#include<bits/stdc++.h>
using namespace std;
#define ll long long
const int MAXN=2e5+6;
int fen[MAXN];
void update(int idx,int val)
{
idx++;
for(;idx<MAXN;idx+=idx&(-idx))
{
fen[idx]+=val;
}
}
int query(int idx)
{
idx++;
int ret=0;
for(;idx>0;idx-=idx&(-idx))
{
ret+=fen[idx];
}
return ret;
}
vector<int>shoes[MAXN][2];
bool vis[MAXN];
long long count_swaps(vector<int> s) {
for(int i=0;i<s.size();++i)
{
if(s[i]>0)shoes[s[i]][0].push_back(i);
else shoes[-s[i]][1].push_back(i);
}
for(int i=0;i<MAXN;i++)
{
reverse(shoes[i][0].begin(),shoes[i][0].end());
reverse(shoes[i][1].begin(),shoes[i][1].end());
}
for(int i=0;i<s.size();++i)
{
update(i,+1);
}
ll ans=0;
for(int i=0;i<s.size();++i)
{
if(vis[i])continue;
if(s[i]<0)
{
int k=shoes[-s[i]][0].back();
ans+=(ll)query(k)-query(i)-1;
update(i,+1);
vis[k]=1;
update(k+1,-1);
shoes[-s[i]][0].pop_back();
shoes[-s[i]][1].pop_back();
}
else
{
int k=shoes[s[i]][1].back();
ans+=(ll)query(k)-query(i);
update(i,+1);
update(k+1,-1);
vis[k]=1;
shoes[s[i]][1].pop_back();
shoes[s[i]][0].pop_back();
}
}
return ans;
}
Compilation message
shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:27:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
27 | for(int i=0;i<s.size();++i)
| ~^~~~~~~~~
shoes.cpp:37:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
37 | for(int i=0;i<s.size();++i)
| ~^~~~~~~~~
shoes.cpp:42:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
42 | for(int i=0;i<s.size();++i)
| ~^~~~~~~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
7 ms |
9708 KB |
Output is correct |
2 |
Correct |
7 ms |
9708 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
7 ms |
9708 KB |
Output is correct |
2 |
Correct |
7 ms |
9708 KB |
Output is correct |
3 |
Correct |
7 ms |
9708 KB |
Output is correct |
4 |
Correct |
7 ms |
9708 KB |
Output is correct |
5 |
Correct |
7 ms |
9708 KB |
Output is correct |
6 |
Correct |
7 ms |
9708 KB |
Output is correct |
7 |
Correct |
7 ms |
9708 KB |
Output is correct |
8 |
Correct |
7 ms |
9708 KB |
Output is correct |
9 |
Correct |
7 ms |
9708 KB |
Output is correct |
10 |
Correct |
7 ms |
9708 KB |
Output is correct |
11 |
Correct |
7 ms |
9708 KB |
Output is correct |
12 |
Correct |
7 ms |
9708 KB |
Output is correct |
13 |
Correct |
7 ms |
9708 KB |
Output is correct |
14 |
Correct |
7 ms |
9708 KB |
Output is correct |
15 |
Correct |
7 ms |
9708 KB |
Output is correct |
16 |
Correct |
7 ms |
9708 KB |
Output is correct |
17 |
Correct |
7 ms |
9708 KB |
Output is correct |
18 |
Correct |
7 ms |
9708 KB |
Output is correct |
19 |
Correct |
7 ms |
9836 KB |
Output is correct |
20 |
Correct |
7 ms |
9708 KB |
Output is correct |
21 |
Correct |
7 ms |
9708 KB |
Output is correct |
22 |
Correct |
7 ms |
9708 KB |
Output is correct |
23 |
Correct |
7 ms |
9708 KB |
Output is correct |
24 |
Correct |
7 ms |
9708 KB |
Output is correct |
25 |
Correct |
7 ms |
9708 KB |
Output is correct |
26 |
Correct |
7 ms |
9708 KB |
Output is correct |
27 |
Correct |
7 ms |
9728 KB |
Output is correct |
28 |
Correct |
8 ms |
9708 KB |
Output is correct |
29 |
Correct |
7 ms |
9708 KB |
Output is correct |
30 |
Correct |
7 ms |
9708 KB |
Output is correct |
31 |
Correct |
7 ms |
9708 KB |
Output is correct |
32 |
Correct |
7 ms |
9708 KB |
Output is correct |
33 |
Correct |
7 ms |
9708 KB |
Output is correct |
34 |
Correct |
7 ms |
9708 KB |
Output is correct |
35 |
Correct |
7 ms |
9708 KB |
Output is correct |
36 |
Correct |
7 ms |
9708 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
7 ms |
9708 KB |
Output is correct |
2 |
Correct |
7 ms |
9708 KB |
Output is correct |
3 |
Correct |
7 ms |
9708 KB |
Output is correct |
4 |
Correct |
7 ms |
9708 KB |
Output is correct |
5 |
Correct |
7 ms |
9708 KB |
Output is correct |
6 |
Correct |
7 ms |
9708 KB |
Output is correct |
7 |
Correct |
7 ms |
9708 KB |
Output is correct |
8 |
Correct |
7 ms |
9708 KB |
Output is correct |
9 |
Correct |
7 ms |
9708 KB |
Output is correct |
10 |
Correct |
7 ms |
9708 KB |
Output is correct |
11 |
Correct |
7 ms |
9708 KB |
Output is correct |
12 |
Correct |
7 ms |
9708 KB |
Output is correct |
13 |
Correct |
7 ms |
9708 KB |
Output is correct |
14 |
Correct |
7 ms |
9708 KB |
Output is correct |
15 |
Correct |
7 ms |
9708 KB |
Output is correct |
16 |
Correct |
7 ms |
9708 KB |
Output is correct |
17 |
Correct |
7 ms |
9708 KB |
Output is correct |
18 |
Correct |
7 ms |
9836 KB |
Output is correct |
19 |
Correct |
7 ms |
9836 KB |
Output is correct |
20 |
Correct |
11 ms |
10220 KB |
Output is correct |
21 |
Correct |
11 ms |
10220 KB |
Output is correct |
22 |
Correct |
51 ms |
13196 KB |
Output is correct |
23 |
Correct |
44 ms |
14560 KB |
Output is correct |
24 |
Correct |
46 ms |
14560 KB |
Output is correct |
25 |
Correct |
43 ms |
14180 KB |
Output is correct |
26 |
Correct |
46 ms |
14560 KB |
Output is correct |
27 |
Correct |
43 ms |
14304 KB |
Output is correct |
28 |
Correct |
42 ms |
14436 KB |
Output is correct |
29 |
Correct |
42 ms |
14308 KB |
Output is correct |
30 |
Correct |
43 ms |
14308 KB |
Output is correct |
31 |
Correct |
46 ms |
14448 KB |
Output is correct |
32 |
Correct |
43 ms |
14308 KB |
Output is correct |
33 |
Correct |
42 ms |
14180 KB |
Output is correct |
34 |
Correct |
42 ms |
14308 KB |
Output is correct |
35 |
Correct |
7 ms |
9708 KB |
Output is correct |
36 |
Correct |
7 ms |
9708 KB |
Output is correct |
37 |
Correct |
43 ms |
14372 KB |
Output is correct |
38 |
Correct |
43 ms |
14308 KB |
Output is correct |
39 |
Correct |
42 ms |
14308 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
7 ms |
9708 KB |
Output is correct |
2 |
Correct |
7 ms |
9708 KB |
Output is correct |
3 |
Correct |
7 ms |
9708 KB |
Output is correct |
4 |
Correct |
7 ms |
9708 KB |
Output is correct |
5 |
Correct |
87 ms |
18412 KB |
Output is correct |
6 |
Correct |
58 ms |
14828 KB |
Output is correct |
7 |
Correct |
85 ms |
19692 KB |
Output is correct |
8 |
Correct |
43 ms |
14348 KB |
Output is correct |
9 |
Correct |
81 ms |
19692 KB |
Output is correct |
10 |
Correct |
78 ms |
16620 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
7 ms |
9708 KB |
Output is correct |
2 |
Correct |
7 ms |
9708 KB |
Output is correct |
3 |
Correct |
7 ms |
9708 KB |
Output is correct |
4 |
Correct |
7 ms |
9708 KB |
Output is correct |
5 |
Correct |
7 ms |
9708 KB |
Output is correct |
6 |
Correct |
7 ms |
9708 KB |
Output is correct |
7 |
Correct |
7 ms |
9708 KB |
Output is correct |
8 |
Correct |
7 ms |
9708 KB |
Output is correct |
9 |
Correct |
7 ms |
9708 KB |
Output is correct |
10 |
Correct |
7 ms |
9708 KB |
Output is correct |
11 |
Correct |
7 ms |
9708 KB |
Output is correct |
12 |
Correct |
7 ms |
9708 KB |
Output is correct |
13 |
Correct |
7 ms |
9708 KB |
Output is correct |
14 |
Correct |
7 ms |
9708 KB |
Output is correct |
15 |
Correct |
7 ms |
9708 KB |
Output is correct |
16 |
Correct |
7 ms |
9708 KB |
Output is correct |
17 |
Correct |
7 ms |
9708 KB |
Output is correct |
18 |
Correct |
7 ms |
9708 KB |
Output is correct |
19 |
Correct |
7 ms |
9836 KB |
Output is correct |
20 |
Correct |
7 ms |
9708 KB |
Output is correct |
21 |
Correct |
7 ms |
9708 KB |
Output is correct |
22 |
Correct |
7 ms |
9708 KB |
Output is correct |
23 |
Correct |
7 ms |
9708 KB |
Output is correct |
24 |
Correct |
7 ms |
9708 KB |
Output is correct |
25 |
Correct |
7 ms |
9708 KB |
Output is correct |
26 |
Correct |
7 ms |
9708 KB |
Output is correct |
27 |
Correct |
7 ms |
9728 KB |
Output is correct |
28 |
Correct |
8 ms |
9708 KB |
Output is correct |
29 |
Correct |
7 ms |
9708 KB |
Output is correct |
30 |
Correct |
7 ms |
9708 KB |
Output is correct |
31 |
Correct |
7 ms |
9708 KB |
Output is correct |
32 |
Correct |
7 ms |
9708 KB |
Output is correct |
33 |
Correct |
7 ms |
9708 KB |
Output is correct |
34 |
Correct |
7 ms |
9708 KB |
Output is correct |
35 |
Correct |
7 ms |
9708 KB |
Output is correct |
36 |
Correct |
7 ms |
9708 KB |
Output is correct |
37 |
Correct |
7 ms |
9708 KB |
Output is correct |
38 |
Correct |
7 ms |
9708 KB |
Output is correct |
39 |
Correct |
7 ms |
9708 KB |
Output is correct |
40 |
Correct |
7 ms |
9708 KB |
Output is correct |
41 |
Correct |
8 ms |
9836 KB |
Output is correct |
42 |
Correct |
8 ms |
9836 KB |
Output is correct |
43 |
Correct |
8 ms |
9836 KB |
Output is correct |
44 |
Correct |
8 ms |
9836 KB |
Output is correct |
45 |
Correct |
8 ms |
9836 KB |
Output is correct |
46 |
Correct |
8 ms |
9836 KB |
Output is correct |
47 |
Correct |
8 ms |
9836 KB |
Output is correct |
48 |
Correct |
8 ms |
9836 KB |
Output is correct |
49 |
Correct |
8 ms |
9836 KB |
Output is correct |
50 |
Correct |
8 ms |
9708 KB |
Output is correct |
51 |
Correct |
7 ms |
9708 KB |
Output is correct |
52 |
Correct |
8 ms |
9836 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
7 ms |
9708 KB |
Output is correct |
2 |
Correct |
7 ms |
9708 KB |
Output is correct |
3 |
Correct |
7 ms |
9708 KB |
Output is correct |
4 |
Correct |
7 ms |
9708 KB |
Output is correct |
5 |
Correct |
7 ms |
9708 KB |
Output is correct |
6 |
Correct |
7 ms |
9708 KB |
Output is correct |
7 |
Correct |
7 ms |
9708 KB |
Output is correct |
8 |
Correct |
7 ms |
9708 KB |
Output is correct |
9 |
Correct |
7 ms |
9708 KB |
Output is correct |
10 |
Correct |
7 ms |
9708 KB |
Output is correct |
11 |
Correct |
7 ms |
9708 KB |
Output is correct |
12 |
Correct |
7 ms |
9708 KB |
Output is correct |
13 |
Correct |
7 ms |
9708 KB |
Output is correct |
14 |
Correct |
7 ms |
9708 KB |
Output is correct |
15 |
Correct |
7 ms |
9708 KB |
Output is correct |
16 |
Correct |
7 ms |
9708 KB |
Output is correct |
17 |
Correct |
7 ms |
9708 KB |
Output is correct |
18 |
Correct |
7 ms |
9708 KB |
Output is correct |
19 |
Correct |
7 ms |
9836 KB |
Output is correct |
20 |
Correct |
7 ms |
9708 KB |
Output is correct |
21 |
Correct |
7 ms |
9708 KB |
Output is correct |
22 |
Correct |
7 ms |
9708 KB |
Output is correct |
23 |
Correct |
7 ms |
9708 KB |
Output is correct |
24 |
Correct |
7 ms |
9708 KB |
Output is correct |
25 |
Correct |
7 ms |
9708 KB |
Output is correct |
26 |
Correct |
7 ms |
9708 KB |
Output is correct |
27 |
Correct |
7 ms |
9728 KB |
Output is correct |
28 |
Correct |
8 ms |
9708 KB |
Output is correct |
29 |
Correct |
7 ms |
9708 KB |
Output is correct |
30 |
Correct |
7 ms |
9708 KB |
Output is correct |
31 |
Correct |
7 ms |
9708 KB |
Output is correct |
32 |
Correct |
7 ms |
9708 KB |
Output is correct |
33 |
Correct |
7 ms |
9708 KB |
Output is correct |
34 |
Correct |
7 ms |
9708 KB |
Output is correct |
35 |
Correct |
7 ms |
9708 KB |
Output is correct |
36 |
Correct |
7 ms |
9708 KB |
Output is correct |
37 |
Correct |
7 ms |
9708 KB |
Output is correct |
38 |
Correct |
7 ms |
9708 KB |
Output is correct |
39 |
Correct |
7 ms |
9708 KB |
Output is correct |
40 |
Correct |
7 ms |
9708 KB |
Output is correct |
41 |
Correct |
7 ms |
9708 KB |
Output is correct |
42 |
Correct |
7 ms |
9708 KB |
Output is correct |
43 |
Correct |
7 ms |
9708 KB |
Output is correct |
44 |
Correct |
7 ms |
9708 KB |
Output is correct |
45 |
Correct |
7 ms |
9708 KB |
Output is correct |
46 |
Correct |
7 ms |
9708 KB |
Output is correct |
47 |
Correct |
7 ms |
9708 KB |
Output is correct |
48 |
Correct |
7 ms |
9708 KB |
Output is correct |
49 |
Correct |
7 ms |
9708 KB |
Output is correct |
50 |
Correct |
7 ms |
9708 KB |
Output is correct |
51 |
Correct |
7 ms |
9708 KB |
Output is correct |
52 |
Correct |
7 ms |
9836 KB |
Output is correct |
53 |
Correct |
7 ms |
9836 KB |
Output is correct |
54 |
Correct |
11 ms |
10220 KB |
Output is correct |
55 |
Correct |
11 ms |
10220 KB |
Output is correct |
56 |
Correct |
51 ms |
13196 KB |
Output is correct |
57 |
Correct |
44 ms |
14560 KB |
Output is correct |
58 |
Correct |
46 ms |
14560 KB |
Output is correct |
59 |
Correct |
43 ms |
14180 KB |
Output is correct |
60 |
Correct |
46 ms |
14560 KB |
Output is correct |
61 |
Correct |
43 ms |
14304 KB |
Output is correct |
62 |
Correct |
42 ms |
14436 KB |
Output is correct |
63 |
Correct |
42 ms |
14308 KB |
Output is correct |
64 |
Correct |
43 ms |
14308 KB |
Output is correct |
65 |
Correct |
46 ms |
14448 KB |
Output is correct |
66 |
Correct |
43 ms |
14308 KB |
Output is correct |
67 |
Correct |
42 ms |
14180 KB |
Output is correct |
68 |
Correct |
42 ms |
14308 KB |
Output is correct |
69 |
Correct |
7 ms |
9708 KB |
Output is correct |
70 |
Correct |
7 ms |
9708 KB |
Output is correct |
71 |
Correct |
43 ms |
14372 KB |
Output is correct |
72 |
Correct |
43 ms |
14308 KB |
Output is correct |
73 |
Correct |
42 ms |
14308 KB |
Output is correct |
74 |
Correct |
7 ms |
9708 KB |
Output is correct |
75 |
Correct |
7 ms |
9708 KB |
Output is correct |
76 |
Correct |
7 ms |
9708 KB |
Output is correct |
77 |
Correct |
7 ms |
9708 KB |
Output is correct |
78 |
Correct |
87 ms |
18412 KB |
Output is correct |
79 |
Correct |
58 ms |
14828 KB |
Output is correct |
80 |
Correct |
85 ms |
19692 KB |
Output is correct |
81 |
Correct |
43 ms |
14348 KB |
Output is correct |
82 |
Correct |
81 ms |
19692 KB |
Output is correct |
83 |
Correct |
78 ms |
16620 KB |
Output is correct |
84 |
Correct |
7 ms |
9708 KB |
Output is correct |
85 |
Correct |
7 ms |
9708 KB |
Output is correct |
86 |
Correct |
7 ms |
9708 KB |
Output is correct |
87 |
Correct |
7 ms |
9708 KB |
Output is correct |
88 |
Correct |
8 ms |
9836 KB |
Output is correct |
89 |
Correct |
8 ms |
9836 KB |
Output is correct |
90 |
Correct |
8 ms |
9836 KB |
Output is correct |
91 |
Correct |
8 ms |
9836 KB |
Output is correct |
92 |
Correct |
8 ms |
9836 KB |
Output is correct |
93 |
Correct |
8 ms |
9836 KB |
Output is correct |
94 |
Correct |
8 ms |
9836 KB |
Output is correct |
95 |
Correct |
8 ms |
9836 KB |
Output is correct |
96 |
Correct |
8 ms |
9836 KB |
Output is correct |
97 |
Correct |
8 ms |
9708 KB |
Output is correct |
98 |
Correct |
7 ms |
9708 KB |
Output is correct |
99 |
Correct |
8 ms |
9836 KB |
Output is correct |
100 |
Correct |
8 ms |
9836 KB |
Output is correct |
101 |
Correct |
14 ms |
10604 KB |
Output is correct |
102 |
Correct |
13 ms |
10220 KB |
Output is correct |
103 |
Correct |
101 ms |
19820 KB |
Output is correct |
104 |
Correct |
77 ms |
19820 KB |
Output is correct |
105 |
Correct |
93 ms |
17132 KB |
Output is correct |
106 |
Correct |
82 ms |
19692 KB |
Output is correct |
107 |
Correct |
64 ms |
15104 KB |
Output is correct |
108 |
Correct |
69 ms |
15468 KB |
Output is correct |
109 |
Correct |
45 ms |
14692 KB |
Output is correct |
110 |
Correct |
42 ms |
14308 KB |
Output is correct |
111 |
Correct |
85 ms |
18924 KB |
Output is correct |
112 |
Correct |
99 ms |
18412 KB |
Output is correct |
113 |
Correct |
62 ms |
14956 KB |
Output is correct |
114 |
Correct |
86 ms |
19692 KB |
Output is correct |
115 |
Correct |
84 ms |
19692 KB |
Output is correct |