#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
struct segtree{
vector<int> t;
int sz;
void init(int n){
sz = 1;
while(sz < n)sz *= 2;
t.assign(sz*2, 1);
for(int i=sz-1; i>0; i--)t[i] = t[i*2] + t[i*2+1];
}
void add(int pos, int val){
pos += sz;
t[pos] += val;
for(;pos > 1; pos>>=1)t[pos>>1] = t[pos] + t[pos^1];
}
int query(int l, int r){
if(l > r)return 0;
l += sz, r += sz;
int sum = 0;
for(;l <= r; l>>=1, r>>=1){
if(l%2 == 1)sum += t[l], l++;
if(r%2 == 0)sum += t[r], r--;
}return sum;
}
};
long long count_swaps(vector<int> a) {
int n = a.size()/2;
long long ans = 0;
vector<vector<int>> pos(n+1);
vector<vector<int>> neg(n+1);
for(int i=0;i<n*2;i++){
if(a[i] > 0)
pos[a[i]].push_back(i);
else
neg[abs(a[i])].push_back(i);
}
for(int i=1;i<=n;i++){
sort(pos[i].begin(), pos[i].end());
sort(neg[i].begin(), neg[i].end());
}
vector<pair<int, int>> need;
for(int i=1;i<=n;i++){
for(int j=0;j<pos[i].size();j++){
int r = pos[i][j];
int l = neg[i][j];
if(l > r)swap(l, r),ans++;
need.push_back({l, r});
}
}
sort(need.begin(), need.end());
segtree seg;
seg.init(n*2);
for(auto X : need){
int l = X.first;
int r = X.second;
ans += (long long)seg.query(l+1, r-1);
// cout << l << ' ' << r << ';' << seg.query(l+1, r-1) << '\n';
seg.add(l, -1);
seg.add(r, -1);
}
//cout << "; ans = " << ans << '\n';
return ans;
}
/*
3
-2 -2 -2 2 2 2
3
-2 2 2 -2 -2 2
2
2 1 -1 -2
*/
Compilation message
shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:47:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
47 | for(int j=0;j<pos[i].size();j++){
| ~^~~~~~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
256 KB |
Output is correct |
2 |
Correct |
0 ms |
256 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
256 KB |
Output is correct |
2 |
Correct |
0 ms |
256 KB |
Output is correct |
3 |
Correct |
0 ms |
256 KB |
Output is correct |
4 |
Correct |
1 ms |
256 KB |
Output is correct |
5 |
Correct |
1 ms |
256 KB |
Output is correct |
6 |
Correct |
0 ms |
256 KB |
Output is correct |
7 |
Correct |
0 ms |
256 KB |
Output is correct |
8 |
Correct |
1 ms |
256 KB |
Output is correct |
9 |
Correct |
1 ms |
256 KB |
Output is correct |
10 |
Correct |
1 ms |
384 KB |
Output is correct |
11 |
Correct |
0 ms |
256 KB |
Output is correct |
12 |
Correct |
1 ms |
256 KB |
Output is correct |
13 |
Correct |
0 ms |
256 KB |
Output is correct |
14 |
Correct |
1 ms |
256 KB |
Output is correct |
15 |
Correct |
1 ms |
256 KB |
Output is correct |
16 |
Correct |
1 ms |
256 KB |
Output is correct |
17 |
Correct |
0 ms |
256 KB |
Output is correct |
18 |
Correct |
1 ms |
256 KB |
Output is correct |
19 |
Correct |
1 ms |
256 KB |
Output is correct |
20 |
Correct |
0 ms |
256 KB |
Output is correct |
21 |
Correct |
1 ms |
288 KB |
Output is correct |
22 |
Correct |
1 ms |
256 KB |
Output is correct |
23 |
Correct |
0 ms |
256 KB |
Output is correct |
24 |
Correct |
0 ms |
256 KB |
Output is correct |
25 |
Correct |
1 ms |
256 KB |
Output is correct |
26 |
Correct |
1 ms |
256 KB |
Output is correct |
27 |
Correct |
0 ms |
256 KB |
Output is correct |
28 |
Correct |
1 ms |
256 KB |
Output is correct |
29 |
Correct |
0 ms |
256 KB |
Output is correct |
30 |
Correct |
1 ms |
256 KB |
Output is correct |
31 |
Correct |
0 ms |
256 KB |
Output is correct |
32 |
Correct |
0 ms |
256 KB |
Output is correct |
33 |
Correct |
1 ms |
256 KB |
Output is correct |
34 |
Correct |
0 ms |
256 KB |
Output is correct |
35 |
Correct |
1 ms |
256 KB |
Output is correct |
36 |
Correct |
1 ms |
256 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
256 KB |
Output is correct |
2 |
Correct |
0 ms |
256 KB |
Output is correct |
3 |
Correct |
0 ms |
256 KB |
Output is correct |
4 |
Correct |
1 ms |
256 KB |
Output is correct |
5 |
Correct |
0 ms |
256 KB |
Output is correct |
6 |
Correct |
1 ms |
256 KB |
Output is correct |
7 |
Correct |
0 ms |
256 KB |
Output is correct |
8 |
Correct |
1 ms |
256 KB |
Output is correct |
9 |
Correct |
1 ms |
256 KB |
Output is correct |
10 |
Correct |
0 ms |
256 KB |
Output is correct |
11 |
Correct |
1 ms |
256 KB |
Output is correct |
12 |
Correct |
0 ms |
256 KB |
Output is correct |
13 |
Correct |
0 ms |
256 KB |
Output is correct |
14 |
Correct |
1 ms |
256 KB |
Output is correct |
15 |
Correct |
1 ms |
256 KB |
Output is correct |
16 |
Correct |
1 ms |
256 KB |
Output is correct |
17 |
Correct |
1 ms |
384 KB |
Output is correct |
18 |
Correct |
1 ms |
384 KB |
Output is correct |
19 |
Correct |
1 ms |
384 KB |
Output is correct |
20 |
Correct |
6 ms |
1664 KB |
Output is correct |
21 |
Correct |
6 ms |
1664 KB |
Output is correct |
22 |
Correct |
56 ms |
11540 KB |
Output is correct |
23 |
Correct |
49 ms |
11624 KB |
Output is correct |
24 |
Correct |
54 ms |
11624 KB |
Output is correct |
25 |
Correct |
53 ms |
11372 KB |
Output is correct |
26 |
Correct |
59 ms |
11624 KB |
Output is correct |
27 |
Correct |
47 ms |
11368 KB |
Output is correct |
28 |
Correct |
56 ms |
11628 KB |
Output is correct |
29 |
Correct |
54 ms |
11628 KB |
Output is correct |
30 |
Correct |
53 ms |
11628 KB |
Output is correct |
31 |
Correct |
58 ms |
11904 KB |
Output is correct |
32 |
Correct |
54 ms |
11632 KB |
Output is correct |
33 |
Correct |
54 ms |
11372 KB |
Output is correct |
34 |
Correct |
54 ms |
11628 KB |
Output is correct |
35 |
Correct |
1 ms |
256 KB |
Output is correct |
36 |
Correct |
1 ms |
256 KB |
Output is correct |
37 |
Correct |
55 ms |
11628 KB |
Output is correct |
38 |
Correct |
54 ms |
11760 KB |
Output is correct |
39 |
Correct |
54 ms |
11628 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
256 KB |
Output is correct |
2 |
Correct |
0 ms |
256 KB |
Output is correct |
3 |
Correct |
1 ms |
256 KB |
Output is correct |
4 |
Correct |
0 ms |
256 KB |
Output is correct |
5 |
Correct |
111 ms |
15852 KB |
Output is correct |
6 |
Correct |
75 ms |
12268 KB |
Output is correct |
7 |
Correct |
102 ms |
17004 KB |
Output is correct |
8 |
Correct |
61 ms |
11764 KB |
Output is correct |
9 |
Correct |
102 ms |
17004 KB |
Output is correct |
10 |
Correct |
97 ms |
13932 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
256 KB |
Output is correct |
2 |
Correct |
0 ms |
256 KB |
Output is correct |
3 |
Correct |
0 ms |
256 KB |
Output is correct |
4 |
Correct |
1 ms |
256 KB |
Output is correct |
5 |
Correct |
1 ms |
256 KB |
Output is correct |
6 |
Correct |
0 ms |
256 KB |
Output is correct |
7 |
Correct |
0 ms |
256 KB |
Output is correct |
8 |
Correct |
1 ms |
256 KB |
Output is correct |
9 |
Correct |
1 ms |
256 KB |
Output is correct |
10 |
Correct |
1 ms |
384 KB |
Output is correct |
11 |
Correct |
0 ms |
256 KB |
Output is correct |
12 |
Correct |
1 ms |
256 KB |
Output is correct |
13 |
Correct |
0 ms |
256 KB |
Output is correct |
14 |
Correct |
1 ms |
256 KB |
Output is correct |
15 |
Correct |
1 ms |
256 KB |
Output is correct |
16 |
Correct |
1 ms |
256 KB |
Output is correct |
17 |
Correct |
0 ms |
256 KB |
Output is correct |
18 |
Correct |
1 ms |
256 KB |
Output is correct |
19 |
Correct |
1 ms |
256 KB |
Output is correct |
20 |
Correct |
0 ms |
256 KB |
Output is correct |
21 |
Correct |
1 ms |
288 KB |
Output is correct |
22 |
Correct |
1 ms |
256 KB |
Output is correct |
23 |
Correct |
0 ms |
256 KB |
Output is correct |
24 |
Correct |
0 ms |
256 KB |
Output is correct |
25 |
Correct |
1 ms |
256 KB |
Output is correct |
26 |
Correct |
1 ms |
256 KB |
Output is correct |
27 |
Correct |
0 ms |
256 KB |
Output is correct |
28 |
Correct |
1 ms |
256 KB |
Output is correct |
29 |
Correct |
0 ms |
256 KB |
Output is correct |
30 |
Correct |
1 ms |
256 KB |
Output is correct |
31 |
Correct |
0 ms |
256 KB |
Output is correct |
32 |
Correct |
0 ms |
256 KB |
Output is correct |
33 |
Correct |
1 ms |
256 KB |
Output is correct |
34 |
Correct |
0 ms |
256 KB |
Output is correct |
35 |
Correct |
1 ms |
256 KB |
Output is correct |
36 |
Correct |
1 ms |
256 KB |
Output is correct |
37 |
Correct |
0 ms |
256 KB |
Output is correct |
38 |
Correct |
1 ms |
256 KB |
Output is correct |
39 |
Correct |
1 ms |
384 KB |
Output is correct |
40 |
Correct |
1 ms |
384 KB |
Output is correct |
41 |
Correct |
1 ms |
512 KB |
Output is correct |
42 |
Correct |
1 ms |
512 KB |
Output is correct |
43 |
Correct |
1 ms |
512 KB |
Output is correct |
44 |
Correct |
1 ms |
512 KB |
Output is correct |
45 |
Correct |
1 ms |
384 KB |
Output is correct |
46 |
Correct |
1 ms |
384 KB |
Output is correct |
47 |
Correct |
1 ms |
384 KB |
Output is correct |
48 |
Correct |
1 ms |
384 KB |
Output is correct |
49 |
Correct |
1 ms |
384 KB |
Output is correct |
50 |
Correct |
1 ms |
384 KB |
Output is correct |
51 |
Correct |
1 ms |
384 KB |
Output is correct |
52 |
Correct |
1 ms |
512 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
256 KB |
Output is correct |
2 |
Correct |
0 ms |
256 KB |
Output is correct |
3 |
Correct |
0 ms |
256 KB |
Output is correct |
4 |
Correct |
1 ms |
256 KB |
Output is correct |
5 |
Correct |
1 ms |
256 KB |
Output is correct |
6 |
Correct |
0 ms |
256 KB |
Output is correct |
7 |
Correct |
0 ms |
256 KB |
Output is correct |
8 |
Correct |
1 ms |
256 KB |
Output is correct |
9 |
Correct |
1 ms |
256 KB |
Output is correct |
10 |
Correct |
1 ms |
384 KB |
Output is correct |
11 |
Correct |
0 ms |
256 KB |
Output is correct |
12 |
Correct |
1 ms |
256 KB |
Output is correct |
13 |
Correct |
0 ms |
256 KB |
Output is correct |
14 |
Correct |
1 ms |
256 KB |
Output is correct |
15 |
Correct |
1 ms |
256 KB |
Output is correct |
16 |
Correct |
1 ms |
256 KB |
Output is correct |
17 |
Correct |
0 ms |
256 KB |
Output is correct |
18 |
Correct |
1 ms |
256 KB |
Output is correct |
19 |
Correct |
1 ms |
256 KB |
Output is correct |
20 |
Correct |
0 ms |
256 KB |
Output is correct |
21 |
Correct |
1 ms |
288 KB |
Output is correct |
22 |
Correct |
1 ms |
256 KB |
Output is correct |
23 |
Correct |
0 ms |
256 KB |
Output is correct |
24 |
Correct |
0 ms |
256 KB |
Output is correct |
25 |
Correct |
1 ms |
256 KB |
Output is correct |
26 |
Correct |
1 ms |
256 KB |
Output is correct |
27 |
Correct |
0 ms |
256 KB |
Output is correct |
28 |
Correct |
1 ms |
256 KB |
Output is correct |
29 |
Correct |
0 ms |
256 KB |
Output is correct |
30 |
Correct |
1 ms |
256 KB |
Output is correct |
31 |
Correct |
0 ms |
256 KB |
Output is correct |
32 |
Correct |
0 ms |
256 KB |
Output is correct |
33 |
Correct |
1 ms |
256 KB |
Output is correct |
34 |
Correct |
0 ms |
256 KB |
Output is correct |
35 |
Correct |
1 ms |
256 KB |
Output is correct |
36 |
Correct |
1 ms |
256 KB |
Output is correct |
37 |
Correct |
0 ms |
256 KB |
Output is correct |
38 |
Correct |
1 ms |
256 KB |
Output is correct |
39 |
Correct |
0 ms |
256 KB |
Output is correct |
40 |
Correct |
1 ms |
256 KB |
Output is correct |
41 |
Correct |
0 ms |
256 KB |
Output is correct |
42 |
Correct |
1 ms |
256 KB |
Output is correct |
43 |
Correct |
1 ms |
256 KB |
Output is correct |
44 |
Correct |
0 ms |
256 KB |
Output is correct |
45 |
Correct |
1 ms |
256 KB |
Output is correct |
46 |
Correct |
0 ms |
256 KB |
Output is correct |
47 |
Correct |
0 ms |
256 KB |
Output is correct |
48 |
Correct |
1 ms |
256 KB |
Output is correct |
49 |
Correct |
1 ms |
256 KB |
Output is correct |
50 |
Correct |
1 ms |
256 KB |
Output is correct |
51 |
Correct |
1 ms |
384 KB |
Output is correct |
52 |
Correct |
1 ms |
384 KB |
Output is correct |
53 |
Correct |
1 ms |
384 KB |
Output is correct |
54 |
Correct |
6 ms |
1664 KB |
Output is correct |
55 |
Correct |
6 ms |
1664 KB |
Output is correct |
56 |
Correct |
56 ms |
11540 KB |
Output is correct |
57 |
Correct |
49 ms |
11624 KB |
Output is correct |
58 |
Correct |
54 ms |
11624 KB |
Output is correct |
59 |
Correct |
53 ms |
11372 KB |
Output is correct |
60 |
Correct |
59 ms |
11624 KB |
Output is correct |
61 |
Correct |
47 ms |
11368 KB |
Output is correct |
62 |
Correct |
56 ms |
11628 KB |
Output is correct |
63 |
Correct |
54 ms |
11628 KB |
Output is correct |
64 |
Correct |
53 ms |
11628 KB |
Output is correct |
65 |
Correct |
58 ms |
11904 KB |
Output is correct |
66 |
Correct |
54 ms |
11632 KB |
Output is correct |
67 |
Correct |
54 ms |
11372 KB |
Output is correct |
68 |
Correct |
54 ms |
11628 KB |
Output is correct |
69 |
Correct |
1 ms |
256 KB |
Output is correct |
70 |
Correct |
1 ms |
256 KB |
Output is correct |
71 |
Correct |
55 ms |
11628 KB |
Output is correct |
72 |
Correct |
54 ms |
11760 KB |
Output is correct |
73 |
Correct |
54 ms |
11628 KB |
Output is correct |
74 |
Correct |
0 ms |
256 KB |
Output is correct |
75 |
Correct |
0 ms |
256 KB |
Output is correct |
76 |
Correct |
1 ms |
256 KB |
Output is correct |
77 |
Correct |
0 ms |
256 KB |
Output is correct |
78 |
Correct |
111 ms |
15852 KB |
Output is correct |
79 |
Correct |
75 ms |
12268 KB |
Output is correct |
80 |
Correct |
102 ms |
17004 KB |
Output is correct |
81 |
Correct |
61 ms |
11764 KB |
Output is correct |
82 |
Correct |
102 ms |
17004 KB |
Output is correct |
83 |
Correct |
97 ms |
13932 KB |
Output is correct |
84 |
Correct |
0 ms |
256 KB |
Output is correct |
85 |
Correct |
1 ms |
256 KB |
Output is correct |
86 |
Correct |
1 ms |
384 KB |
Output is correct |
87 |
Correct |
1 ms |
384 KB |
Output is correct |
88 |
Correct |
1 ms |
512 KB |
Output is correct |
89 |
Correct |
1 ms |
512 KB |
Output is correct |
90 |
Correct |
1 ms |
512 KB |
Output is correct |
91 |
Correct |
1 ms |
512 KB |
Output is correct |
92 |
Correct |
1 ms |
384 KB |
Output is correct |
93 |
Correct |
1 ms |
384 KB |
Output is correct |
94 |
Correct |
1 ms |
384 KB |
Output is correct |
95 |
Correct |
1 ms |
384 KB |
Output is correct |
96 |
Correct |
1 ms |
384 KB |
Output is correct |
97 |
Correct |
1 ms |
384 KB |
Output is correct |
98 |
Correct |
1 ms |
384 KB |
Output is correct |
99 |
Correct |
1 ms |
512 KB |
Output is correct |
100 |
Correct |
1 ms |
512 KB |
Output is correct |
101 |
Correct |
9 ms |
2048 KB |
Output is correct |
102 |
Correct |
8 ms |
1664 KB |
Output is correct |
103 |
Correct |
138 ms |
17012 KB |
Output is correct |
104 |
Correct |
109 ms |
17008 KB |
Output is correct |
105 |
Correct |
114 ms |
14316 KB |
Output is correct |
106 |
Correct |
110 ms |
17004 KB |
Output is correct |
107 |
Correct |
78 ms |
12524 KB |
Output is correct |
108 |
Correct |
81 ms |
12792 KB |
Output is correct |
109 |
Correct |
63 ms |
12012 KB |
Output is correct |
110 |
Correct |
55 ms |
11752 KB |
Output is correct |
111 |
Correct |
98 ms |
16364 KB |
Output is correct |
112 |
Correct |
121 ms |
15728 KB |
Output is correct |
113 |
Correct |
85 ms |
12396 KB |
Output is correct |
114 |
Correct |
99 ms |
17004 KB |
Output is correct |
115 |
Correct |
101 ms |
17004 KB |
Output is correct |