oj.uz

Submission #769303

# Submission time Handle Problem Language Result Execution time Memory
769303 2023-06-29T11:48:14 Z erekle Arranging Shoes (IOI19_shoes) C++17
100 / 100
 56 ms 14860 KB 
#include "shoes.h"
#include <algorithm>
#include <vector>

using namespace std;

// Fenwick tree
void update(vector<int> &fenwick, int index, int value) {
	while (index < (int)fenwick.size()) {
		fenwick[index] += value;
		index += index & -index;
	}
}
int getSum(const vector<int> &fenwick, int index) {
	int sum = 0;
	while (index) {
		sum += fenwick[index];
		index -= index & -index;
	}
	return sum;
}
// Reverse fenwick tree for suffix sums
void updateR(vector<int> &fenwick, int index, int value) {
	update(fenwick, (int)fenwick.size()-index, value);
}
int getSumR(const vector<int> &fenwick, int index) {
	return getSum(fenwick, (int)fenwick.size()-index);
}

long long count_swaps(vector<int> s) {
	int n = (int)s.size() / 2;
	vector<vector<int>> nxt[2];
	nxt[0] = nxt[1] = vector<vector<int>>(1+n);
	for (int i = 2*n-1; i >= 0; --i) {
		if (s[i] < 0) nxt[0][-s[i]].push_back(i);
		else nxt[1][s[i]].push_back(i);
	}

	vector<int> fenwickMoved(1+2*n);
	vector<bool> paired(2*n);

	long long swaps = 0;
	for (int i = 0; i < 2*n; ++i) {
		if (paired[i]) continue;
		int v = abs(s[i]), side = s[i] > 0;
		int j = nxt[1-side][v].back();

		swaps += (j + getSumR(fenwickMoved, j+1)) - (i + getSumR(fenwickMoved, i+1));
		if (!side) --swaps; // do not need to swap with each other
		updateR(fenwickMoved, j+1, +1);
	
		paired[i] = true, paired[j] = true;
		nxt[0][v].pop_back(), nxt[1][v].pop_back();
	}
	return swaps;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 288 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 288 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 288 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 0 ms 212 KB Output is correct
24 Correct 0 ms 288 KB Output is correct
25 Correct 0 ms 212 KB Output is correct
26 Correct 0 ms 212 KB Output is correct
27 Correct 0 ms 212 KB Output is correct
28 Correct 0 ms 212 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 0 ms 212 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 0 ms 212 KB Output is correct
35 Correct 0 ms 288 KB Output is correct
36 Correct 0 ms 292 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 288 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 288 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 292 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 0 ms 284 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 3 ms 1108 KB Output is correct
21 Correct 3 ms 1108 KB Output is correct
22 Correct 25 ms 9524 KB Output is correct
23 Correct 21 ms 9488 KB Output is correct
24 Correct 26 ms 9400 KB Output is correct
25 Correct 25 ms 9428 KB Output is correct
26 Correct 25 ms 9560 KB Output is correct
27 Correct 20 ms 9408 KB Output is correct
28 Correct 21 ms 9420 KB Output is correct
29 Correct 22 ms 9512 KB Output is correct
30 Correct 22 ms 9500 KB Output is correct
31 Correct 28 ms 9516 KB Output is correct
32 Correct 23 ms 9496 KB Output is correct
33 Correct 21 ms 9248 KB Output is correct
34 Correct 22 ms 9480 KB Output is correct
35 Correct 0 ms 292 KB Output is correct
36 Correct 0 ms 212 KB Output is correct
37 Correct 22 ms 9496 KB Output is correct
38 Correct 21 ms 9504 KB Output is correct
39 Correct 34 ms 9496 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 288 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 56 ms 14752 KB Output is correct
6 Correct 27 ms 9988 KB Output is correct
7 Correct 55 ms 14748 KB Output is correct
8 Correct 35 ms 9452 KB Output is correct
9 Correct 43 ms 14796 KB Output is correct
10 Correct 36 ms 11668 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 288 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 288 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 0 ms 212 KB Output is correct
24 Correct 0 ms 288 KB Output is correct
25 Correct 0 ms 212 KB Output is correct
26 Correct 0 ms 212 KB Output is correct
27 Correct 0 ms 212 KB Output is correct
28 Correct 0 ms 212 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 0 ms 212 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 0 ms 212 KB Output is correct
35 Correct 0 ms 288 KB Output is correct
36 Correct 0 ms 292 KB Output is correct
37 Correct 1 ms 212 KB Output is correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 1 ms 212 KB Output is correct
41 Correct 1 ms 340 KB Output is correct
42 Correct 1 ms 340 KB Output is correct
43 Correct 1 ms 340 KB Output is correct
44 Correct 1 ms 340 KB Output is correct
45 Correct 1 ms 340 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 1 ms 340 KB Output is correct
48 Correct 1 ms 340 KB Output is correct
49 Correct 1 ms 296 KB Output is correct
50 Correct 1 ms 340 KB Output is correct
51 Correct 1 ms 340 KB Output is correct
52 Correct 1 ms 420 KB Output is correct

Subtask #6
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 288 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 288 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 0 ms 212 KB Output is correct
23 Correct 0 ms 212 KB Output is correct
24 Correct 0 ms 288 KB Output is correct
25 Correct 0 ms 212 KB Output is correct
26 Correct 0 ms 212 KB Output is correct
27 Correct 0 ms 212 KB Output is correct
28 Correct 0 ms 212 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 0 ms 212 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 0 ms 212 KB Output is correct
35 Correct 0 ms 288 KB Output is correct
36 Correct 0 ms 292 KB Output is correct
37 Correct 1 ms 212 KB Output is correct
38 Correct 0 ms 212 KB Output is correct
39 Correct 0 ms 212 KB Output is correct
40 Correct 0 ms 288 KB Output is correct
41 Correct 1 ms 212 KB Output is correct
42 Correct 1 ms 212 KB Output is correct
43 Correct 0 ms 212 KB Output is correct
44 Correct 0 ms 292 KB Output is correct
45 Correct 0 ms 212 KB Output is correct
46 Correct 1 ms 212 KB Output is correct
47 Correct 0 ms 284 KB Output is correct
48 Correct 0 ms 212 KB Output is correct
49 Correct 0 ms 212 KB Output is correct
50 Correct 0 ms 212 KB Output is correct
51 Correct 0 ms 212 KB Output is correct
52 Correct 1 ms 340 KB Output is correct
53 Correct 1 ms 340 KB Output is correct
54 Correct 3 ms 1108 KB Output is correct
55 Correct 3 ms 1108 KB Output is correct
56 Correct 25 ms 9524 KB Output is correct
57 Correct 21 ms 9488 KB Output is correct
58 Correct 26 ms 9400 KB Output is correct
59 Correct 25 ms 9428 KB Output is correct
60 Correct 25 ms 9560 KB Output is correct
61 Correct 20 ms 9408 KB Output is correct
62 Correct 21 ms 9420 KB Output is correct
63 Correct 22 ms 9512 KB Output is correct
64 Correct 22 ms 9500 KB Output is correct
65 Correct 28 ms 9516 KB Output is correct
66 Correct 23 ms 9496 KB Output is correct
67 Correct 21 ms 9248 KB Output is correct
68 Correct 22 ms 9480 KB Output is correct
69 Correct 0 ms 292 KB Output is correct
70 Correct 0 ms 212 KB Output is correct
71 Correct 22 ms 9496 KB Output is correct
72 Correct 21 ms 9504 KB Output is correct
73 Correct 34 ms 9496 KB Output is correct
74 Correct 0 ms 288 KB Output is correct
75 Correct 0 ms 212 KB Output is correct
76 Correct 0 ms 212 KB Output is correct
77 Correct 1 ms 212 KB Output is correct
78 Correct 56 ms 14752 KB Output is correct
79 Correct 27 ms 9988 KB Output is correct
80 Correct 55 ms 14748 KB Output is correct
81 Correct 35 ms 9452 KB Output is correct
82 Correct 43 ms 14796 KB Output is correct
83 Correct 36 ms 11668 KB Output is correct
84 Correct 1 ms 212 KB Output is correct
85 Correct 1 ms 212 KB Output is correct
86 Correct 1 ms 212 KB Output is correct
87 Correct 1 ms 212 KB Output is correct
88 Correct 1 ms 340 KB Output is correct
89 Correct 1 ms 340 KB Output is correct
90 Correct 1 ms 340 KB Output is correct
91 Correct 1 ms 340 KB Output is correct
92 Correct 1 ms 340 KB Output is correct
93 Correct 1 ms 340 KB Output is correct
94 Correct 1 ms 340 KB Output is correct
95 Correct 1 ms 340 KB Output is correct
96 Correct 1 ms 296 KB Output is correct
97 Correct 1 ms 340 KB Output is correct
98 Correct 1 ms 340 KB Output is correct
99 Correct 1 ms 420 KB Output is correct
100 Correct 1 ms 340 KB Output is correct
101 Correct 6 ms 1584 KB Output is correct
102 Correct 4 ms 1236 KB Output is correct
103 Correct 56 ms 14860 KB Output is correct
104 Correct 48 ms 14820 KB Output is correct
105 Correct 54 ms 12068 KB Output is correct
106 Correct 40 ms 14848 KB Output is correct
107 Correct 39 ms 10144 KB Output is correct
108 Correct 32 ms 10488 KB Output is correct
109 Correct 24 ms 9752 KB Output is correct
110 Correct 22 ms 9480 KB Output is correct
111 Correct 54 ms 14088 KB Output is correct
112 Correct 53 ms 13352 KB Output is correct
113 Correct 32 ms 10136 KB Output is correct
114 Correct 41 ms 14756 KB Output is correct
115 Correct 41 ms 14824 KB Output is correct