#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int n;
const int N = 200005;
int tree[4 * N];
void ins(int num, int i, int a, int b, int node)
{
if (a == b)
{
tree[node] = num;
return;
}
int mid = (a + b) / 2;
if (i <= mid) ins(num, i, a, mid, node * 2);
if (i > mid) ins(num,i ,mid + 1, b, node * 2 + 1);
tree[node] = tree[node * 2] + tree[node * 2 + 1];
}
int getSum(int from, int to, int a, int b, int node)
{
if (from <= a && b <= to) return tree[node];
int mid = (a + b) / 2;
int res = 0;
if (from <= mid) res += getSum(from, to, a, mid, node * 2);
if (to > mid) res += getSum(from, to, mid + 1, b, node * 2+ 1);
return res;
}
long long count_swaps(std::vector<int> s) {
n = s.size() / 2;
vector<vector<int>> isAt(n + 1);
for (int i = 0; i < s.size(); i++)
{
if (s[i] < 0) isAt[abs(s[i])].push_back(i);
}
vector<int> match(s.size());
for (int i = s.size() - 1; i >= 0; i--)
{
if (s[i] > 0)
{
match[i] = isAt[s[i]].back();
match[isAt[s[i]].back()] = i;
isAt[s[i]].pop_back();
}
}
ll res = 0;
for (int i = 0; i < 2 * n; i++) ins(1, i, 0, N - 1, 1);
for (int i = 0; i < 2 * n; i++)
{
if (match[i] > i)
{
if (s[i] > 0)
{
res++;
}
res += getSum(i + 1, match[i] - 1, 0, N - 1, 1);
ins(0, i, 0, N - 1, 1);
ins(0, match[i], 0, N - 1, 1);
}
}
return res;
}
/*
5
1 2 -2 2 -2 -1 3 2 -3 -2
*/
Compilation message
shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:43:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
43 | for (int i = 0; i < s.size(); i++)
| ~~^~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
332 KB |
Output is correct |
2 |
Correct |
1 ms |
332 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
332 KB |
Output is correct |
2 |
Correct |
1 ms |
332 KB |
Output is correct |
3 |
Correct |
1 ms |
332 KB |
Output is correct |
4 |
Correct |
1 ms |
332 KB |
Output is correct |
5 |
Correct |
1 ms |
332 KB |
Output is correct |
6 |
Correct |
1 ms |
332 KB |
Output is correct |
7 |
Correct |
1 ms |
332 KB |
Output is correct |
8 |
Correct |
1 ms |
332 KB |
Output is correct |
9 |
Correct |
1 ms |
332 KB |
Output is correct |
10 |
Correct |
1 ms |
332 KB |
Output is correct |
11 |
Correct |
1 ms |
332 KB |
Output is correct |
12 |
Correct |
1 ms |
332 KB |
Output is correct |
13 |
Correct |
1 ms |
216 KB |
Output is correct |
14 |
Correct |
1 ms |
332 KB |
Output is correct |
15 |
Correct |
1 ms |
332 KB |
Output is correct |
16 |
Correct |
1 ms |
332 KB |
Output is correct |
17 |
Correct |
1 ms |
332 KB |
Output is correct |
18 |
Correct |
1 ms |
332 KB |
Output is correct |
19 |
Correct |
1 ms |
332 KB |
Output is correct |
20 |
Correct |
1 ms |
332 KB |
Output is correct |
21 |
Correct |
1 ms |
332 KB |
Output is correct |
22 |
Correct |
1 ms |
332 KB |
Output is correct |
23 |
Correct |
1 ms |
348 KB |
Output is correct |
24 |
Correct |
1 ms |
332 KB |
Output is correct |
25 |
Correct |
1 ms |
332 KB |
Output is correct |
26 |
Correct |
1 ms |
332 KB |
Output is correct |
27 |
Correct |
1 ms |
332 KB |
Output is correct |
28 |
Correct |
1 ms |
332 KB |
Output is correct |
29 |
Correct |
1 ms |
332 KB |
Output is correct |
30 |
Correct |
1 ms |
332 KB |
Output is correct |
31 |
Correct |
1 ms |
332 KB |
Output is correct |
32 |
Correct |
1 ms |
332 KB |
Output is correct |
33 |
Correct |
1 ms |
332 KB |
Output is correct |
34 |
Correct |
1 ms |
332 KB |
Output is correct |
35 |
Correct |
1 ms |
332 KB |
Output is correct |
36 |
Correct |
1 ms |
332 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
332 KB |
Output is correct |
2 |
Correct |
1 ms |
332 KB |
Output is correct |
3 |
Correct |
1 ms |
332 KB |
Output is correct |
4 |
Correct |
1 ms |
332 KB |
Output is correct |
5 |
Correct |
1 ms |
332 KB |
Output is correct |
6 |
Correct |
1 ms |
332 KB |
Output is correct |
7 |
Correct |
1 ms |
332 KB |
Output is correct |
8 |
Correct |
1 ms |
332 KB |
Output is correct |
9 |
Correct |
1 ms |
332 KB |
Output is correct |
10 |
Correct |
1 ms |
332 KB |
Output is correct |
11 |
Correct |
1 ms |
332 KB |
Output is correct |
12 |
Correct |
2 ms |
332 KB |
Output is correct |
13 |
Correct |
1 ms |
332 KB |
Output is correct |
14 |
Correct |
1 ms |
332 KB |
Output is correct |
15 |
Correct |
1 ms |
332 KB |
Output is correct |
16 |
Correct |
1 ms |
332 KB |
Output is correct |
17 |
Correct |
1 ms |
332 KB |
Output is correct |
18 |
Correct |
2 ms |
332 KB |
Output is correct |
19 |
Correct |
2 ms |
332 KB |
Output is correct |
20 |
Correct |
12 ms |
1228 KB |
Output is correct |
21 |
Correct |
12 ms |
1216 KB |
Output is correct |
22 |
Correct |
113 ms |
8836 KB |
Output is correct |
23 |
Correct |
101 ms |
8836 KB |
Output is correct |
24 |
Correct |
108 ms |
8832 KB |
Output is correct |
25 |
Correct |
110 ms |
8612 KB |
Output is correct |
26 |
Correct |
112 ms |
8836 KB |
Output is correct |
27 |
Correct |
104 ms |
8636 KB |
Output is correct |
28 |
Correct |
111 ms |
8732 KB |
Output is correct |
29 |
Correct |
112 ms |
8740 KB |
Output is correct |
30 |
Correct |
118 ms |
8736 KB |
Output is correct |
31 |
Correct |
116 ms |
8836 KB |
Output is correct |
32 |
Correct |
120 ms |
8840 KB |
Output is correct |
33 |
Correct |
112 ms |
8612 KB |
Output is correct |
34 |
Correct |
115 ms |
8840 KB |
Output is correct |
35 |
Correct |
1 ms |
332 KB |
Output is correct |
36 |
Correct |
1 ms |
300 KB |
Output is correct |
37 |
Correct |
111 ms |
8740 KB |
Output is correct |
38 |
Correct |
110 ms |
8752 KB |
Output is correct |
39 |
Correct |
110 ms |
8828 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
332 KB |
Output is correct |
2 |
Correct |
1 ms |
332 KB |
Output is correct |
3 |
Correct |
1 ms |
332 KB |
Output is correct |
4 |
Correct |
1 ms |
332 KB |
Output is correct |
5 |
Correct |
128 ms |
11304 KB |
Output is correct |
6 |
Correct |
119 ms |
8952 KB |
Output is correct |
7 |
Correct |
133 ms |
11420 KB |
Output is correct |
8 |
Correct |
111 ms |
8840 KB |
Output is correct |
9 |
Correct |
130 ms |
11424 KB |
Output is correct |
10 |
Correct |
130 ms |
9972 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
332 KB |
Output is correct |
2 |
Correct |
1 ms |
332 KB |
Output is correct |
3 |
Correct |
1 ms |
332 KB |
Output is correct |
4 |
Correct |
1 ms |
332 KB |
Output is correct |
5 |
Correct |
1 ms |
332 KB |
Output is correct |
6 |
Correct |
1 ms |
332 KB |
Output is correct |
7 |
Correct |
1 ms |
332 KB |
Output is correct |
8 |
Correct |
1 ms |
332 KB |
Output is correct |
9 |
Correct |
1 ms |
332 KB |
Output is correct |
10 |
Correct |
1 ms |
332 KB |
Output is correct |
11 |
Correct |
1 ms |
332 KB |
Output is correct |
12 |
Correct |
1 ms |
332 KB |
Output is correct |
13 |
Correct |
1 ms |
216 KB |
Output is correct |
14 |
Correct |
1 ms |
332 KB |
Output is correct |
15 |
Correct |
1 ms |
332 KB |
Output is correct |
16 |
Correct |
1 ms |
332 KB |
Output is correct |
17 |
Correct |
1 ms |
332 KB |
Output is correct |
18 |
Correct |
1 ms |
332 KB |
Output is correct |
19 |
Correct |
1 ms |
332 KB |
Output is correct |
20 |
Correct |
1 ms |
332 KB |
Output is correct |
21 |
Correct |
1 ms |
332 KB |
Output is correct |
22 |
Correct |
1 ms |
332 KB |
Output is correct |
23 |
Correct |
1 ms |
348 KB |
Output is correct |
24 |
Correct |
1 ms |
332 KB |
Output is correct |
25 |
Correct |
1 ms |
332 KB |
Output is correct |
26 |
Correct |
1 ms |
332 KB |
Output is correct |
27 |
Correct |
1 ms |
332 KB |
Output is correct |
28 |
Correct |
1 ms |
332 KB |
Output is correct |
29 |
Correct |
1 ms |
332 KB |
Output is correct |
30 |
Correct |
1 ms |
332 KB |
Output is correct |
31 |
Correct |
1 ms |
332 KB |
Output is correct |
32 |
Correct |
1 ms |
332 KB |
Output is correct |
33 |
Correct |
1 ms |
332 KB |
Output is correct |
34 |
Correct |
1 ms |
332 KB |
Output is correct |
35 |
Correct |
1 ms |
332 KB |
Output is correct |
36 |
Correct |
1 ms |
332 KB |
Output is correct |
37 |
Correct |
1 ms |
332 KB |
Output is correct |
38 |
Correct |
1 ms |
332 KB |
Output is correct |
39 |
Correct |
1 ms |
332 KB |
Output is correct |
40 |
Correct |
1 ms |
332 KB |
Output is correct |
41 |
Correct |
2 ms |
332 KB |
Output is correct |
42 |
Correct |
2 ms |
332 KB |
Output is correct |
43 |
Correct |
2 ms |
332 KB |
Output is correct |
44 |
Correct |
2 ms |
332 KB |
Output is correct |
45 |
Correct |
2 ms |
332 KB |
Output is correct |
46 |
Correct |
2 ms |
332 KB |
Output is correct |
47 |
Correct |
2 ms |
332 KB |
Output is correct |
48 |
Correct |
2 ms |
332 KB |
Output is correct |
49 |
Correct |
2 ms |
332 KB |
Output is correct |
50 |
Correct |
2 ms |
332 KB |
Output is correct |
51 |
Correct |
2 ms |
332 KB |
Output is correct |
52 |
Correct |
2 ms |
332 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
332 KB |
Output is correct |
2 |
Correct |
1 ms |
332 KB |
Output is correct |
3 |
Correct |
1 ms |
332 KB |
Output is correct |
4 |
Correct |
1 ms |
332 KB |
Output is correct |
5 |
Correct |
1 ms |
332 KB |
Output is correct |
6 |
Correct |
1 ms |
332 KB |
Output is correct |
7 |
Correct |
1 ms |
332 KB |
Output is correct |
8 |
Correct |
1 ms |
332 KB |
Output is correct |
9 |
Correct |
1 ms |
332 KB |
Output is correct |
10 |
Correct |
1 ms |
332 KB |
Output is correct |
11 |
Correct |
1 ms |
332 KB |
Output is correct |
12 |
Correct |
1 ms |
332 KB |
Output is correct |
13 |
Correct |
1 ms |
216 KB |
Output is correct |
14 |
Correct |
1 ms |
332 KB |
Output is correct |
15 |
Correct |
1 ms |
332 KB |
Output is correct |
16 |
Correct |
1 ms |
332 KB |
Output is correct |
17 |
Correct |
1 ms |
332 KB |
Output is correct |
18 |
Correct |
1 ms |
332 KB |
Output is correct |
19 |
Correct |
1 ms |
332 KB |
Output is correct |
20 |
Correct |
1 ms |
332 KB |
Output is correct |
21 |
Correct |
1 ms |
332 KB |
Output is correct |
22 |
Correct |
1 ms |
332 KB |
Output is correct |
23 |
Correct |
1 ms |
348 KB |
Output is correct |
24 |
Correct |
1 ms |
332 KB |
Output is correct |
25 |
Correct |
1 ms |
332 KB |
Output is correct |
26 |
Correct |
1 ms |
332 KB |
Output is correct |
27 |
Correct |
1 ms |
332 KB |
Output is correct |
28 |
Correct |
1 ms |
332 KB |
Output is correct |
29 |
Correct |
1 ms |
332 KB |
Output is correct |
30 |
Correct |
1 ms |
332 KB |
Output is correct |
31 |
Correct |
1 ms |
332 KB |
Output is correct |
32 |
Correct |
1 ms |
332 KB |
Output is correct |
33 |
Correct |
1 ms |
332 KB |
Output is correct |
34 |
Correct |
1 ms |
332 KB |
Output is correct |
35 |
Correct |
1 ms |
332 KB |
Output is correct |
36 |
Correct |
1 ms |
332 KB |
Output is correct |
37 |
Correct |
1 ms |
332 KB |
Output is correct |
38 |
Correct |
1 ms |
332 KB |
Output is correct |
39 |
Correct |
1 ms |
332 KB |
Output is correct |
40 |
Correct |
1 ms |
332 KB |
Output is correct |
41 |
Correct |
1 ms |
332 KB |
Output is correct |
42 |
Correct |
1 ms |
332 KB |
Output is correct |
43 |
Correct |
1 ms |
332 KB |
Output is correct |
44 |
Correct |
1 ms |
332 KB |
Output is correct |
45 |
Correct |
1 ms |
332 KB |
Output is correct |
46 |
Correct |
2 ms |
332 KB |
Output is correct |
47 |
Correct |
1 ms |
332 KB |
Output is correct |
48 |
Correct |
1 ms |
332 KB |
Output is correct |
49 |
Correct |
1 ms |
332 KB |
Output is correct |
50 |
Correct |
1 ms |
332 KB |
Output is correct |
51 |
Correct |
1 ms |
332 KB |
Output is correct |
52 |
Correct |
2 ms |
332 KB |
Output is correct |
53 |
Correct |
2 ms |
332 KB |
Output is correct |
54 |
Correct |
12 ms |
1228 KB |
Output is correct |
55 |
Correct |
12 ms |
1216 KB |
Output is correct |
56 |
Correct |
113 ms |
8836 KB |
Output is correct |
57 |
Correct |
101 ms |
8836 KB |
Output is correct |
58 |
Correct |
108 ms |
8832 KB |
Output is correct |
59 |
Correct |
110 ms |
8612 KB |
Output is correct |
60 |
Correct |
112 ms |
8836 KB |
Output is correct |
61 |
Correct |
104 ms |
8636 KB |
Output is correct |
62 |
Correct |
111 ms |
8732 KB |
Output is correct |
63 |
Correct |
112 ms |
8740 KB |
Output is correct |
64 |
Correct |
118 ms |
8736 KB |
Output is correct |
65 |
Correct |
116 ms |
8836 KB |
Output is correct |
66 |
Correct |
120 ms |
8840 KB |
Output is correct |
67 |
Correct |
112 ms |
8612 KB |
Output is correct |
68 |
Correct |
115 ms |
8840 KB |
Output is correct |
69 |
Correct |
1 ms |
332 KB |
Output is correct |
70 |
Correct |
1 ms |
300 KB |
Output is correct |
71 |
Correct |
111 ms |
8740 KB |
Output is correct |
72 |
Correct |
110 ms |
8752 KB |
Output is correct |
73 |
Correct |
110 ms |
8828 KB |
Output is correct |
74 |
Correct |
1 ms |
332 KB |
Output is correct |
75 |
Correct |
1 ms |
332 KB |
Output is correct |
76 |
Correct |
1 ms |
332 KB |
Output is correct |
77 |
Correct |
1 ms |
332 KB |
Output is correct |
78 |
Correct |
128 ms |
11304 KB |
Output is correct |
79 |
Correct |
119 ms |
8952 KB |
Output is correct |
80 |
Correct |
133 ms |
11420 KB |
Output is correct |
81 |
Correct |
111 ms |
8840 KB |
Output is correct |
82 |
Correct |
130 ms |
11424 KB |
Output is correct |
83 |
Correct |
130 ms |
9972 KB |
Output is correct |
84 |
Correct |
1 ms |
332 KB |
Output is correct |
85 |
Correct |
1 ms |
332 KB |
Output is correct |
86 |
Correct |
1 ms |
332 KB |
Output is correct |
87 |
Correct |
1 ms |
332 KB |
Output is correct |
88 |
Correct |
2 ms |
332 KB |
Output is correct |
89 |
Correct |
2 ms |
332 KB |
Output is correct |
90 |
Correct |
2 ms |
332 KB |
Output is correct |
91 |
Correct |
2 ms |
332 KB |
Output is correct |
92 |
Correct |
2 ms |
332 KB |
Output is correct |
93 |
Correct |
2 ms |
332 KB |
Output is correct |
94 |
Correct |
2 ms |
332 KB |
Output is correct |
95 |
Correct |
2 ms |
332 KB |
Output is correct |
96 |
Correct |
2 ms |
332 KB |
Output is correct |
97 |
Correct |
2 ms |
332 KB |
Output is correct |
98 |
Correct |
2 ms |
332 KB |
Output is correct |
99 |
Correct |
2 ms |
332 KB |
Output is correct |
100 |
Correct |
3 ms |
436 KB |
Output is correct |
101 |
Correct |
18 ms |
1328 KB |
Output is correct |
102 |
Correct |
16 ms |
1100 KB |
Output is correct |
103 |
Correct |
152 ms |
11352 KB |
Output is correct |
104 |
Correct |
119 ms |
11324 KB |
Output is correct |
105 |
Correct |
140 ms |
10020 KB |
Output is correct |
106 |
Correct |
132 ms |
11300 KB |
Output is correct |
107 |
Correct |
117 ms |
9100 KB |
Output is correct |
108 |
Correct |
114 ms |
9288 KB |
Output is correct |
109 |
Correct |
114 ms |
8724 KB |
Output is correct |
110 |
Correct |
112 ms |
8740 KB |
Output is correct |
111 |
Correct |
134 ms |
11072 KB |
Output is correct |
112 |
Correct |
149 ms |
10692 KB |
Output is correct |
113 |
Correct |
132 ms |
9004 KB |
Output is correct |
114 |
Correct |
127 ms |
11316 KB |
Output is correct |
115 |
Correct |
126 ms |
11400 KB |
Output is correct |