oj.uz

Submission #832149

# Submission time Handle Problem Language Result Execution time Memory
832149 2023-08-21T03:39:26 Z tranxuanbach Arranging Shoes (IOI19_shoes) C++17
100 / 100
 51 ms 16400 KB 
#include "shoes.h"

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

#define isz(a) ((signed)a.size())

using ll = long long;

const int N = 2e5 + 5;

int n;
int a[N];

namespace subtask6{
	bool check(){
		return true;
	}

	struct fenwick_tree{
		int fen[N];

		void update(int i, int x){
			for (; i < N; i += i & -i){
				fen[i] += x;
			}
		}

		int query(int i){
			int ans = 0;
			for (; i > 0; i -= i & -i){
				ans += fen[i];
			}
			return ans;
		}

		int query(int l, int r){
			return query(r) - query(l - 1);
		}
	} fen;

	vector <int> pos[N];
	int final_pos[N];

	ll solve(){
		for (int i = 1; i <= 2 * n; i++){
			pos[a[i] + n].emplace_back(i);
		}
		for (int val = 0; val <= 2 * n; val++){
			reverse(pos[val].begin(), pos[val].end());
		}
		int cnt = 0;
		for (int i = 1; i <= 2 * n; i++){
			if (final_pos[i] != 0){
				continue;
			}
			int val1 = a[i], val2 = -a[i];
			int j = pos[val2 + n].back();
			pos[val1 + n].pop_back();
			pos[val2 + n].pop_back();
			final_pos[i] = cnt * 2 + (val1 < 0 ? 1 : 2);
			final_pos[j] = cnt * 2 + (val2 < 0 ? 1 : 2);
			cnt++;
		}
		ll ans = 0;
		for (int i = 1; i <= 2 * n; i++){
			ans += fen.query(final_pos[i] + 1, 2 * n);
			fen.update(final_pos[i], 1);
		}
		return ans;
	}
}

ll count_swaps(vector <int> _a){
	n = isz(_a) / 2;
	for (int i = 1; i <= 2 * n; i++){
		a[i] = _a[i - 1];
	}

	if (subtask6::check()){
		return subtask6::solve();
	}
}

Compilation message

shoes.cpp: In function 'll count_swaps(std::vector<int>)':
shoes.cpp:83:1: warning: control reaches end of non-void function [-Wreturn-type]
   83 | }
      | ^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 2 ms 4948 KB Output is correct
11 Correct 2 ms 4948 KB Output is correct
12 Correct 3 ms 5012 KB Output is correct
13 Correct 2 ms 4948 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct
15 Correct 2 ms 4948 KB Output is correct
16 Correct 2 ms 5036 KB Output is correct
17 Correct 2 ms 4948 KB Output is correct
18 Correct 2 ms 4948 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 2 ms 4948 KB Output is correct
22 Correct 2 ms 4948 KB Output is correct
23 Correct 3 ms 4948 KB Output is correct
24 Correct 3 ms 4948 KB Output is correct
25 Correct 2 ms 4980 KB Output is correct
26 Correct 2 ms 4948 KB Output is correct
27 Correct 2 ms 4948 KB Output is correct
28 Correct 2 ms 4948 KB Output is correct
29 Correct 3 ms 5012 KB Output is correct
30 Correct 2 ms 4948 KB Output is correct
31 Correct 2 ms 5008 KB Output is correct
32 Correct 2 ms 4948 KB Output is correct
33 Correct 2 ms 4948 KB Output is correct
34 Correct 2 ms 4948 KB Output is correct
35 Correct 2 ms 4948 KB Output is correct
36 Correct 2 ms 4948 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 2 ms 4948 KB Output is correct
11 Correct 2 ms 4984 KB Output is correct
12 Correct 2 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct
15 Correct 3 ms 5016 KB Output is correct
16 Correct 3 ms 5016 KB Output is correct
17 Correct 2 ms 4948 KB Output is correct
18 Correct 3 ms 5060 KB Output is correct
19 Correct 2 ms 5076 KB Output is correct
20 Correct 5 ms 5664 KB Output is correct
21 Correct 5 ms 5588 KB Output is correct
22 Correct 26 ms 11024 KB Output is correct
23 Correct 25 ms 11104 KB Output is correct
24 Correct 29 ms 11144 KB Output is correct
25 Correct 25 ms 10840 KB Output is correct
26 Correct 28 ms 11172 KB Output is correct
27 Correct 24 ms 10896 KB Output is correct
28 Correct 25 ms 11032 KB Output is correct
29 Correct 24 ms 11024 KB Output is correct
30 Correct 25 ms 11028 KB Output is correct
31 Correct 27 ms 11040 KB Output is correct
32 Correct 24 ms 11036 KB Output is correct
33 Correct 24 ms 10840 KB Output is correct
34 Correct 24 ms 11040 KB Output is correct
35 Correct 4 ms 5012 KB Output is correct
36 Correct 3 ms 4948 KB Output is correct
37 Correct 24 ms 11020 KB Output is correct
38 Correct 23 ms 11028 KB Output is correct
39 Correct 24 ms 11020 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 41 ms 15056 KB Output is correct
6 Correct 35 ms 11624 KB Output is correct
7 Correct 41 ms 16332 KB Output is correct
8 Correct 32 ms 11068 KB Output is correct
9 Correct 40 ms 16384 KB Output is correct
10 Correct 41 ms 13308 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 2 ms 4948 KB Output is correct
11 Correct 2 ms 4948 KB Output is correct
12 Correct 3 ms 5012 KB Output is correct
13 Correct 2 ms 4948 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct
15 Correct 2 ms 4948 KB Output is correct
16 Correct 2 ms 5036 KB Output is correct
17 Correct 2 ms 4948 KB Output is correct
18 Correct 2 ms 4948 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 2 ms 4948 KB Output is correct
22 Correct 2 ms 4948 KB Output is correct
23 Correct 3 ms 4948 KB Output is correct
24 Correct 3 ms 4948 KB Output is correct
25 Correct 2 ms 4980 KB Output is correct
26 Correct 2 ms 4948 KB Output is correct
27 Correct 2 ms 4948 KB Output is correct
28 Correct 2 ms 4948 KB Output is correct
29 Correct 3 ms 5012 KB Output is correct
30 Correct 2 ms 4948 KB Output is correct
31 Correct 2 ms 5008 KB Output is correct
32 Correct 2 ms 4948 KB Output is correct
33 Correct 2 ms 4948 KB Output is correct
34 Correct 2 ms 4948 KB Output is correct
35 Correct 2 ms 4948 KB Output is correct
36 Correct 2 ms 4948 KB Output is correct
37 Correct 3 ms 4948 KB Output is correct
38 Correct 3 ms 5012 KB Output is correct
39 Correct 3 ms 5012 KB Output is correct
40 Correct 2 ms 5012 KB Output is correct
41 Correct 3 ms 5020 KB Output is correct
42 Correct 4 ms 5076 KB Output is correct
43 Correct 3 ms 5076 KB Output is correct
44 Correct 3 ms 5060 KB Output is correct
45 Correct 3 ms 5020 KB Output is correct
46 Correct 3 ms 5016 KB Output is correct
47 Correct 5 ms 5076 KB Output is correct
48 Correct 3 ms 5020 KB Output is correct
49 Correct 4 ms 5076 KB Output is correct
50 Correct 3 ms 5076 KB Output is correct
51 Correct 5 ms 5076 KB Output is correct
52 Correct 4 ms 5076 KB Output is correct

Subtask #6
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 2 ms 4948 KB Output is correct
3 Correct 2 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 2 ms 4948 KB Output is correct
6 Correct 2 ms 4948 KB Output is correct
7 Correct 2 ms 4948 KB Output is correct
8 Correct 2 ms 4948 KB Output is correct
9 Correct 2 ms 4948 KB Output is correct
10 Correct 2 ms 4948 KB Output is correct
11 Correct 2 ms 4948 KB Output is correct
12 Correct 3 ms 5012 KB Output is correct
13 Correct 2 ms 4948 KB Output is correct
14 Correct 2 ms 4948 KB Output is correct
15 Correct 2 ms 4948 KB Output is correct
16 Correct 2 ms 5036 KB Output is correct
17 Correct 2 ms 4948 KB Output is correct
18 Correct 2 ms 4948 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 2 ms 4948 KB Output is correct
22 Correct 2 ms 4948 KB Output is correct
23 Correct 3 ms 4948 KB Output is correct
24 Correct 3 ms 4948 KB Output is correct
25 Correct 2 ms 4980 KB Output is correct
26 Correct 2 ms 4948 KB Output is correct
27 Correct 2 ms 4948 KB Output is correct
28 Correct 2 ms 4948 KB Output is correct
29 Correct 3 ms 5012 KB Output is correct
30 Correct 2 ms 4948 KB Output is correct
31 Correct 2 ms 5008 KB Output is correct
32 Correct 2 ms 4948 KB Output is correct
33 Correct 2 ms 4948 KB Output is correct
34 Correct 2 ms 4948 KB Output is correct
35 Correct 2 ms 4948 KB Output is correct
36 Correct 2 ms 4948 KB Output is correct
37 Correct 2 ms 4948 KB Output is correct
38 Correct 2 ms 4948 KB Output is correct
39 Correct 2 ms 4948 KB Output is correct
40 Correct 2 ms 4948 KB Output is correct
41 Correct 3 ms 4948 KB Output is correct
42 Correct 2 ms 4948 KB Output is correct
43 Correct 2 ms 4948 KB Output is correct
44 Correct 2 ms 4948 KB Output is correct
45 Correct 2 ms 4984 KB Output is correct
46 Correct 2 ms 4948 KB Output is correct
47 Correct 3 ms 4948 KB Output is correct
48 Correct 2 ms 4948 KB Output is correct
49 Correct 3 ms 5016 KB Output is correct
50 Correct 3 ms 5016 KB Output is correct
51 Correct 2 ms 4948 KB Output is correct
52 Correct 3 ms 5060 KB Output is correct
53 Correct 2 ms 5076 KB Output is correct
54 Correct 5 ms 5664 KB Output is correct
55 Correct 5 ms 5588 KB Output is correct
56 Correct 26 ms 11024 KB Output is correct
57 Correct 25 ms 11104 KB Output is correct
58 Correct 29 ms 11144 KB Output is correct
59 Correct 25 ms 10840 KB Output is correct
60 Correct 28 ms 11172 KB Output is correct
61 Correct 24 ms 10896 KB Output is correct
62 Correct 25 ms 11032 KB Output is correct
63 Correct 24 ms 11024 KB Output is correct
64 Correct 25 ms 11028 KB Output is correct
65 Correct 27 ms 11040 KB Output is correct
66 Correct 24 ms 11036 KB Output is correct
67 Correct 24 ms 10840 KB Output is correct
68 Correct 24 ms 11040 KB Output is correct
69 Correct 4 ms 5012 KB Output is correct
70 Correct 3 ms 4948 KB Output is correct
71 Correct 24 ms 11020 KB Output is correct
72 Correct 23 ms 11028 KB Output is correct
73 Correct 24 ms 11020 KB Output is correct
74 Correct 2 ms 4948 KB Output is correct
75 Correct 2 ms 4948 KB Output is correct
76 Correct 2 ms 4948 KB Output is correct
77 Correct 3 ms 4948 KB Output is correct
78 Correct 41 ms 15056 KB Output is correct
79 Correct 35 ms 11624 KB Output is correct
80 Correct 41 ms 16332 KB Output is correct
81 Correct 32 ms 11068 KB Output is correct
82 Correct 40 ms 16384 KB Output is correct
83 Correct 41 ms 13308 KB Output is correct
84 Correct 3 ms 4948 KB Output is correct
85 Correct 3 ms 5012 KB Output is correct
86 Correct 3 ms 5012 KB Output is correct
87 Correct 2 ms 5012 KB Output is correct
88 Correct 3 ms 5020 KB Output is correct
89 Correct 4 ms 5076 KB Output is correct
90 Correct 3 ms 5076 KB Output is correct
91 Correct 3 ms 5060 KB Output is correct
92 Correct 3 ms 5020 KB Output is correct
93 Correct 3 ms 5016 KB Output is correct
94 Correct 5 ms 5076 KB Output is correct
95 Correct 3 ms 5020 KB Output is correct
96 Correct 4 ms 5076 KB Output is correct
97 Correct 3 ms 5076 KB Output is correct
98 Correct 5 ms 5076 KB Output is correct
99 Correct 4 ms 5076 KB Output is correct
100 Correct 4 ms 5076 KB Output is correct
101 Correct 8 ms 5972 KB Output is correct
102 Correct 8 ms 5660 KB Output is correct
103 Correct 50 ms 16400 KB Output is correct
104 Correct 41 ms 16320 KB Output is correct
105 Correct 51 ms 13644 KB Output is correct
106 Correct 38 ms 16332 KB Output is correct
107 Correct 39 ms 11736 KB Output is correct
108 Correct 36 ms 12040 KB Output is correct
109 Correct 26 ms 11416 KB Output is correct
110 Correct 27 ms 11016 KB Output is correct
111 Correct 39 ms 15636 KB Output is correct
112 Correct 48 ms 14924 KB Output is correct
113 Correct 37 ms 11732 KB Output is correct
114 Correct 42 ms 16368 KB Output is correct
115 Correct 38 ms 16396 KB Output is correct