#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)
| ~^~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
7 ms |
9708 KB |
Output is correct |
| 2 |
Correct |
7 ms |
9708 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
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 |
| # |
Verdict |
Execution time |
Memory |
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 |
| # |
Verdict |
Execution time |
Memory |
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 |
| # |
Verdict |
Execution time |
Memory |
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 |
| # |
Verdict |
Execution time |
Memory |
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 |
