#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
const long long N = 2e5 + 5;
long long BIT[N];
bool cmp(pair<long long, long long> a, pair<long long, long long> b) {
return (a.second - a.first) < (b.second - b.first);
}
void Update(long long idx, long long val) {
for(long long i = idx; i < N; i += (i & (-i))) {
BIT[i] += val;
}
}
long long Query(long long x) {
long long ans = 0;
for(long long i = x; i > 0; i -= (i & (-i))) {
ans += BIT[i];
}
return ans;
}
long long count_swaps(vector<int> input) {
long long n = input.size();
vector<pair<long long, long long> > pair_of_shoes;
vector<long long> pos(n + 1), idx[n + 1];
for(long long i = 0; i <= n; i++) {
pos[i] = 0;
}
for(long long i = 0; i < n; i++) {
if(input[i] > 0) {
input[i] += n / 2;
}
else {
input[i] = abs(input[i]);
}
//cout << "input[i] = " << input[i] << "\n";
idx[input[i]].push_back(i);
if(input[i] > n / 2) {
if(pos[input[i] - n / 2] != idx[input[i] - n / 2].size()) {
long long pos1 = idx[input[i] - n / 2][pos[input[i] - n / 2]], pos2 = idx[input[i]][pos[input[i]]];
pair_of_shoes.push_back(make_pair(idx[input[i] - n / 2][pos[input[i] - n / 2]], idx[input[i]][pos[input[i]]]));
pos[input[i] - n / 2]++;
pos[input[i]]++;
//cout << "pos1 = " << pos1 << ", pos2 = " << pos2 << " hi\n";
}
}
if(input[i] <= n / 2) {
if(pos[input[i] + n / 2] != idx[input[i] + n / 2].size()) {
long long pos1 = idx[input[i] + n / 2][pos[input[i] + n / 2]], pos2 = idx[input[i]][pos[input[i]]];
pair_of_shoes.push_back(make_pair(idx[input[i] + n / 2][pos[input[i] + n / 2]], idx[input[i]][pos[input[i]]]));
pos[input[i] + n / 2]++;
pos[input[i]]++;
//cout << "pos1 = " << pos1 << ", pos2 = " << pos2 << " omg\n";
}
}
}
long long ans = 0, res = 0;
sort(pair_of_shoes.begin(), pair_of_shoes.end(), cmp);
for(long long i = 0; i < pair_of_shoes.size(); i++) {
ans += pair_of_shoes[i].second - pair_of_shoes[i].first - 1;
if(input[pair_of_shoes[i].first] > input[pair_of_shoes[i].second]) {
ans++;
}
pair_of_shoes[i].first++;
pair_of_shoes[i].second++;
//cout << pair_of_shoes[i].first << " " << pair_of_shoes[i].second << "\n";
if(pair_of_shoes[i].first != pair_of_shoes[i].second - 1) {
Update(pair_of_shoes[i].first + 1, 1);
Update(pair_of_shoes[i].second, -1);
long long temp = Query(pair_of_shoes[i].first); //whoever started before pair_of_shoes[i].first
long long ok = Query(pair_of_shoes[i].second); //whoever started in the middle (also contains the ones which started before pair_of_shoes[i].first)
res += ok + temp;
//cout << "ok = " << ok << ", temp = " << temp << "\n";
}
}
/*long long res = 0;
for(long long i = 0; i < pair_of_shoes.size(); i++) {
res += Query(1LL, pair_of_shoes[i].first) + Query(pair_of_shoes[i].first, pair_of_shoes[i].second) - Query;
}
res /= 2;*/
return ans - res;
}
Compilation message
shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:43:29: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
43 | if(pos[input[i] - n / 2] != idx[input[i] - n / 2].size()) {
shoes.cpp:44:15: warning: unused variable 'pos1' [-Wunused-variable]
44 | long long pos1 = idx[input[i] - n / 2][pos[input[i] - n / 2]], pos2 = idx[input[i]][pos[input[i]]];
| ^~~~
shoes.cpp:44:68: warning: unused variable 'pos2' [-Wunused-variable]
44 | long long pos1 = idx[input[i] - n / 2][pos[input[i] - n / 2]], pos2 = idx[input[i]][pos[input[i]]];
| ^~~~
shoes.cpp:52:29: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
52 | if(pos[input[i] + n / 2] != idx[input[i] + n / 2].size()) {
shoes.cpp:53:15: warning: unused variable 'pos1' [-Wunused-variable]
53 | long long pos1 = idx[input[i] + n / 2][pos[input[i] + n / 2]], pos2 = idx[input[i]][pos[input[i]]];
| ^~~~
shoes.cpp:53:68: warning: unused variable 'pos2' [-Wunused-variable]
53 | long long pos1 = idx[input[i] + n / 2][pos[input[i] + n / 2]], pos2 = idx[input[i]][pos[input[i]]];
| ^~~~
shoes.cpp:63:25: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
63 | for(long long i = 0; i < pair_of_shoes.size(); i++) {
| ~~^~~~~~~~~~~~~~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
204 KB |
Output is correct |
2 |
Correct |
0 ms |
204 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
204 KB |
Output is correct |
2 |
Correct |
0 ms |
204 KB |
Output is correct |
3 |
Correct |
0 ms |
332 KB |
Output is correct |
4 |
Correct |
0 ms |
332 KB |
Output is correct |
5 |
Correct |
0 ms |
204 KB |
Output is correct |
6 |
Correct |
0 ms |
308 KB |
Output is correct |
7 |
Correct |
0 ms |
332 KB |
Output is correct |
8 |
Correct |
0 ms |
304 KB |
Output is correct |
9 |
Correct |
0 ms |
332 KB |
Output is correct |
10 |
Correct |
0 ms |
204 KB |
Output is correct |
11 |
Correct |
0 ms |
332 KB |
Output is correct |
12 |
Correct |
0 ms |
332 KB |
Output is correct |
13 |
Correct |
0 ms |
204 KB |
Output is correct |
14 |
Correct |
0 ms |
332 KB |
Output is correct |
15 |
Correct |
0 ms |
332 KB |
Output is correct |
16 |
Correct |
0 ms |
304 KB |
Output is correct |
17 |
Correct |
0 ms |
204 KB |
Output is correct |
18 |
Correct |
0 ms |
332 KB |
Output is correct |
19 |
Correct |
0 ms |
332 KB |
Output is correct |
20 |
Correct |
0 ms |
332 KB |
Output is correct |
21 |
Correct |
0 ms |
332 KB |
Output is correct |
22 |
Correct |
0 ms |
332 KB |
Output is correct |
23 |
Correct |
0 ms |
308 KB |
Output is correct |
24 |
Correct |
1 ms |
332 KB |
Output is correct |
25 |
Correct |
0 ms |
332 KB |
Output is correct |
26 |
Correct |
0 ms |
304 KB |
Output is correct |
27 |
Correct |
0 ms |
300 KB |
Output is correct |
28 |
Correct |
0 ms |
332 KB |
Output is correct |
29 |
Correct |
0 ms |
332 KB |
Output is correct |
30 |
Correct |
0 ms |
204 KB |
Output is correct |
31 |
Correct |
0 ms |
332 KB |
Output is correct |
32 |
Correct |
0 ms |
332 KB |
Output is correct |
33 |
Correct |
0 ms |
332 KB |
Output is correct |
34 |
Correct |
1 ms |
332 KB |
Output is correct |
35 |
Correct |
0 ms |
332 KB |
Output is correct |
36 |
Correct |
0 ms |
332 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
204 KB |
Output is correct |
2 |
Correct |
0 ms |
204 KB |
Output is correct |
3 |
Correct |
0 ms |
332 KB |
Output is correct |
4 |
Correct |
0 ms |
204 KB |
Output is correct |
5 |
Correct |
0 ms |
204 KB |
Output is correct |
6 |
Correct |
0 ms |
332 KB |
Output is correct |
7 |
Correct |
0 ms |
204 KB |
Output is correct |
8 |
Correct |
0 ms |
204 KB |
Output is correct |
9 |
Correct |
0 ms |
332 KB |
Output is correct |
10 |
Correct |
0 ms |
204 KB |
Output is correct |
11 |
Correct |
1 ms |
332 KB |
Output is correct |
12 |
Correct |
0 ms |
204 KB |
Output is correct |
13 |
Correct |
0 ms |
300 KB |
Output is correct |
14 |
Correct |
0 ms |
332 KB |
Output is correct |
15 |
Correct |
0 ms |
332 KB |
Output is correct |
16 |
Correct |
0 ms |
280 KB |
Output is correct |
17 |
Correct |
1 ms |
332 KB |
Output is correct |
18 |
Correct |
1 ms |
460 KB |
Output is correct |
19 |
Correct |
1 ms |
460 KB |
Output is correct |
20 |
Correct |
4 ms |
1900 KB |
Output is correct |
21 |
Correct |
4 ms |
1988 KB |
Output is correct |
22 |
Correct |
39 ms |
14228 KB |
Output is correct |
23 |
Correct |
31 ms |
12588 KB |
Output is correct |
24 |
Correct |
43 ms |
14344 KB |
Output is correct |
25 |
Correct |
35 ms |
14024 KB |
Output is correct |
26 |
Correct |
38 ms |
14220 KB |
Output is correct |
27 |
Correct |
30 ms |
12368 KB |
Output is correct |
28 |
Correct |
34 ms |
14164 KB |
Output is correct |
29 |
Correct |
35 ms |
14140 KB |
Output is correct |
30 |
Correct |
35 ms |
14176 KB |
Output is correct |
31 |
Correct |
38 ms |
14232 KB |
Output is correct |
32 |
Correct |
35 ms |
14180 KB |
Output is correct |
33 |
Correct |
34 ms |
14032 KB |
Output is correct |
34 |
Correct |
35 ms |
14144 KB |
Output is correct |
35 |
Correct |
0 ms |
204 KB |
Output is correct |
36 |
Correct |
0 ms |
332 KB |
Output is correct |
37 |
Correct |
34 ms |
14160 KB |
Output is correct |
38 |
Correct |
35 ms |
14164 KB |
Output is correct |
39 |
Correct |
35 ms |
14148 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
204 KB |
Output is correct |
2 |
Correct |
0 ms |
332 KB |
Output is correct |
3 |
Correct |
0 ms |
304 KB |
Output is correct |
4 |
Correct |
0 ms |
332 KB |
Output is correct |
5 |
Correct |
64 ms |
18688 KB |
Output is correct |
6 |
Correct |
45 ms |
14996 KB |
Output is correct |
7 |
Correct |
62 ms |
18708 KB |
Output is correct |
8 |
Correct |
33 ms |
14688 KB |
Output is correct |
9 |
Correct |
63 ms |
18716 KB |
Output is correct |
10 |
Correct |
61 ms |
16036 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
204 KB |
Output is correct |
2 |
Correct |
0 ms |
204 KB |
Output is correct |
3 |
Correct |
0 ms |
332 KB |
Output is correct |
4 |
Correct |
0 ms |
332 KB |
Output is correct |
5 |
Correct |
0 ms |
204 KB |
Output is correct |
6 |
Correct |
0 ms |
308 KB |
Output is correct |
7 |
Correct |
0 ms |
332 KB |
Output is correct |
8 |
Correct |
0 ms |
304 KB |
Output is correct |
9 |
Correct |
0 ms |
332 KB |
Output is correct |
10 |
Correct |
0 ms |
204 KB |
Output is correct |
11 |
Correct |
0 ms |
332 KB |
Output is correct |
12 |
Correct |
0 ms |
332 KB |
Output is correct |
13 |
Correct |
0 ms |
204 KB |
Output is correct |
14 |
Correct |
0 ms |
332 KB |
Output is correct |
15 |
Correct |
0 ms |
332 KB |
Output is correct |
16 |
Correct |
0 ms |
304 KB |
Output is correct |
17 |
Correct |
0 ms |
204 KB |
Output is correct |
18 |
Correct |
0 ms |
332 KB |
Output is correct |
19 |
Correct |
0 ms |
332 KB |
Output is correct |
20 |
Correct |
0 ms |
332 KB |
Output is correct |
21 |
Correct |
0 ms |
332 KB |
Output is correct |
22 |
Correct |
0 ms |
332 KB |
Output is correct |
23 |
Correct |
0 ms |
308 KB |
Output is correct |
24 |
Correct |
1 ms |
332 KB |
Output is correct |
25 |
Correct |
0 ms |
332 KB |
Output is correct |
26 |
Correct |
0 ms |
304 KB |
Output is correct |
27 |
Correct |
0 ms |
300 KB |
Output is correct |
28 |
Correct |
0 ms |
332 KB |
Output is correct |
29 |
Correct |
0 ms |
332 KB |
Output is correct |
30 |
Correct |
0 ms |
204 KB |
Output is correct |
31 |
Correct |
0 ms |
332 KB |
Output is correct |
32 |
Correct |
0 ms |
332 KB |
Output is correct |
33 |
Correct |
0 ms |
332 KB |
Output is correct |
34 |
Correct |
1 ms |
332 KB |
Output is correct |
35 |
Correct |
0 ms |
332 KB |
Output is correct |
36 |
Correct |
0 ms |
332 KB |
Output is correct |
37 |
Correct |
0 ms |
332 KB |
Output is correct |
38 |
Correct |
0 ms |
308 KB |
Output is correct |
39 |
Correct |
0 ms |
304 KB |
Output is correct |
40 |
Correct |
1 ms |
332 KB |
Output is correct |
41 |
Correct |
1 ms |
440 KB |
Output is correct |
42 |
Correct |
1 ms |
460 KB |
Output is correct |
43 |
Correct |
1 ms |
460 KB |
Output is correct |
44 |
Correct |
1 ms |
460 KB |
Output is correct |
45 |
Correct |
1 ms |
460 KB |
Output is correct |
46 |
Correct |
1 ms |
332 KB |
Output is correct |
47 |
Correct |
1 ms |
460 KB |
Output is correct |
48 |
Correct |
1 ms |
460 KB |
Output is correct |
49 |
Correct |
1 ms |
460 KB |
Output is correct |
50 |
Correct |
1 ms |
460 KB |
Output is correct |
51 |
Correct |
1 ms |
460 KB |
Output is correct |
52 |
Correct |
1 ms |
460 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
204 KB |
Output is correct |
2 |
Correct |
0 ms |
204 KB |
Output is correct |
3 |
Correct |
0 ms |
332 KB |
Output is correct |
4 |
Correct |
0 ms |
332 KB |
Output is correct |
5 |
Correct |
0 ms |
204 KB |
Output is correct |
6 |
Correct |
0 ms |
308 KB |
Output is correct |
7 |
Correct |
0 ms |
332 KB |
Output is correct |
8 |
Correct |
0 ms |
304 KB |
Output is correct |
9 |
Correct |
0 ms |
332 KB |
Output is correct |
10 |
Correct |
0 ms |
204 KB |
Output is correct |
11 |
Correct |
0 ms |
332 KB |
Output is correct |
12 |
Correct |
0 ms |
332 KB |
Output is correct |
13 |
Correct |
0 ms |
204 KB |
Output is correct |
14 |
Correct |
0 ms |
332 KB |
Output is correct |
15 |
Correct |
0 ms |
332 KB |
Output is correct |
16 |
Correct |
0 ms |
304 KB |
Output is correct |
17 |
Correct |
0 ms |
204 KB |
Output is correct |
18 |
Correct |
0 ms |
332 KB |
Output is correct |
19 |
Correct |
0 ms |
332 KB |
Output is correct |
20 |
Correct |
0 ms |
332 KB |
Output is correct |
21 |
Correct |
0 ms |
332 KB |
Output is correct |
22 |
Correct |
0 ms |
332 KB |
Output is correct |
23 |
Correct |
0 ms |
308 KB |
Output is correct |
24 |
Correct |
1 ms |
332 KB |
Output is correct |
25 |
Correct |
0 ms |
332 KB |
Output is correct |
26 |
Correct |
0 ms |
304 KB |
Output is correct |
27 |
Correct |
0 ms |
300 KB |
Output is correct |
28 |
Correct |
0 ms |
332 KB |
Output is correct |
29 |
Correct |
0 ms |
332 KB |
Output is correct |
30 |
Correct |
0 ms |
204 KB |
Output is correct |
31 |
Correct |
0 ms |
332 KB |
Output is correct |
32 |
Correct |
0 ms |
332 KB |
Output is correct |
33 |
Correct |
0 ms |
332 KB |
Output is correct |
34 |
Correct |
1 ms |
332 KB |
Output is correct |
35 |
Correct |
0 ms |
332 KB |
Output is correct |
36 |
Correct |
0 ms |
332 KB |
Output is correct |
37 |
Correct |
0 ms |
332 KB |
Output is correct |
38 |
Correct |
0 ms |
204 KB |
Output is correct |
39 |
Correct |
0 ms |
204 KB |
Output is correct |
40 |
Correct |
0 ms |
332 KB |
Output is correct |
41 |
Correct |
0 ms |
204 KB |
Output is correct |
42 |
Correct |
0 ms |
204 KB |
Output is correct |
43 |
Correct |
0 ms |
332 KB |
Output is correct |
44 |
Correct |
0 ms |
204 KB |
Output is correct |
45 |
Correct |
1 ms |
332 KB |
Output is correct |
46 |
Correct |
0 ms |
204 KB |
Output is correct |
47 |
Correct |
0 ms |
300 KB |
Output is correct |
48 |
Correct |
0 ms |
332 KB |
Output is correct |
49 |
Correct |
0 ms |
332 KB |
Output is correct |
50 |
Correct |
0 ms |
280 KB |
Output is correct |
51 |
Correct |
1 ms |
332 KB |
Output is correct |
52 |
Correct |
1 ms |
460 KB |
Output is correct |
53 |
Correct |
1 ms |
460 KB |
Output is correct |
54 |
Correct |
4 ms |
1900 KB |
Output is correct |
55 |
Correct |
4 ms |
1988 KB |
Output is correct |
56 |
Correct |
39 ms |
14228 KB |
Output is correct |
57 |
Correct |
31 ms |
12588 KB |
Output is correct |
58 |
Correct |
43 ms |
14344 KB |
Output is correct |
59 |
Correct |
35 ms |
14024 KB |
Output is correct |
60 |
Correct |
38 ms |
14220 KB |
Output is correct |
61 |
Correct |
30 ms |
12368 KB |
Output is correct |
62 |
Correct |
34 ms |
14164 KB |
Output is correct |
63 |
Correct |
35 ms |
14140 KB |
Output is correct |
64 |
Correct |
35 ms |
14176 KB |
Output is correct |
65 |
Correct |
38 ms |
14232 KB |
Output is correct |
66 |
Correct |
35 ms |
14180 KB |
Output is correct |
67 |
Correct |
34 ms |
14032 KB |
Output is correct |
68 |
Correct |
35 ms |
14144 KB |
Output is correct |
69 |
Correct |
0 ms |
204 KB |
Output is correct |
70 |
Correct |
0 ms |
332 KB |
Output is correct |
71 |
Correct |
34 ms |
14160 KB |
Output is correct |
72 |
Correct |
35 ms |
14164 KB |
Output is correct |
73 |
Correct |
35 ms |
14148 KB |
Output is correct |
74 |
Correct |
0 ms |
204 KB |
Output is correct |
75 |
Correct |
0 ms |
332 KB |
Output is correct |
76 |
Correct |
0 ms |
304 KB |
Output is correct |
77 |
Correct |
0 ms |
332 KB |
Output is correct |
78 |
Correct |
64 ms |
18688 KB |
Output is correct |
79 |
Correct |
45 ms |
14996 KB |
Output is correct |
80 |
Correct |
62 ms |
18708 KB |
Output is correct |
81 |
Correct |
33 ms |
14688 KB |
Output is correct |
82 |
Correct |
63 ms |
18716 KB |
Output is correct |
83 |
Correct |
61 ms |
16036 KB |
Output is correct |
84 |
Correct |
0 ms |
332 KB |
Output is correct |
85 |
Correct |
0 ms |
308 KB |
Output is correct |
86 |
Correct |
0 ms |
304 KB |
Output is correct |
87 |
Correct |
1 ms |
332 KB |
Output is correct |
88 |
Correct |
1 ms |
440 KB |
Output is correct |
89 |
Correct |
1 ms |
460 KB |
Output is correct |
90 |
Correct |
1 ms |
460 KB |
Output is correct |
91 |
Correct |
1 ms |
460 KB |
Output is correct |
92 |
Correct |
1 ms |
460 KB |
Output is correct |
93 |
Correct |
1 ms |
332 KB |
Output is correct |
94 |
Correct |
1 ms |
460 KB |
Output is correct |
95 |
Correct |
1 ms |
460 KB |
Output is correct |
96 |
Correct |
1 ms |
460 KB |
Output is correct |
97 |
Correct |
1 ms |
460 KB |
Output is correct |
98 |
Correct |
1 ms |
460 KB |
Output is correct |
99 |
Correct |
1 ms |
460 KB |
Output is correct |
100 |
Correct |
1 ms |
460 KB |
Output is correct |
101 |
Correct |
6 ms |
1992 KB |
Output is correct |
102 |
Correct |
5 ms |
1720 KB |
Output is correct |
103 |
Correct |
99 ms |
18736 KB |
Output is correct |
104 |
Correct |
61 ms |
17180 KB |
Output is correct |
105 |
Correct |
68 ms |
16340 KB |
Output is correct |
106 |
Correct |
61 ms |
18720 KB |
Output is correct |
107 |
Correct |
46 ms |
15168 KB |
Output is correct |
108 |
Correct |
45 ms |
13856 KB |
Output is correct |
109 |
Correct |
38 ms |
14868 KB |
Output is correct |
110 |
Correct |
40 ms |
14104 KB |
Output is correct |
111 |
Correct |
65 ms |
17944 KB |
Output is correct |
112 |
Correct |
99 ms |
17284 KB |
Output is correct |
113 |
Correct |
55 ms |
15012 KB |
Output is correct |
114 |
Correct |
64 ms |
18720 KB |
Output is correct |
115 |
Correct |
64 ms |
18744 KB |
Output is correct |