oj.uz

Submission #170618

# Submission time Handle Problem Language Result Execution time Memory
170618 2019-12-25T19:43:42 Z nobik Arranging Shoes (IOI19_shoes) C++14
100 / 100
 753 ms 148188 KB 
#include "shoes.h"

#include <bits/stdc++.h>
using namespace std;

struct FenwichTree {
	int n;
	vector<int> f;

	FenwichTree(int n): n(n), f(n + 1) {}

	void Modify(int pos, int value) {
		for (int i = pos + 1; i <= n; i += i & -i) {
			f[i] += value;
		}
	}

	int Get(int pos) {
		int result = 0;
		for (int i = pos + 1; i > 0; i -= i & -i) {
			result += f[i];
		}

		return result;
	}
};

vector<int> GetShoePairs(const vector<int>& s) {
	int n = static_cast<int>(s.size());

	vector<int> shoe_pair(n);
	map<int, queue<int>> position;

	for (int i = 0; i < n; ++i) {
		int shoe = s[i];
		if (!position[-shoe].empty()) {
			int pos = position[-shoe].front();
			shoe_pair[pos] = i;
			shoe_pair[i] = pos;
			position[-shoe].pop();
			continue;
		}

		position[shoe].push(i);
	}

	return shoe_pair;
}

long long count_swaps(std::vector<int> s) {
	int n = static_cast<int>(s.size());
	vector<int> shoe_pair = GetShoePairs(s);
	vector<int> used(n);

	FenwichTree tree(n);
	for (int i = 0; i < n; ++i) 
		tree.Modify(i, +1);

	long long result = 0;
	for (int i = 0; i < n; ++i) {
		if (used[i])
			continue;

		int pr = shoe_pair[i];
		int actual_pos = tree.Get(pr) - 1;

		if (s[i] < 0)
			result += actual_pos - 1;
		else
			result += actual_pos;

		used[i] = used[pr] = 1;
		tree.Modify(i, -1);
		tree.Modify(pr, -1);
	}

	return result;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 128 KB Output is correct
8 Correct 2 ms 256 KB Output is correct
9 Correct 2 ms 252 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 256 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 256 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 256 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 256 KB Output is correct
19 Correct 2 ms 252 KB Output is correct
20 Correct 2 ms 380 KB Output is correct
21 Correct 2 ms 256 KB Output is correct
22 Correct 2 ms 256 KB Output is correct
23 Correct 2 ms 256 KB Output is correct
24 Correct 2 ms 256 KB Output is correct
25 Correct 2 ms 256 KB Output is correct
26 Correct 2 ms 256 KB Output is correct
27 Correct 2 ms 256 KB Output is correct
28 Correct 2 ms 256 KB Output is correct
29 Correct 2 ms 256 KB Output is correct
30 Correct 2 ms 252 KB Output is correct
31 Correct 2 ms 256 KB Output is correct
32 Correct 2 ms 256 KB Output is correct
33 Correct 2 ms 376 KB Output is correct
34 Correct 2 ms 376 KB Output is correct
35 Correct 2 ms 376 KB Output is correct
36 Correct 2 ms 256 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 2 ms 256 KB Output is correct
7 Correct 2 ms 256 KB Output is correct
8 Correct 2 ms 256 KB Output is correct
9 Correct 2 ms 256 KB Output is correct
10 Correct 2 ms 256 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 256 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 400 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 6 ms 888 KB Output is correct
21 Correct 6 ms 888 KB Output is correct
22 Correct 43 ms 5496 KB Output is correct
23 Correct 38 ms 5600 KB Output is correct
24 Correct 43 ms 5496 KB Output is correct
25 Correct 39 ms 5460 KB Output is correct
26 Correct 43 ms 5496 KB Output is correct
27 Correct 36 ms 5368 KB Output is correct
28 Correct 40 ms 5592 KB Output is correct
29 Correct 40 ms 5588 KB Output is correct
30 Correct 40 ms 5616 KB Output is correct
31 Correct 43 ms 5496 KB Output is correct
32 Correct 41 ms 5592 KB Output is correct
33 Correct 39 ms 5464 KB Output is correct
34 Correct 41 ms 5580 KB Output is correct
35 Correct 2 ms 376 KB Output is correct
36 Correct 2 ms 256 KB Output is correct
37 Correct 40 ms 5688 KB Output is correct
38 Correct 40 ms 5724 KB Output is correct
39 Correct 42 ms 5716 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 256 KB Output is correct
5 Correct 753 ms 148184 KB Output is correct
6 Correct 157 ms 16504 KB Output is correct
7 Correct 667 ms 147960 KB Output is correct
8 Correct 47 ms 5712 KB Output is correct
9 Correct 582 ms 148088 KB Output is correct
10 Correct 359 ms 76024 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 128 KB Output is correct
8 Correct 2 ms 256 KB Output is correct
9 Correct 2 ms 252 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 256 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 256 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 256 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 256 KB Output is correct
19 Correct 2 ms 252 KB Output is correct
20 Correct 2 ms 380 KB Output is correct
21 Correct 2 ms 256 KB Output is correct
22 Correct 2 ms 256 KB Output is correct
23 Correct 2 ms 256 KB Output is correct
24 Correct 2 ms 256 KB Output is correct
25 Correct 2 ms 256 KB Output is correct
26 Correct 2 ms 256 KB Output is correct
27 Correct 2 ms 256 KB Output is correct
28 Correct 2 ms 256 KB Output is correct
29 Correct 2 ms 256 KB Output is correct
30 Correct 2 ms 252 KB Output is correct
31 Correct 2 ms 256 KB Output is correct
32 Correct 2 ms 256 KB Output is correct
33 Correct 2 ms 376 KB Output is correct
34 Correct 2 ms 376 KB Output is correct
35 Correct 2 ms 376 KB Output is correct
36 Correct 2 ms 256 KB Output is correct
37 Correct 2 ms 256 KB Output is correct
38 Correct 2 ms 376 KB Output is correct
39 Correct 2 ms 504 KB Output is correct
40 Correct 2 ms 616 KB Output is correct
41 Correct 5 ms 1784 KB Output is correct
42 Correct 4 ms 1784 KB Output is correct
43 Correct 4 ms 1528 KB Output is correct
44 Correct 4 ms 1400 KB Output is correct
45 Correct 4 ms 1272 KB Output is correct
46 Correct 3 ms 1144 KB Output is correct
47 Correct 3 ms 888 KB Output is correct
48 Correct 3 ms 760 KB Output is correct
49 Correct 3 ms 632 KB Output is correct
50 Correct 2 ms 380 KB Output is correct
51 Correct 2 ms 376 KB Output is correct
52 Correct 4 ms 1784 KB Output is correct

Subtask #6
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 256 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 256 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 128 KB Output is correct
8 Correct 2 ms 256 KB Output is correct
9 Correct 2 ms 252 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 256 KB Output is correct
12 Correct 2 ms 256 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 256 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 256 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 256 KB Output is correct
19 Correct 2 ms 252 KB Output is correct
20 Correct 2 ms 380 KB Output is correct
21 Correct 2 ms 256 KB Output is correct
22 Correct 2 ms 256 KB Output is correct
23 Correct 2 ms 256 KB Output is correct
24 Correct 2 ms 256 KB Output is correct
25 Correct 2 ms 256 KB Output is correct
26 Correct 2 ms 256 KB Output is correct
27 Correct 2 ms 256 KB Output is correct
28 Correct 2 ms 256 KB Output is correct
29 Correct 2 ms 256 KB Output is correct
30 Correct 2 ms 252 KB Output is correct
31 Correct 2 ms 256 KB Output is correct
32 Correct 2 ms 256 KB Output is correct
33 Correct 2 ms 376 KB Output is correct
34 Correct 2 ms 376 KB Output is correct
35 Correct 2 ms 376 KB Output is correct
36 Correct 2 ms 256 KB Output is correct
37 Correct 2 ms 376 KB Output is correct
38 Correct 2 ms 376 KB Output is correct
39 Correct 2 ms 256 KB Output is correct
40 Correct 2 ms 256 KB Output is correct
41 Correct 2 ms 256 KB Output is correct
42 Correct 2 ms 256 KB Output is correct
43 Correct 2 ms 256 KB Output is correct
44 Correct 2 ms 256 KB Output is correct
45 Correct 2 ms 256 KB Output is correct
46 Correct 2 ms 376 KB Output is correct
47 Correct 2 ms 376 KB Output is correct
48 Correct 2 ms 256 KB Output is correct
49 Correct 2 ms 376 KB Output is correct
50 Correct 2 ms 400 KB Output is correct
51 Correct 2 ms 376 KB Output is correct
52 Correct 2 ms 376 KB Output is correct
53 Correct 2 ms 376 KB Output is correct
54 Correct 6 ms 888 KB Output is correct
55 Correct 6 ms 888 KB Output is correct
56 Correct 43 ms 5496 KB Output is correct
57 Correct 38 ms 5600 KB Output is correct
58 Correct 43 ms 5496 KB Output is correct
59 Correct 39 ms 5460 KB Output is correct
60 Correct 43 ms 5496 KB Output is correct
61 Correct 36 ms 5368 KB Output is correct
62 Correct 40 ms 5592 KB Output is correct
63 Correct 40 ms 5588 KB Output is correct
64 Correct 40 ms 5616 KB Output is correct
65 Correct 43 ms 5496 KB Output is correct
66 Correct 41 ms 5592 KB Output is correct
67 Correct 39 ms 5464 KB Output is correct
68 Correct 41 ms 5580 KB Output is correct
69 Correct 2 ms 376 KB Output is correct
70 Correct 2 ms 256 KB Output is correct
71 Correct 40 ms 5688 KB Output is correct
72 Correct 40 ms 5724 KB Output is correct
73 Correct 42 ms 5716 KB Output is correct
74 Correct 2 ms 376 KB Output is correct
75 Correct 2 ms 376 KB Output is correct
76 Correct 2 ms 376 KB Output is correct
77 Correct 2 ms 256 KB Output is correct
78 Correct 753 ms 148184 KB Output is correct
79 Correct 157 ms 16504 KB Output is correct
80 Correct 667 ms 147960 KB Output is correct
81 Correct 47 ms 5712 KB Output is correct
82 Correct 582 ms 148088 KB Output is correct
83 Correct 359 ms 76024 KB Output is correct
84 Correct 2 ms 256 KB Output is correct
85 Correct 2 ms 376 KB Output is correct
86 Correct 2 ms 504 KB Output is correct
87 Correct 2 ms 616 KB Output is correct
88 Correct 5 ms 1784 KB Output is correct
89 Correct 4 ms 1784 KB Output is correct
90 Correct 4 ms 1528 KB Output is correct
91 Correct 4 ms 1400 KB Output is correct
92 Correct 4 ms 1272 KB Output is correct
93 Correct 3 ms 1144 KB Output is correct
94 Correct 3 ms 888 KB Output is correct
95 Correct 3 ms 760 KB Output is correct
96 Correct 3 ms 632 KB Output is correct
97 Correct 2 ms 380 KB Output is correct
98 Correct 2 ms 376 KB Output is correct
99 Correct 4 ms 1784 KB Output is correct
100 Correct 4 ms 1784 KB Output is correct
101 Correct 35 ms 13688 KB Output is correct
102 Correct 16 ms 3452 KB Output is correct
103 Correct 622 ms 147932 KB Output is correct
104 Correct 542 ms 148188 KB Output is correct
105 Correct 372 ms 85752 KB Output is correct
106 Correct 606 ms 148088 KB Output is correct
107 Correct 163 ms 19960 KB Output is correct
108 Correct 198 ms 35916 KB Output is correct
109 Correct 42 ms 5616 KB Output is correct
110 Correct 40 ms 5720 KB Output is correct
111 Correct 544 ms 132052 KB Output is correct
112 Correct 535 ms 116072 KB Output is correct
113 Correct 179 ms 21624 KB Output is correct
114 Correct 617 ms 147948 KB Output is correct
115 Correct 594 ms 148088 KB Output is correct