## Submission #473109

# Submission time Handle Problem Language Result Execution time Memory
473109 2021-09-15T07:38:42 Z blue Arranging Shoes (IOI19_shoes) C++17
100 / 100
119 ms 17332 KB
```#include "shoes.h"
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;

const int maxN = 100'000;
vector<int> A[1+maxN];
vector<int> B[1+maxN];
vector<int> actpos;

long long count_swaps(vector<int> S)
{
int N = (int)S.size()/2;

for(int i = 0; i < 2*N; i++)
{
if(S[i] < 0) A[ -S[i] ].push_back(i);
else B[ S[i] ].push_back(i);
}
long long res = 0;

vector< pair<int, int> > X;
for(int s = 1; s <= N; s++)
{
for(int i = 0; i < A[s].size(); i++)
{
if(A[s][i] > B[s][i])
{
swap(A[s][i], B[s][i]);
res++;
}
X.push_back(make_pair(A[s][i], B[s][i]));
}
}
sort(X.begin(), X.end());

actpos = vector<int>(2*N);

int ct = -1;
for(pair<int, int> x: X)
{
actpos[ x.first ] = ++ct;
actpos[ x.second ] = ++ct;
}

vector<int> a_sort(2*N);
for(int i = 0; i < 2*N; i++) a_sort[i] = i;
sort(a_sort.begin(), a_sort.end(), [] (int u, int v)
{
return actpos[u] > actpos[v];
});

vector<int> BIT(1+2*N, 0);
for(int g: a_sort)
{
for(int i = g+1 - 1; i >= 1; i -= i&-i)
res += BIT[i];

for(int i = g+1; i <= 2*N; i += i&-i)
BIT[i]++;
}
return res;
}
```

### Compilation message

```shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:26:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
26 |         for(int i = 0; i < A[s].size(); i++)
|                        ~~^~~~~~~~~~~~~```

#### Subtask #1 10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct

#### Subtask #2 20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4988 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4992 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 4 ms 5056 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 4 ms 4940 KB Output is correct
16 Correct 4 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 4 ms 4988 KB Output is correct
20 Correct 4 ms 4940 KB Output is correct
21 Correct 3 ms 4940 KB Output is correct
22 Correct 3 ms 4972 KB Output is correct
23 Correct 3 ms 4888 KB Output is correct
24 Correct 4 ms 4940 KB Output is correct
25 Correct 4 ms 4940 KB Output is correct
26 Correct 3 ms 4940 KB Output is correct
27 Correct 3 ms 4940 KB Output is correct
28 Correct 3 ms 4940 KB Output is correct
29 Correct 3 ms 4940 KB Output is correct
30 Correct 3 ms 4940 KB Output is correct
31 Correct 3 ms 4940 KB Output is correct
32 Correct 3 ms 4940 KB Output is correct
33 Correct 3 ms 4940 KB Output is correct
34 Correct 3 ms 4940 KB Output is correct
35 Correct 3 ms 4940 KB Output is correct
36 Correct 4 ms 4940 KB Output is correct

#### Subtask #3 20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4992 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 4 ms 4940 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 3 ms 4940 KB Output is correct
14 Correct 3 ms 5068 KB Output is correct
15 Correct 4 ms 4940 KB Output is correct
16 Correct 4 ms 4940 KB Output is correct
17 Correct 3 ms 4988 KB Output is correct
18 Correct 4 ms 4996 KB Output is correct
19 Correct 4 ms 4940 KB Output is correct
20 Correct 8 ms 5644 KB Output is correct
21 Correct 8 ms 5580 KB Output is correct
22 Correct 55 ms 10720 KB Output is correct
23 Correct 51 ms 10612 KB Output is correct
24 Correct 55 ms 10712 KB Output is correct
25 Correct 71 ms 10728 KB Output is correct
26 Correct 65 ms 10804 KB Output is correct
27 Correct 47 ms 10704 KB Output is correct
28 Correct 73 ms 10680 KB Output is correct
29 Correct 72 ms 10724 KB Output is correct
30 Correct 71 ms 10724 KB Output is correct
31 Correct 54 ms 10644 KB Output is correct
32 Correct 86 ms 10716 KB Output is correct
33 Correct 71 ms 10680 KB Output is correct
34 Correct 73 ms 10624 KB Output is correct
35 Correct 3 ms 4940 KB Output is correct
36 Correct 4 ms 4920 KB Output is correct
37 Correct 71 ms 10628 KB Output is correct
38 Correct 82 ms 10616 KB Output is correct
39 Correct 72 ms 10616 KB Output is correct

#### Subtask #4 15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 4 ms 4948 KB Output is correct
4 Correct 4 ms 4940 KB Output is correct
5 Correct 111 ms 16276 KB Output is correct
6 Correct 97 ms 11472 KB Output is correct
7 Correct 100 ms 16292 KB Output is correct
8 Correct 78 ms 10888 KB Output is correct
9 Correct 102 ms 16284 KB Output is correct
10 Correct 96 ms 13268 KB Output is correct

#### Subtask #5 20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4988 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4992 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 4 ms 5056 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 4 ms 4940 KB Output is correct
16 Correct 4 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 4 ms 4988 KB Output is correct
20 Correct 4 ms 4940 KB Output is correct
21 Correct 3 ms 4940 KB Output is correct
22 Correct 3 ms 4972 KB Output is correct
23 Correct 3 ms 4888 KB Output is correct
24 Correct 4 ms 4940 KB Output is correct
25 Correct 4 ms 4940 KB Output is correct
26 Correct 3 ms 4940 KB Output is correct
27 Correct 3 ms 4940 KB Output is correct
28 Correct 3 ms 4940 KB Output is correct
29 Correct 3 ms 4940 KB Output is correct
30 Correct 3 ms 4940 KB Output is correct
31 Correct 3 ms 4940 KB Output is correct
32 Correct 3 ms 4940 KB Output is correct
33 Correct 3 ms 4940 KB Output is correct
34 Correct 3 ms 4940 KB Output is correct
35 Correct 3 ms 4940 KB Output is correct
36 Correct 4 ms 4940 KB Output is correct
37 Correct 3 ms 4940 KB Output is correct
38 Correct 3 ms 4940 KB Output is correct
39 Correct 4 ms 4940 KB Output is correct
40 Correct 4 ms 4940 KB Output is correct
41 Correct 4 ms 5068 KB Output is correct
42 Correct 4 ms 5068 KB Output is correct
43 Correct 4 ms 5068 KB Output is correct
44 Correct 5 ms 5068 KB Output is correct
45 Correct 4 ms 5068 KB Output is correct
46 Correct 4 ms 5068 KB Output is correct
47 Correct 4 ms 5068 KB Output is correct
48 Correct 4 ms 5068 KB Output is correct
49 Correct 4 ms 5000 KB Output is correct
50 Correct 4 ms 5068 KB Output is correct
51 Correct 4 ms 5040 KB Output is correct
52 Correct 4 ms 5068 KB Output is correct

#### Subtask #6 15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4940 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 3 ms 4940 KB Output is correct
4 Correct 3 ms 4940 KB Output is correct
5 Correct 3 ms 4940 KB Output is correct
6 Correct 3 ms 4940 KB Output is correct
7 Correct 3 ms 4988 KB Output is correct
8 Correct 3 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4992 KB Output is correct
11 Correct 3 ms 4940 KB Output is correct
12 Correct 3 ms 4940 KB Output is correct
13 Correct 4 ms 5056 KB Output is correct
14 Correct 3 ms 4940 KB Output is correct
15 Correct 4 ms 4940 KB Output is correct
16 Correct 4 ms 4940 KB Output is correct
17 Correct 3 ms 4940 KB Output is correct
18 Correct 3 ms 4940 KB Output is correct
19 Correct 4 ms 4988 KB Output is correct
20 Correct 4 ms 4940 KB Output is correct
21 Correct 3 ms 4940 KB Output is correct
22 Correct 3 ms 4972 KB Output is correct
23 Correct 3 ms 4888 KB Output is correct
24 Correct 4 ms 4940 KB Output is correct
25 Correct 4 ms 4940 KB Output is correct
26 Correct 3 ms 4940 KB Output is correct
27 Correct 3 ms 4940 KB Output is correct
28 Correct 3 ms 4940 KB Output is correct
29 Correct 3 ms 4940 KB Output is correct
30 Correct 3 ms 4940 KB Output is correct
31 Correct 3 ms 4940 KB Output is correct
32 Correct 3 ms 4940 KB Output is correct
33 Correct 3 ms 4940 KB Output is correct
34 Correct 3 ms 4940 KB Output is correct
35 Correct 3 ms 4940 KB Output is correct
36 Correct 4 ms 4940 KB Output is correct
37 Correct 3 ms 4940 KB Output is correct
38 Correct 3 ms 4940 KB Output is correct
39 Correct 3 ms 4992 KB Output is correct
40 Correct 3 ms 4940 KB Output is correct
41 Correct 4 ms 4940 KB Output is correct
42 Correct 3 ms 4940 KB Output is correct
43 Correct 3 ms 4940 KB Output is correct
44 Correct 3 ms 4940 KB Output is correct
45 Correct 3 ms 4940 KB Output is correct
46 Correct 3 ms 4940 KB Output is correct
47 Correct 3 ms 4940 KB Output is correct
48 Correct 3 ms 5068 KB Output is correct
49 Correct 4 ms 4940 KB Output is correct
50 Correct 4 ms 4940 KB Output is correct
51 Correct 3 ms 4988 KB Output is correct
52 Correct 4 ms 4996 KB Output is correct
53 Correct 4 ms 4940 KB Output is correct
54 Correct 8 ms 5644 KB Output is correct
55 Correct 8 ms 5580 KB Output is correct
56 Correct 55 ms 10720 KB Output is correct
57 Correct 51 ms 10612 KB Output is correct
58 Correct 55 ms 10712 KB Output is correct
59 Correct 71 ms 10728 KB Output is correct
60 Correct 65 ms 10804 KB Output is correct
61 Correct 47 ms 10704 KB Output is correct
62 Correct 73 ms 10680 KB Output is correct
63 Correct 72 ms 10724 KB Output is correct
64 Correct 71 ms 10724 KB Output is correct
65 Correct 54 ms 10644 KB Output is correct
66 Correct 86 ms 10716 KB Output is correct
67 Correct 71 ms 10680 KB Output is correct
68 Correct 73 ms 10624 KB Output is correct
69 Correct 3 ms 4940 KB Output is correct
70 Correct 4 ms 4920 KB Output is correct
71 Correct 71 ms 10628 KB Output is correct
72 Correct 82 ms 10616 KB Output is correct
73 Correct 72 ms 10616 KB Output is correct
74 Correct 4 ms 4940 KB Output is correct
75 Correct 3 ms 4940 KB Output is correct
76 Correct 4 ms 4948 KB Output is correct
77 Correct 4 ms 4940 KB Output is correct
78 Correct 111 ms 16276 KB Output is correct
79 Correct 97 ms 11472 KB Output is correct
80 Correct 100 ms 16292 KB Output is correct
81 Correct 78 ms 10888 KB Output is correct
82 Correct 102 ms 16284 KB Output is correct
83 Correct 96 ms 13268 KB Output is correct
84 Correct 3 ms 4940 KB Output is correct
85 Correct 3 ms 4940 KB Output is correct
86 Correct 4 ms 4940 KB Output is correct
87 Correct 4 ms 4940 KB Output is correct
88 Correct 4 ms 5068 KB Output is correct
89 Correct 4 ms 5068 KB Output is correct
90 Correct 4 ms 5068 KB Output is correct
91 Correct 5 ms 5068 KB Output is correct
92 Correct 4 ms 5068 KB Output is correct
93 Correct 4 ms 5068 KB Output is correct
94 Correct 4 ms 5068 KB Output is correct
95 Correct 4 ms 5068 KB Output is correct
96 Correct 4 ms 5000 KB Output is correct
97 Correct 4 ms 5068 KB Output is correct
98 Correct 4 ms 5040 KB Output is correct
99 Correct 4 ms 5068 KB Output is correct
100 Correct 4 ms 5068 KB Output is correct
101 Correct 11 ms 6060 KB Output is correct
102 Correct 10 ms 5708 KB Output is correct
103 Correct 99 ms 17256 KB Output is correct
104 Correct 88 ms 17332 KB Output is correct
105 Correct 102 ms 14588 KB Output is correct
106 Correct 119 ms 17208 KB Output is correct
107 Correct 78 ms 12668 KB Output is correct
108 Correct 70 ms 12924 KB Output is correct
109 Correct 85 ms 12272 KB Output is correct
110 Correct 73 ms 11864 KB Output is correct
111 Correct 105 ms 16624 KB Output is correct
112 Correct 107 ms 15864 KB Output is correct
113 Correct 80 ms 12608 KB Output is correct
114 Correct 98 ms 17208 KB Output is correct
115 Correct 109 ms 17268 KB Output is correct