#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
vector<int> tree;
int nc;
int query(int a, int b){
a += nc;
b += nc;
int s = 0;
while (a <= b){
if (a%2){
s += tree[a++];
}
if (b%2 == 0){
s += tree[b--];
}
a /= 2;
b /= 2;
}
return s;
}
void update(int k, int x){
k += nc;
tree[k] = x;
k /= 2;
while (k >= 1){
tree[k] = tree[2*k] + tree[2*k+1];
k /= 2;
}
}
long long count_swaps(vector<int> s) {
int n = s.size();
vector<vector<int>> pos(n), neg(n);
for (int i = 0; i<n; i++){
int g = abs(s[i]);
if (s[i] < 0){
neg[g].push_back(i);
}
else{
pos[g].push_back(i);
}
}
for (int i = 0; i<n; i++){
reverse(pos[i].begin(),pos[i].end());
reverse(neg[i].begin(),neg[i].end());
}
nc = 1;
while ((1<<nc) < n) nc++;
nc = 1<<nc;
tree.resize(2*nc);
for (int i = 0; i<n; i++){
tree[nc+i] = 1;
}
for (int i = nc-1; i>=1; i--){
tree[i] = tree[2*i] + tree[2*i+1];
}
long long ans = 0;
for (int i = 0; i<n; i++){
int val = s[i];
int g = abs(s[i]);
if (s[i] > 0){
if (pos[g].empty() || pos[g].back() != i) continue;
pos[g].pop_back();
}
else{
if (neg[g].empty() || neg[g].back() != i) continue;
neg[g].pop_back();
}
int ind = -1;
int rev = -s[i];
if (rev > 0){
ind = pos[g].back();
pos[g].pop_back();
}
else{
ind = neg[g].back();
neg[g].pop_back();
}
ans += query(i+1,ind-1);
if (s[i] > 0) ans++;
update(i,0);
update(ind,0);
}
return ans;
}
Compilation message
shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:64:15: warning: unused variable 'val' [-Wunused-variable]
64 | int val = s[i];
| ^~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
432 KB |
Output is correct |
13 |
Correct |
0 ms |
348 KB |
Output is correct |
14 |
Correct |
0 ms |
428 KB |
Output is correct |
15 |
Correct |
0 ms |
604 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
0 ms |
348 KB |
Output is correct |
18 |
Correct |
0 ms |
428 KB |
Output is correct |
19 |
Correct |
0 ms |
348 KB |
Output is correct |
20 |
Correct |
0 ms |
348 KB |
Output is correct |
21 |
Correct |
0 ms |
348 KB |
Output is correct |
22 |
Correct |
0 ms |
436 KB |
Output is correct |
23 |
Correct |
0 ms |
348 KB |
Output is correct |
24 |
Correct |
0 ms |
348 KB |
Output is correct |
25 |
Correct |
0 ms |
344 KB |
Output is correct |
26 |
Correct |
0 ms |
356 KB |
Output is correct |
27 |
Correct |
0 ms |
348 KB |
Output is correct |
28 |
Correct |
0 ms |
348 KB |
Output is correct |
29 |
Correct |
0 ms |
348 KB |
Output is correct |
30 |
Correct |
0 ms |
348 KB |
Output is correct |
31 |
Correct |
0 ms |
432 KB |
Output is correct |
32 |
Correct |
0 ms |
600 KB |
Output is correct |
33 |
Correct |
0 ms |
348 KB |
Output is correct |
34 |
Correct |
0 ms |
436 KB |
Output is correct |
35 |
Correct |
1 ms |
348 KB |
Output is correct |
36 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
344 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
344 KB |
Output is correct |
13 |
Correct |
0 ms |
348 KB |
Output is correct |
14 |
Correct |
0 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
0 ms |
348 KB |
Output is correct |
18 |
Correct |
1 ms |
344 KB |
Output is correct |
19 |
Correct |
1 ms |
344 KB |
Output is correct |
20 |
Correct |
3 ms |
1896 KB |
Output is correct |
21 |
Correct |
4 ms |
1884 KB |
Output is correct |
22 |
Correct |
33 ms |
15632 KB |
Output is correct |
23 |
Correct |
25 ms |
15568 KB |
Output is correct |
24 |
Correct |
31 ms |
15532 KB |
Output is correct |
25 |
Correct |
30 ms |
15180 KB |
Output is correct |
26 |
Correct |
31 ms |
15564 KB |
Output is correct |
27 |
Correct |
24 ms |
15312 KB |
Output is correct |
28 |
Correct |
30 ms |
15444 KB |
Output is correct |
29 |
Correct |
31 ms |
15444 KB |
Output is correct |
30 |
Correct |
30 ms |
15440 KB |
Output is correct |
31 |
Correct |
32 ms |
15452 KB |
Output is correct |
32 |
Correct |
31 ms |
15444 KB |
Output is correct |
33 |
Correct |
29 ms |
15444 KB |
Output is correct |
34 |
Correct |
30 ms |
15440 KB |
Output is correct |
35 |
Correct |
0 ms |
348 KB |
Output is correct |
36 |
Correct |
0 ms |
344 KB |
Output is correct |
37 |
Correct |
30 ms |
15656 KB |
Output is correct |
38 |
Correct |
30 ms |
15440 KB |
Output is correct |
39 |
Correct |
31 ms |
15444 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
47 ms |
20924 KB |
Output is correct |
6 |
Correct |
37 ms |
15956 KB |
Output is correct |
7 |
Correct |
59 ms |
20704 KB |
Output is correct |
8 |
Correct |
32 ms |
15600 KB |
Output is correct |
9 |
Correct |
48 ms |
20920 KB |
Output is correct |
10 |
Correct |
43 ms |
17748 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
432 KB |
Output is correct |
13 |
Correct |
0 ms |
348 KB |
Output is correct |
14 |
Correct |
0 ms |
428 KB |
Output is correct |
15 |
Correct |
0 ms |
604 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
0 ms |
348 KB |
Output is correct |
18 |
Correct |
0 ms |
428 KB |
Output is correct |
19 |
Correct |
0 ms |
348 KB |
Output is correct |
20 |
Correct |
0 ms |
348 KB |
Output is correct |
21 |
Correct |
0 ms |
348 KB |
Output is correct |
22 |
Correct |
0 ms |
436 KB |
Output is correct |
23 |
Correct |
0 ms |
348 KB |
Output is correct |
24 |
Correct |
0 ms |
348 KB |
Output is correct |
25 |
Correct |
0 ms |
344 KB |
Output is correct |
26 |
Correct |
0 ms |
356 KB |
Output is correct |
27 |
Correct |
0 ms |
348 KB |
Output is correct |
28 |
Correct |
0 ms |
348 KB |
Output is correct |
29 |
Correct |
0 ms |
348 KB |
Output is correct |
30 |
Correct |
0 ms |
348 KB |
Output is correct |
31 |
Correct |
0 ms |
432 KB |
Output is correct |
32 |
Correct |
0 ms |
600 KB |
Output is correct |
33 |
Correct |
0 ms |
348 KB |
Output is correct |
34 |
Correct |
0 ms |
436 KB |
Output is correct |
35 |
Correct |
1 ms |
348 KB |
Output is correct |
36 |
Correct |
0 ms |
348 KB |
Output is correct |
37 |
Correct |
0 ms |
348 KB |
Output is correct |
38 |
Correct |
0 ms |
348 KB |
Output is correct |
39 |
Correct |
0 ms |
344 KB |
Output is correct |
40 |
Correct |
0 ms |
348 KB |
Output is correct |
41 |
Correct |
1 ms |
600 KB |
Output is correct |
42 |
Correct |
1 ms |
604 KB |
Output is correct |
43 |
Correct |
1 ms |
604 KB |
Output is correct |
44 |
Correct |
1 ms |
444 KB |
Output is correct |
45 |
Correct |
1 ms |
600 KB |
Output is correct |
46 |
Correct |
1 ms |
348 KB |
Output is correct |
47 |
Correct |
1 ms |
348 KB |
Output is correct |
48 |
Correct |
1 ms |
388 KB |
Output is correct |
49 |
Correct |
1 ms |
580 KB |
Output is correct |
50 |
Correct |
0 ms |
348 KB |
Output is correct |
51 |
Correct |
1 ms |
348 KB |
Output is correct |
52 |
Correct |
1 ms |
604 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
348 KB |
Output is correct |
10 |
Correct |
0 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
432 KB |
Output is correct |
13 |
Correct |
0 ms |
348 KB |
Output is correct |
14 |
Correct |
0 ms |
428 KB |
Output is correct |
15 |
Correct |
0 ms |
604 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
0 ms |
348 KB |
Output is correct |
18 |
Correct |
0 ms |
428 KB |
Output is correct |
19 |
Correct |
0 ms |
348 KB |
Output is correct |
20 |
Correct |
0 ms |
348 KB |
Output is correct |
21 |
Correct |
0 ms |
348 KB |
Output is correct |
22 |
Correct |
0 ms |
436 KB |
Output is correct |
23 |
Correct |
0 ms |
348 KB |
Output is correct |
24 |
Correct |
0 ms |
348 KB |
Output is correct |
25 |
Correct |
0 ms |
344 KB |
Output is correct |
26 |
Correct |
0 ms |
356 KB |
Output is correct |
27 |
Correct |
0 ms |
348 KB |
Output is correct |
28 |
Correct |
0 ms |
348 KB |
Output is correct |
29 |
Correct |
0 ms |
348 KB |
Output is correct |
30 |
Correct |
0 ms |
348 KB |
Output is correct |
31 |
Correct |
0 ms |
432 KB |
Output is correct |
32 |
Correct |
0 ms |
600 KB |
Output is correct |
33 |
Correct |
0 ms |
348 KB |
Output is correct |
34 |
Correct |
0 ms |
436 KB |
Output is correct |
35 |
Correct |
1 ms |
348 KB |
Output is correct |
36 |
Correct |
0 ms |
348 KB |
Output is correct |
37 |
Correct |
0 ms |
344 KB |
Output is correct |
38 |
Correct |
0 ms |
348 KB |
Output is correct |
39 |
Correct |
0 ms |
348 KB |
Output is correct |
40 |
Correct |
0 ms |
348 KB |
Output is correct |
41 |
Correct |
0 ms |
348 KB |
Output is correct |
42 |
Correct |
0 ms |
348 KB |
Output is correct |
43 |
Correct |
0 ms |
348 KB |
Output is correct |
44 |
Correct |
0 ms |
348 KB |
Output is correct |
45 |
Correct |
0 ms |
348 KB |
Output is correct |
46 |
Correct |
0 ms |
344 KB |
Output is correct |
47 |
Correct |
0 ms |
348 KB |
Output is correct |
48 |
Correct |
0 ms |
348 KB |
Output is correct |
49 |
Correct |
0 ms |
348 KB |
Output is correct |
50 |
Correct |
0 ms |
348 KB |
Output is correct |
51 |
Correct |
0 ms |
348 KB |
Output is correct |
52 |
Correct |
1 ms |
344 KB |
Output is correct |
53 |
Correct |
1 ms |
344 KB |
Output is correct |
54 |
Correct |
3 ms |
1896 KB |
Output is correct |
55 |
Correct |
4 ms |
1884 KB |
Output is correct |
56 |
Correct |
33 ms |
15632 KB |
Output is correct |
57 |
Correct |
25 ms |
15568 KB |
Output is correct |
58 |
Correct |
31 ms |
15532 KB |
Output is correct |
59 |
Correct |
30 ms |
15180 KB |
Output is correct |
60 |
Correct |
31 ms |
15564 KB |
Output is correct |
61 |
Correct |
24 ms |
15312 KB |
Output is correct |
62 |
Correct |
30 ms |
15444 KB |
Output is correct |
63 |
Correct |
31 ms |
15444 KB |
Output is correct |
64 |
Correct |
30 ms |
15440 KB |
Output is correct |
65 |
Correct |
32 ms |
15452 KB |
Output is correct |
66 |
Correct |
31 ms |
15444 KB |
Output is correct |
67 |
Correct |
29 ms |
15444 KB |
Output is correct |
68 |
Correct |
30 ms |
15440 KB |
Output is correct |
69 |
Correct |
0 ms |
348 KB |
Output is correct |
70 |
Correct |
0 ms |
344 KB |
Output is correct |
71 |
Correct |
30 ms |
15656 KB |
Output is correct |
72 |
Correct |
30 ms |
15440 KB |
Output is correct |
73 |
Correct |
31 ms |
15444 KB |
Output is correct |
74 |
Correct |
0 ms |
348 KB |
Output is correct |
75 |
Correct |
0 ms |
348 KB |
Output is correct |
76 |
Correct |
0 ms |
348 KB |
Output is correct |
77 |
Correct |
0 ms |
348 KB |
Output is correct |
78 |
Correct |
47 ms |
20924 KB |
Output is correct |
79 |
Correct |
37 ms |
15956 KB |
Output is correct |
80 |
Correct |
59 ms |
20704 KB |
Output is correct |
81 |
Correct |
32 ms |
15600 KB |
Output is correct |
82 |
Correct |
48 ms |
20920 KB |
Output is correct |
83 |
Correct |
43 ms |
17748 KB |
Output is correct |
84 |
Correct |
0 ms |
348 KB |
Output is correct |
85 |
Correct |
0 ms |
348 KB |
Output is correct |
86 |
Correct |
0 ms |
344 KB |
Output is correct |
87 |
Correct |
0 ms |
348 KB |
Output is correct |
88 |
Correct |
1 ms |
600 KB |
Output is correct |
89 |
Correct |
1 ms |
604 KB |
Output is correct |
90 |
Correct |
1 ms |
604 KB |
Output is correct |
91 |
Correct |
1 ms |
444 KB |
Output is correct |
92 |
Correct |
1 ms |
600 KB |
Output is correct |
93 |
Correct |
1 ms |
348 KB |
Output is correct |
94 |
Correct |
1 ms |
348 KB |
Output is correct |
95 |
Correct |
1 ms |
388 KB |
Output is correct |
96 |
Correct |
1 ms |
580 KB |
Output is correct |
97 |
Correct |
0 ms |
348 KB |
Output is correct |
98 |
Correct |
1 ms |
348 KB |
Output is correct |
99 |
Correct |
1 ms |
604 KB |
Output is correct |
100 |
Correct |
1 ms |
600 KB |
Output is correct |
101 |
Correct |
5 ms |
2396 KB |
Output is correct |
102 |
Correct |
5 ms |
2044 KB |
Output is correct |
103 |
Correct |
70 ms |
20952 KB |
Output is correct |
104 |
Correct |
43 ms |
20820 KB |
Output is correct |
105 |
Correct |
52 ms |
18268 KB |
Output is correct |
106 |
Correct |
44 ms |
20828 KB |
Output is correct |
107 |
Correct |
39 ms |
16212 KB |
Output is correct |
108 |
Correct |
36 ms |
16464 KB |
Output is correct |
109 |
Correct |
34 ms |
15824 KB |
Output is correct |
110 |
Correct |
32 ms |
15432 KB |
Output is correct |
111 |
Correct |
48 ms |
20060 KB |
Output is correct |
112 |
Correct |
49 ms |
19540 KB |
Output is correct |
113 |
Correct |
43 ms |
16208 KB |
Output is correct |
114 |
Correct |
46 ms |
20820 KB |
Output is correct |
115 |
Correct |
49 ms |
20920 KB |
Output is correct |