oj.uz

Submission #306312

# Submission time Handle Problem Language Result Execution time Memory
306312 2020-09-25T07:58:22 Z tengiz05 Arranging Shoes (IOI19_shoes) C++17
100 / 100
 138 ms 17012 KB 
#include "shoes.h"
#include <bits/stdc++.h>
using namespace std;
struct segtree{
	vector<int> t;
	int sz;
	void init(int n){
		sz = 1;
		while(sz < n)sz *= 2;
		t.assign(sz*2, 1);
		for(int i=sz-1; i>0; i--)t[i] = t[i*2] + t[i*2+1];
	}
	void add(int pos, int val){
		pos += sz;
		t[pos] += val;
		for(;pos > 1; pos>>=1)t[pos>>1] = t[pos] + t[pos^1];
	}
	int query(int l, int r){
		if(l > r)return 0;
		l += sz, r += sz;
		int sum = 0;
		for(;l <= r; l>>=1, r>>=1){
			if(l%2 == 1)sum += t[l], l++;
			if(r%2 == 0)sum += t[r], r--;
		}return sum;
	}
};
long long count_swaps(vector<int> a) {
	int n = a.size()/2;
	long long ans = 0;
	
	vector<vector<int>> pos(n+1);
	vector<vector<int>> neg(n+1);
	
	for(int i=0;i<n*2;i++){
		if(a[i] > 0)
			pos[a[i]].push_back(i);
		else 
			neg[abs(a[i])].push_back(i);
	}
	for(int i=1;i<=n;i++){
		sort(pos[i].begin(), pos[i].end());
		sort(neg[i].begin(), neg[i].end());
	}
	vector<pair<int, int>> need;
	for(int i=1;i<=n;i++){
		for(int j=0;j<pos[i].size();j++){
			int r = pos[i][j];
			int l = neg[i][j];
			if(l > r)swap(l, r),ans++;
			need.push_back({l, r});
		}
	}
	sort(need.begin(), need.end());
	segtree seg;
	seg.init(n*2);
	
	for(auto X : need){
		int l = X.first;
		int r = X.second;
		ans += (long long)seg.query(l+1, r-1);
	//	cout << l << ' ' << r << ';' << seg.query(l+1, r-1) << '\n';
		seg.add(l, -1);
		seg.add(r, -1);
	}
	//cout << "; ans = " << ans << '\n';
	return ans;
}

/*

3
-2 -2 -2 2 2 2

3
-2 2 2 -2 -2 2

2 
2 1 -1 -2

*/

Compilation message

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:47:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |   for(int j=0;j<pos[i].size();j++){
      |               ~^~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 0 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 1 ms 256 KB Output is correct
6 Correct 0 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 1 ms 384 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 1 ms 256 KB Output is correct
13 Correct 0 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 0 ms 256 KB Output is correct
18 Correct 1 ms 256 KB Output is correct
19 Correct 1 ms 256 KB Output is correct
20 Correct 0 ms 256 KB Output is correct
21 Correct 1 ms 288 KB Output is correct
22 Correct 1 ms 256 KB Output is correct
23 Correct 0 ms 256 KB Output is correct
24 Correct 0 ms 256 KB Output is correct
25 Correct 1 ms 256 KB Output is correct
26 Correct 1 ms 256 KB Output is correct
27 Correct 0 ms 256 KB Output is correct
28 Correct 1 ms 256 KB Output is correct
29 Correct 0 ms 256 KB Output is correct
30 Correct 1 ms 256 KB Output is correct
31 Correct 0 ms 256 KB Output is correct
32 Correct 0 ms 256 KB Output is correct
33 Correct 1 ms 256 KB Output is correct
34 Correct 0 ms 256 KB Output is correct
35 Correct 1 ms 256 KB Output is correct
36 Correct 1 ms 256 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 0 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 0 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 0 ms 256 KB Output is correct
13 Correct 0 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 1664 KB Output is correct
21 Correct 6 ms 1664 KB Output is correct
22 Correct 56 ms 11540 KB Output is correct
23 Correct 49 ms 11624 KB Output is correct
24 Correct 54 ms 11624 KB Output is correct
25 Correct 53 ms 11372 KB Output is correct
26 Correct 59 ms 11624 KB Output is correct
27 Correct 47 ms 11368 KB Output is correct
28 Correct 56 ms 11628 KB Output is correct
29 Correct 54 ms 11628 KB Output is correct
30 Correct 53 ms 11628 KB Output is correct
31 Correct 58 ms 11904 KB Output is correct
32 Correct 54 ms 11632 KB Output is correct
33 Correct 54 ms 11372 KB Output is correct
34 Correct 54 ms 11628 KB Output is correct
35 Correct 1 ms 256 KB Output is correct
36 Correct 1 ms 256 KB Output is correct
37 Correct 55 ms 11628 KB Output is correct
38 Correct 54 ms 11760 KB Output is correct
39 Correct 54 ms 11628 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 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 111 ms 15852 KB Output is correct
6 Correct 75 ms 12268 KB Output is correct
7 Correct 102 ms 17004 KB Output is correct
8 Correct 61 ms 11764 KB Output is correct
9 Correct 102 ms 17004 KB Output is correct
10 Correct 97 ms 13932 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 0 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 1 ms 256 KB Output is correct
6 Correct 0 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 1 ms 384 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 1 ms 256 KB Output is correct
13 Correct 0 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 0 ms 256 KB Output is correct
18 Correct 1 ms 256 KB Output is correct
19 Correct 1 ms 256 KB Output is correct
20 Correct 0 ms 256 KB Output is correct
21 Correct 1 ms 288 KB Output is correct
22 Correct 1 ms 256 KB Output is correct
23 Correct 0 ms 256 KB Output is correct
24 Correct 0 ms 256 KB Output is correct
25 Correct 1 ms 256 KB Output is correct
26 Correct 1 ms 256 KB Output is correct
27 Correct 0 ms 256 KB Output is correct
28 Correct 1 ms 256 KB Output is correct
29 Correct 0 ms 256 KB Output is correct
30 Correct 1 ms 256 KB Output is correct
31 Correct 0 ms 256 KB Output is correct
32 Correct 0 ms 256 KB Output is correct
33 Correct 1 ms 256 KB Output is correct
34 Correct 0 ms 256 KB Output is correct
35 Correct 1 ms 256 KB Output is correct
36 Correct 1 ms 256 KB Output is correct
37 Correct 0 ms 256 KB Output is correct
38 Correct 1 ms 256 KB Output is correct
39 Correct 1 ms 384 KB Output is correct
40 Correct 1 ms 384 KB Output is correct
41 Correct 1 ms 512 KB Output is correct
42 Correct 1 ms 512 KB Output is correct
43 Correct 1 ms 512 KB Output is correct
44 Correct 1 ms 512 KB Output is correct
45 Correct 1 ms 384 KB Output is correct
46 Correct 1 ms 384 KB Output is correct
47 Correct 1 ms 384 KB Output is correct
48 Correct 1 ms 384 KB Output is correct
49 Correct 1 ms 384 KB Output is correct
50 Correct 1 ms 384 KB Output is correct
51 Correct 1 ms 384 KB Output is correct
52 Correct 1 ms 512 KB Output is correct

Subtask #6
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 0 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 1 ms 256 KB Output is correct
6 Correct 0 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 1 ms 384 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 1 ms 256 KB Output is correct
13 Correct 0 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 0 ms 256 KB Output is correct
18 Correct 1 ms 256 KB Output is correct
19 Correct 1 ms 256 KB Output is correct
20 Correct 0 ms 256 KB Output is correct
21 Correct 1 ms 288 KB Output is correct
22 Correct 1 ms 256 KB Output is correct
23 Correct 0 ms 256 KB Output is correct
24 Correct 0 ms 256 KB Output is correct
25 Correct 1 ms 256 KB Output is correct
26 Correct 1 ms 256 KB Output is correct
27 Correct 0 ms 256 KB Output is correct
28 Correct 1 ms 256 KB Output is correct
29 Correct 0 ms 256 KB Output is correct
30 Correct 1 ms 256 KB Output is correct
31 Correct 0 ms 256 KB Output is correct
32 Correct 0 ms 256 KB Output is correct
33 Correct 1 ms 256 KB Output is correct
34 Correct 0 ms 256 KB Output is correct
35 Correct 1 ms 256 KB Output is correct
36 Correct 1 ms 256 KB Output is correct
37 Correct 0 ms 256 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 0 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 0 ms 256 KB Output is correct
45 Correct 1 ms 256 KB Output is correct
46 Correct 0 ms 256 KB Output is correct
47 Correct 0 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 1664 KB Output is correct
55 Correct 6 ms 1664 KB Output is correct
56 Correct 56 ms 11540 KB Output is correct
57 Correct 49 ms 11624 KB Output is correct
58 Correct 54 ms 11624 KB Output is correct
59 Correct 53 ms 11372 KB Output is correct
60 Correct 59 ms 11624 KB Output is correct
61 Correct 47 ms 11368 KB Output is correct
62 Correct 56 ms 11628 KB Output is correct
63 Correct 54 ms 11628 KB Output is correct
64 Correct 53 ms 11628 KB Output is correct
65 Correct 58 ms 11904 KB Output is correct
66 Correct 54 ms 11632 KB Output is correct
67 Correct 54 ms 11372 KB Output is correct
68 Correct 54 ms 11628 KB Output is correct
69 Correct 1 ms 256 KB Output is correct
70 Correct 1 ms 256 KB Output is correct
71 Correct 55 ms 11628 KB Output is correct
72 Correct 54 ms 11760 KB Output is correct
73 Correct 54 ms 11628 KB Output is correct
74 Correct 0 ms 256 KB Output is correct
75 Correct 0 ms 256 KB Output is correct
76 Correct 1 ms 256 KB Output is correct
77 Correct 0 ms 256 KB Output is correct
78 Correct 111 ms 15852 KB Output is correct
79 Correct 75 ms 12268 KB Output is correct
80 Correct 102 ms 17004 KB Output is correct
81 Correct 61 ms 11764 KB Output is correct
82 Correct 102 ms 17004 KB Output is correct
83 Correct 97 ms 13932 KB Output is correct
84 Correct 0 ms 256 KB Output is correct
85 Correct 1 ms 256 KB Output is correct
86 Correct 1 ms 384 KB Output is correct
87 Correct 1 ms 384 KB Output is correct
88 Correct 1 ms 512 KB Output is correct
89 Correct 1 ms 512 KB Output is correct
90 Correct 1 ms 512 KB Output is correct
91 Correct 1 ms 512 KB Output is correct
92 Correct 1 ms 384 KB Output is correct
93 Correct 1 ms 384 KB Output is correct
94 Correct 1 ms 384 KB Output is correct
95 Correct 1 ms 384 KB Output is correct
96 Correct 1 ms 384 KB Output is correct
97 Correct 1 ms 384 KB Output is correct
98 Correct 1 ms 384 KB Output is correct
99 Correct 1 ms 512 KB Output is correct
100 Correct 1 ms 512 KB Output is correct
101 Correct 9 ms 2048 KB Output is correct
102 Correct 8 ms 1664 KB Output is correct
103 Correct 138 ms 17012 KB Output is correct
104 Correct 109 ms 17008 KB Output is correct
105 Correct 114 ms 14316 KB Output is correct
106 Correct 110 ms 17004 KB Output is correct
107 Correct 78 ms 12524 KB Output is correct
108 Correct 81 ms 12792 KB Output is correct
109 Correct 63 ms 12012 KB Output is correct
110 Correct 55 ms 11752 KB Output is correct
111 Correct 98 ms 16364 KB Output is correct
112 Correct 121 ms 15728 KB Output is correct
113 Correct 85 ms 12396 KB Output is correct
114 Correct 99 ms 17004 KB Output is correct
115 Correct 101 ms 17004 KB Output is correct