, -1), update(p.y, -1);
	}

	return ans;
}

Compilation message

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:39:47: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |  for(int i = 1; i <= n; i++) for(int j = 0; j < l[i].size(); j++) {
      |                                             ~~^~~~~~~~~~~~~

Subtask #1

10.0 / 10.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	6 ms	9728 KB	Output is correct
2	Correct	6 ms	9728 KB	Output is correct

Subtask #2

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	6 ms	9728 KB	Output is correct
2	Correct	6 ms	9728 KB	Output is correct
3	Correct	7 ms	9728 KB	Output is correct
4	Correct	6 ms	9728 KB	Output is correct
5	Correct	6 ms	9728 KB	Output is correct
6	Correct	7 ms	9728 KB	Output is correct
7	Correct	6 ms	9728 KB	Output is correct
8	Correct	7 ms	9728 KB	Output is correct
9	Correct	7 ms	9728 KB	Output is correct
10	Correct	8 ms	9728 KB	Output is correct
11	Correct	6 ms	9728 KB	Output is correct
12	Correct	6 ms	9728 KB	Output is correct
13	Correct	6 ms	9728 KB	Output is correct
14	Correct	7 ms	9728 KB	Output is correct
15	Correct	6 ms	9728 KB	Output is correct
16	Correct	6 ms	9728 KB	Output is correct
17	Correct	6 ms	9728 KB	Output is correct
18	Correct	6 ms	9728 KB	Output is correct
19	Correct	6 ms	9728 KB	Output is correct
20	Correct	8 ms	9856 KB	Output is correct
21	Correct	7 ms	9728 KB	Output is correct
22	Correct	7 ms	9728 KB	Output is correct
23	Correct	7 ms	9728 KB	Output is correct
24	Correct	7 ms	9728 KB	Output is correct
25	Correct	7 ms	9728 KB	Output is correct
26	Correct	7 ms	9728 KB	Output is correct
27	Correct	7 ms	9728 KB	Output is correct
28	Correct	7 ms	9728 KB	Output is correct
29	Correct	7 ms	9728 KB	Output is correct
30	Correct	8 ms	9728 KB	Output is correct
31	Correct	7 ms	9728 KB	Output is correct
32	Correct	7 ms	9728 KB	Output is correct
33	Correct	8 ms	9728 KB	Output is correct
34	Correct	7 ms	9728 KB	Output is correct
35	Correct	7 ms	9728 KB	Output is correct
36	Correct	7 ms	9728 KB	Output is correct

Subtask #3

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	6 ms	9728 KB	Output is correct
2	Correct	6 ms	9728 KB	Output is correct
3	Correct	7 ms	9728 KB	Output is correct
4	Correct	7 ms	9728 KB	Output is correct
5	Correct	7 ms	9728 KB	Output is correct
6	Correct	7 ms	9728 KB	Output is correct
7	Correct	7 ms	9728 KB	Output is correct
8	Correct	7 ms	9728 KB	Output is correct
9	Correct	7 ms	9728 KB	Output is correct
10	Correct	7 ms	9728 KB	Output is correct
11	Correct	7 ms	9728 KB	Output is correct
12	Correct	7 ms	9728 KB	Output is correct
13	Correct	7 ms	9728 KB	Output is correct
14	Correct	7 ms	9728 KB	Output is correct
15	Correct	7 ms	9728 KB	Output is correct
16	Correct	7 ms	9728 KB	Output is correct
17	Correct	7 ms	9728 KB	Output is correct
18	Correct	7 ms	9728 KB	Output is correct
19	Correct	7 ms	9728 KB	Output is correct
20	Correct	11 ms	10240 KB	Output is correct
21	Correct	11 ms	10240 KB	Output is correct
22	Correct	52 ms	13716 KB	Output is correct
23	Correct	52 ms	15080 KB	Output is correct
24	Correct	53 ms	15080 KB	Output is correct
25	Correct	49 ms	14828 KB	Output is correct
26	Correct	53 ms	15080 KB	Output is correct
27	Correct	49 ms	14824 KB	Output is correct
28	Correct	50 ms	15084 KB	Output is correct
29	Correct	51 ms	15084 KB	Output is correct
30	Correct	53 ms	15016 KB	Output is correct
31	Correct	52 ms	15032 KB	Output is correct
32	Correct	49 ms	15084 KB	Output is correct
33	Correct	46 ms	14964 KB	Output is correct
34	Correct	49 ms	15124 KB	Output is correct
35	Correct	7 ms	9728 KB	Output is correct
36	Correct	7 ms	9728 KB	Output is correct
37	Correct	49 ms	15084 KB	Output is correct
38	Correct	60 ms	15000 KB	Output is correct
39	Correct	50 ms	15084 KB	Output is correct

Subtask #4

15.0 / 15.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	6 ms	9728 KB	Output is correct
2	Correct	6 ms	9728 KB	Output is correct
3	Correct	7 ms	9728 KB	Output is correct
4	Correct	7 ms	9728 KB	Output is correct
5	Correct	84 ms	19180 KB	Output is correct
6	Correct	69 ms	15724 KB	Output is correct
7	Correct	84 ms	20460 KB	Output is correct
8	Correct	56 ms	15164 KB	Output is correct
9	Correct	86 ms	20460 KB	Output is correct
10	Correct	82 ms	17388 KB	Output is correct

Subtask #5

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	6 ms	9728 KB	Output is correct
2	Correct	6 ms	9728 KB	Output is correct
3	Correct	7 ms	9728 KB	Output is correct
4	Correct	6 ms	9728 KB	Output is correct
5	Correct	6 ms	9728 KB	Output is correct
6	Correct	7 ms	9728 KB	Output is correct
7	Correct	6 ms	9728 KB	Output is correct
8	Correct	7 ms	9728 KB	Output is correct
9	Correct	7 ms	9728 KB	Output is correct
10	Correct	8 ms	9728 KB	Output is correct
11	Correct	6 ms	9728 KB	Output is correct
12	Correct	6 ms	9728 KB	Output is correct
13	Correct	6 ms	9728 KB	Output is correct
14	Correct	7 ms	9728 KB	Output is correct
15	Correct	6 ms	9728 KB	Output is correct
16	Correct	6 ms	9728 KB	Output is correct
17	Correct	6 ms	9728 KB	Output is correct
18	Correct	6 ms	9728 KB	Output is correct
19	Correct	6 ms	9728 KB	Output is correct
20	Correct	8 ms	9856 KB	Output is correct
21	Correct	7 ms	9728 KB	Output is correct
22	Correct	7 ms	9728 KB	Output is correct
23	Correct	7 ms	9728 KB	Output is correct
24	Correct	7 ms	9728 KB	Output is correct
25	Correct	7 ms	9728 KB	Output is correct
26	Correct	7 ms	9728 KB	Output is correct
27	Correct	7 ms	9728 KB	Output is correct
28	Correct	7 ms	9728 KB	Output is correct
29	Correct	7 ms	9728 KB	Output is correct
30	Correct	8 ms	9728 KB	Output is correct
31	Correct	7 ms	9728 KB	Output is correct
32	Correct	7 ms	9728 KB	Output is correct
33	Correct	8 ms	9728 KB	Output is correct
34	Correct	7 ms	9728 KB	Output is correct
35	Correct	7 ms	9728 KB	Output is correct
36	Correct	7 ms	9728 KB	Output is correct
37	Correct	6 ms	9728 KB	Output is correct
38	Correct	6 ms	9728 KB	Output is correct
39	Correct	6 ms	9728 KB	Output is correct
40	Correct	7 ms	9728 KB	Output is correct
41	Correct	8 ms	9856 KB	Output is correct
42	Correct	7 ms	9856 KB	Output is correct
43	Correct	7 ms	9856 KB	Output is correct
44	Correct	7 ms	9856 KB	Output is correct
45	Correct	7 ms	9856 KB	Output is correct
46	Correct	7 ms	9856 KB	Output is correct
47	Correct	7 ms	9856 KB	Output is correct
48	Correct	7 ms	9728 KB	Output is correct
49	Correct	7 ms	9728 KB	Output is correct
50	Correct	7 ms	9728 KB	Output is correct
51	Correct	7 ms	9728 KB	Output is correct
52	Correct	7 ms	9856 KB	Output is correct

Subtask #6

15.0 / 15.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	6 ms	9728 KB	Output is correct
2	Correct	6 ms	9728 KB	Output is correct
3	Correct	7 ms	9728 KB	Output is correct
4	Correct	6 ms	9728 KB	Output is correct
5	Correct	6 ms	9728 KB	Output is correct
6	Correct	7 ms	9728 KB	Output is correct
7	Correct	6 ms	9728 KB	Output is correct
8	Correct	7 ms	9728 KB	Output is correct
9	Correct	7 ms	9728 KB	Output is correct
10	Correct	8 ms	9728 KB	Output is correct
11	Correct	6 ms	9728 KB	Output is correct
12	Correct	6 ms	9728 KB	Output is correct
13	Correct	6 ms	9728 KB	Output is correct
14	Correct	7 ms	9728 KB	Output is correct
15	Correct	6 ms	9728 KB	Output is correct
16	Correct	6 ms	9728 KB	Output is correct
17	Correct	6 ms	9728 KB	Output is correct
18	Correct	6 ms	9728 KB	Output is correct
19	Correct	6 ms	9728 KB	Output is correct
20	Correct	8 ms	9856 KB	Output is correct
21	Correct	7 ms	9728 KB	Output is correct
22	Correct	7 ms	9728 KB	Output is correct
23	Correct	7 ms	9728 KB	Output is correct
24	Correct	7 ms	9728 KB	Output is correct
25	Correct	7 ms	9728 KB	Output is correct
26	Correct	7 ms	9728 KB	Output is correct
27	Correct	7 ms	9728 KB	Output is correct
28	Correct	7 ms	9728 KB	Output is correct
29	Correct	7 ms	9728 KB	Output is correct
30	Correct	8 ms	9728 KB	Output is correct
31	Correct	7 ms	9728 KB	Output is correct
32	Correct	7 ms	9728 KB	Output is correct
33	Correct	8 ms	9728 KB	Output is correct
34	Correct	7 ms	9728 KB	Output is correct
35	Correct	7 ms	9728 KB	Output is correct
36	Correct	7 ms	9728 KB	Output is correct
37	Correct	7 ms	9728 KB	Output is correct
38	Correct	7 ms	9728 KB	Output is correct
39	Correct	7 ms	9728 KB	Output is correct
40	Correct	7 ms	9728 KB	Output is correct
41	Correct	7 ms	9728 KB	Output is correct
42	Correct	7 ms	9728 KB	Output is correct
43	Correct	7 ms	9728 KB	Output is correct
44	Correct	7 ms	9728 KB	Output is correct
45	Correct	7 ms	9728 KB	Output is correct
46	Correct	7 ms	9728 KB	Output is correct
47	Correct	7 ms	9728 KB	Output is correct
48	Correct	7 ms	9728 KB	Output is correct
49	Correct	7 ms	9728 KB	Output is correct
50	Correct	7 ms	9728 KB	Output is correct
51	Correct	7 ms	9728 KB	Output is correct
52	Correct	7 ms	9728 KB	Output is correct
53	Correct	7 ms	9728 KB	Output is correct
54	Correct	11 ms	10240 KB	Output is correct
55	Correct	11 ms	10240 KB	Output is correct
56	Correct	52 ms	13716 KB	Output is correct
57	Correct	52 ms	15080 KB	Output is correct
58	Correct	53 ms	15080 KB	Output is correct
59	Correct	49 ms	14828 KB	Output is correct
60	Correct	53 ms	15080 KB	Output is correct
61	Correct	49 ms	14824 KB	Output is correct
62	Correct	50 ms	15084 KB	Output is correct
63	Correct	51 ms	15084 KB	Output is correct
64	Correct	53 ms	15016 KB	Output is correct
65	Correct	52 ms	15032 KB	Output is correct
66	Correct	49 ms	15084 KB	Output is correct
67	Correct	46 ms	14964 KB	Output is correct
68	Correct	49 ms	15124 KB	Output is correct
69	Correct	7 ms	9728 KB	Output is correct
70	Correct	7 ms	9728 KB	Output is correct
71	Correct	49 ms	15084 KB	Output is correct
72	Correct	60 ms	15000 KB	Output is correct
73	Correct	50 ms	15084 KB	Output is correct
74	Correct	6 ms	9728 KB	Output is correct
75	Correct	6 ms	9728 KB	Output is correct
76	Correct	7 ms	9728 KB	Output is correct
77	Correct	7 ms	9728 KB	Output is correct
78	Correct	84 ms	19180 KB	Output is correct
79	Correct	69 ms	15724 KB	Output is correct
80	Correct	84 ms	20460 KB	Output is correct
81	Correct	56 ms	15164 KB	Output is correct
82	Correct	86 ms	20460 KB	Output is correct
83	Correct	82 ms	17388 KB	Output is correct
84	Correct	6 ms	9728 KB	Output is correct
85	Correct	6 ms	9728 KB	Output is correct
86	Correct	6 ms	9728 KB	Output is correct
87	Correct	7 ms	9728 KB	Output is correct
88	Correct	8 ms	9856 KB	Output is correct
89	Correct	7 ms	9856 KB	Output is correct
90	Correct	7 ms	9856 KB	Output is correct
91	Correct	7 ms	9856 KB	Output is correct
92	Correct	7 ms	9856 KB	Output is correct
93	Correct	7 ms	9856 KB	Output is correct
94	Correct	7 ms	9856 KB	Output is correct
95	Correct	7 ms	9728 KB	Output is correct
96	Correct	7 ms	9728 KB	Output is correct
97	Correct	7 ms	9728 KB	Output is correct
98	Correct	7 ms	9728 KB	Output is correct
99	Correct	7 ms	9856 KB	Output is correct
100	Correct	7 ms	9856 KB	Output is correct
101	Correct	13 ms	10880 KB	Output is correct
102	Correct	13 ms	10496 KB	Output is correct
103	Correct	107 ms	20464 KB	Output is correct
104	Correct	101 ms	20460 KB	Output is correct
105	Correct	101 ms	17772 KB	Output is correct
106	Correct	87 ms	20460 KB	Output is correct
107	Correct	77 ms	15852 KB	Output is correct
108	Correct	84 ms	16316 KB	Output is correct
109	Correct	53 ms	15468 KB	Output is correct
110	Correct	49 ms	14956 KB	Output is correct
111	Correct	85 ms	19732 KB	Output is correct
112	Correct	104 ms	19200 KB	Output is correct
113	Correct	73 ms	15852 KB	Output is correct
114	Correct	87 ms	20460 KB	Output is correct
115	Correct	90 ms	20460 KB	Output is correct