oj.uz

답안 #285745

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
285745 2020-08-29T14:24:19 Z williamMBDK Arranging Shoes (IOI19_shoes) C++14
65 / 100
 296 ms 29036 KB 
#include<bits/stdc++.h>
#define int long long
#include "shoes.h"
using namespace std;
int N;
struct BIT{
	int N;
	vector<int> arr;
	BIT(int N){
		this->N = N;
		arr = vector<int> (N);
	}
	int q(int idx){
		int s = 0;
		while(idx > 0){
			s += arr[idx];
			idx -= (idx & (-idx));
		}
		return s;
	}
	void u(int idx, int val){
		while(idx < N){
			arr[idx] += val;
			idx += (idx & (-idx));
		}
	}
	
};
int count_swaps_perm(vector<signed>& s, vector<int>& indices, vector<int>& perm) {
	BIT bit (N + 1);
	map<int,pair<int,vector<int>>> mp;
	for(int i = 0; i < N; i++){
		mp[s[i]].second.push_back(i);
		bit.u(i + 1, i);
		if(i < N - 1) bit.u(i + 2, -i);
	}
	int res = 0;
	for(int i = 0; i < N / 2; i++){
		int idx1 = indices[perm[i]];
		res += bit.q(idx1 + 1);
		if(idx1 < N - 1) bit.u(idx1 + 2, -1);
		int idx2 = mp[s[idx1] * -1].second[mp[s[idx1] * -1].first++];
		res += bit.q(idx2 + 1);
		if(idx2 < N - 1) bit.u(idx2 + 2,-1);
	}
	return res;
}

int rec(vector<signed>& s, vector<int>& indices, vector<int>& perm, vector<bool>& used, int idx){
	if(idx == N / 2){
		return count_swaps_perm(s, indices, perm);
	}
	int res = LLONG_MAX;
	for(int i = 0; i < N / 2; i++){
		if(used[i]) continue;
		perm[idx] = i;
		used[i] = 1;
		res = min(res, rec(s, indices, perm, used, idx + 1));
		used[i] = 0;
		perm[idx] = -1;
	}
	return res;
}

int count_swaps_brute(vector<signed> s, vector<int> indices){
	vector<bool> used (N / 2);
	vector<int> perm (N / 2);
	return rec(s, indices, perm, used, 0); 
}
int count_swaps_fast(vector<signed> s, vector<int> indices){
	vector<int> temp (N / 2);
	for(int i = 0; i < N / 2; i++) temp[i] = i; 
	return count_swaps_perm(s, indices, temp);
}
int count_swaps(vector<signed> s){
	N = s.size();
	vector<int> indices;
	for(int i = 0; i < N; i++){
		if(s[i] < 0) indices.push_back(i);
	}
	if(N <= 16) return count_swaps_brute(s, indices);
	else return count_swaps_fast(s, indices);
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 1 ms 256 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 1 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 1 ms 256 KB Output is correct
6 Correct 1 ms 256 KB Output is correct
7 Correct 0 ms 256 KB Output is correct
8 Correct 1 ms 256 KB Output is correct
9 Correct 1 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 1 ms 256 KB Output is correct
12 Correct 1 ms 256 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 256 KB Output is correct
15 Correct 1 ms 256 KB Output is correct
16 Correct 1 ms 256 KB Output is correct
17 Correct 1 ms 372 KB Output is correct
18 Correct 1 ms 256 KB Output is correct
19 Correct 1 ms 256 KB Output is correct
20 Correct 1 ms 256 KB Output is correct
21 Correct 1 ms 256 KB Output is correct
22 Correct 1 ms 256 KB Output is correct
23 Correct 1 ms 256 KB Output is correct
24 Correct 2 ms 256 KB Output is correct
25 Correct 11 ms 256 KB Output is correct
26 Correct 90 ms 256 KB Output is correct
27 Correct 90 ms 364 KB Output is correct
28 Correct 93 ms 256 KB Output is correct
29 Correct 59 ms 368 KB Output is correct
30 Correct 63 ms 256 KB Output is correct
31 Correct 85 ms 256 KB Output is correct
32 Correct 74 ms 256 KB Output is correct
33 Correct 80 ms 256 KB Output is correct
34 Correct 96 ms 364 KB Output is correct
35 Correct 74 ms 256 KB Output is correct
36 Correct 97 ms 256 KB Output is correct

Subtask #3
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 1 ms 256 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 1 ms 256 KB Output is correct
7 Correct 1 ms 256 KB Output is correct
8 Correct 1 ms 256 KB Output is correct
9 Correct 1 ms 256 KB Output is correct
10 Correct 1 ms 256 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 1 ms 256 KB Output is correct
13 Correct 52 ms 256 KB Output is correct
14 Correct 1 ms 256 KB Output is correct
15 Correct 1 ms 256 KB Output is correct
16 Correct 1 ms 256 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 6 ms 1280 KB Output is correct
21 Correct 6 ms 1408 KB Output is correct
22 Correct 57 ms 9836 KB Output is correct
23 Correct 53 ms 9452 KB Output is correct
24 Correct 56 ms 9580 KB Output is correct
25 Correct 52 ms 9452 KB Output is correct
26 Correct 53 ms 9452 KB Output is correct
27 Correct 49 ms 9580 KB Output is correct
28 Correct 50 ms 9456 KB Output is correct
29 Correct 57 ms 9472 KB Output is correct
30 Correct 56 ms 9452 KB Output is correct
31 Correct 53 ms 9708 KB Output is correct
32 Correct 50 ms 9452 KB Output is correct
33 Correct 48 ms 9580 KB Output is correct
34 Correct 51 ms 9456 KB Output is correct
35 Correct 0 ms 256 KB Output is correct
36 Correct 1 ms 256 KB Output is correct
37 Correct 50 ms 9452 KB Output is correct
38 Correct 49 ms 9452 KB Output is correct
39 Correct 49 ms 9452 KB Output is correct

Subtask #4
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 1 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 292 ms 29036 KB Output is correct
6 Correct 128 ms 11116 KB Output is correct
7 Correct 296 ms 29036 KB Output is correct
8 Correct 55 ms 9580 KB Output is correct
9 Correct 279 ms 29004 KB Output is correct
10 Correct 209 ms 18668 KB Output is correct

Subtask #5
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 1 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 1 ms 256 KB Output is correct
6 Correct 1 ms 256 KB Output is correct
7 Correct 0 ms 256 KB Output is correct
8 Correct 1 ms 256 KB Output is correct
9 Correct 1 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 1 ms 256 KB Output is correct
12 Correct 1 ms 256 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 256 KB Output is correct
15 Correct 1 ms 256 KB Output is correct
16 Correct 1 ms 256 KB Output is correct
17 Correct 1 ms 372 KB Output is correct
18 Correct 1 ms 256 KB Output is correct
19 Correct 1 ms 256 KB Output is correct
20 Correct 1 ms 256 KB Output is correct
21 Correct 1 ms 256 KB Output is correct
22 Correct 1 ms 256 KB Output is correct
23 Correct 1 ms 256 KB Output is correct
24 Correct 2 ms 256 KB Output is correct
25 Correct 11 ms 256 KB Output is correct
26 Correct 90 ms 256 KB Output is correct
27 Correct 90 ms 364 KB Output is correct
28 Correct 93 ms 256 KB Output is correct
29 Correct 59 ms 368 KB Output is correct
30 Correct 63 ms 256 KB Output is correct
31 Correct 85 ms 256 KB Output is correct
32 Correct 74 ms 256 KB Output is correct
33 Correct 80 ms 256 KB Output is correct
34 Correct 96 ms 364 KB Output is correct
35 Correct 74 ms 256 KB Output is correct
36 Correct 97 ms 256 KB Output is correct
37 Incorrect 0 ms 256 KB Output isn't correct
38 Halted 0 ms 0 KB -

Subtask #6
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 1 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 1 ms 256 KB Output is correct
6 Correct 1 ms 256 KB Output is correct
7 Correct 0 ms 256 KB Output is correct
8 Correct 1 ms 256 KB Output is correct
9 Correct 1 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 1 ms 256 KB Output is correct
12 Correct 1 ms 256 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 256 KB Output is correct
15 Correct 1 ms 256 KB Output is correct
16 Correct 1 ms 256 KB Output is correct
17 Correct 1 ms 372 KB Output is correct
18 Correct 1 ms 256 KB Output is correct
19 Correct 1 ms 256 KB Output is correct
20 Correct 1 ms 256 KB Output is correct
21 Correct 1 ms 256 KB Output is correct
22 Correct 1 ms 256 KB Output is correct
23 Correct 1 ms 256 KB Output is correct
24 Correct 2 ms 256 KB Output is correct
25 Correct 11 ms 256 KB Output is correct
26 Correct 90 ms 256 KB Output is correct
27 Correct 90 ms 364 KB Output is correct
28 Correct 93 ms 256 KB Output is correct
29 Correct 59 ms 368 KB Output is correct
30 Correct 63 ms 256 KB Output is correct
31 Correct 85 ms 256 KB Output is correct
32 Correct 74 ms 256 KB Output is correct
33 Correct 80 ms 256 KB Output is correct
34 Correct 96 ms 364 KB Output is correct
35 Correct 74 ms 256 KB Output is correct
36 Correct 97 ms 256 KB Output is correct
37 Correct 1 ms 384 KB Output is correct
38 Correct 1 ms 256 KB Output is correct
39 Correct 0 ms 256 KB Output is correct
40 Correct 1 ms 256 KB Output is correct
41 Correct 1 ms 256 KB Output is correct
42 Correct 1 ms 256 KB Output is correct
43 Correct 1 ms 256 KB Output is correct
44 Correct 1 ms 256 KB Output is correct
45 Correct 0 ms 256 KB Output is correct
46 Correct 1 ms 256 KB Output is correct
47 Correct 52 ms 256 KB Output is correct
48 Correct 1 ms 256 KB Output is correct
49 Correct 1 ms 256 KB Output is correct
50 Correct 1 ms 256 KB Output is correct
51 Correct 1 ms 384 KB Output is correct
52 Correct 1 ms 384 KB Output is correct
53 Correct 1 ms 384 KB Output is correct
54 Correct 6 ms 1280 KB Output is correct
55 Correct 6 ms 1408 KB Output is correct
56 Correct 57 ms 9836 KB Output is correct
57 Correct 53 ms 9452 KB Output is correct
58 Correct 56 ms 9580 KB Output is correct
59 Correct 52 ms 9452 KB Output is correct
60 Correct 53 ms 9452 KB Output is correct
61 Correct 49 ms 9580 KB Output is correct
62 Correct 50 ms 9456 KB Output is correct
63 Correct 57 ms 9472 KB Output is correct
64 Correct 56 ms 9452 KB Output is correct
65 Correct 53 ms 9708 KB Output is correct
66 Correct 50 ms 9452 KB Output is correct
67 Correct 48 ms 9580 KB Output is correct
68 Correct 51 ms 9456 KB Output is correct
69 Correct 0 ms 256 KB Output is correct
70 Correct 1 ms 256 KB Output is correct
71 Correct 50 ms 9452 KB Output is correct
72 Correct 49 ms 9452 KB Output is correct
73 Correct 49 ms 9452 KB Output is correct
74 Correct 1 ms 256 KB Output is correct
75 Correct 1 ms 256 KB Output is correct
76 Correct 0 ms 256 KB Output is correct
77 Correct 1 ms 256 KB Output is correct
78 Correct 292 ms 29036 KB Output is correct
79 Correct 128 ms 11116 KB Output is correct
80 Correct 296 ms 29036 KB Output is correct
81 Correct 55 ms 9580 KB Output is correct
82 Correct 279 ms 29004 KB Output is correct
83 Correct 209 ms 18668 KB Output is correct
84 Incorrect 0 ms 256 KB Output isn't correct
85 Halted 0 ms 0 KB -