oj.uz

Submission #799123

# Submission time Handle Problem Language Result Execution time Memory
799123 2023-07-31T09:57:22 Z I_Love_EliskaM_ Arranging Shoes (IOI19_shoes) C++14
100 / 100
 477 ms 148716 KB 
using namespace std;
#include <bits/stdc++.h>
//#include "shoes.h"
using ll = long long;

struct BIT {
    vector<int> bit;  // binary indexed tree
    int n;
 
    BIT(int n) {
        this->n = n;
        bit.assign(n, 0);
    }
 
    BIT(vector<int> a) : BIT(a.size()) {
        for (size_t i = 0; i < a.size(); i++)
            add(i, a[i]);
    }
 
    int sum(int r) {
        int ret = 0;
        for (; r >= 0; r = (r & (r + 1)) - 1)
            ret += bit[r];
        return ret;
    }
 
    int sum(int l, int r) {
        return sum(r) - sum(l - 1);
    }
 
    void add(int idx, int delta) {
        for (; idx < n; idx = idx | (idx + 1))
            bit[idx] += delta;
    }
};

ll count_swaps(vector<int>s) {

	int n=s.size()/2;
	/*
	if (n==1) {
		return s[0]>0;
	}
	int foo=1; int x=abs(s[0]);
	for (int i=1; i<2*n; ++i) {
		foo&=abs(s[i])==x;
	}
	if (foo) {
		int j=0;
		ll ans=0;
		for (int i=0; i<2*n; ++i) {
			if (s[i]<0) {
				ans+=abs(i-2*j);
				++j;
			}
		}
		return ans;
	}
	foo=1;
	for (int i=0; i<n; ++i) {
		foo&= ( s[i]<0 && (abs(s[i])==abs(s[i+n])) && s[i+n]>0 );
	}
	if (foo) {
		return 1ll*n*(n-1)/2;
	} */

	ll ans=0;

	BIT ft(2*n+10);
	for (int i=0; i<2*n; ++i) { ft.add(i,i); ft.add(i+1,-i); }
	vector<int> vis(2*n,0);
	
	//for (int i=0; i<2*n; ++i) cout<<ft.sum(0,i)<<' '; cout<<'\n';
	
	map<int,queue<int>> m;
	for (int i=0; i<2*n; ++i) m[s[i]].push(i);
	for (int i=0; i<2*n; ++i) {
		if (vis[i]) continue;
		vis[i]=1;
		int x=s[i];
		m[x].pop();
		int j=m[-x].front();
		m[-x].pop();
		int y=ft.sum(0,i);
		int z=ft.sum(0,j);
		ans+=z-y-1;
		ans+=s[i]>0;
		vis[j]=1;

		//cout<<i<<' '<<j<<' '<<y<<' '<<z<<' '<<ans<<'\n';

		ft.add(i,1);
		ft.add(j,-1);
		//for (int i=0; i<2*n; ++i) cout<<ft.sum(0,i)<<' '; cout<<'\n';
	}

	return ans;	
}

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 212 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 212 KB Output is correct
3 Correct 0 ms 300 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 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 300 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 300 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 292 KB Output is correct
21 Correct 1 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 212 KB Output is correct
25 Correct 1 ms 300 KB Output is correct
26 Correct 1 ms 212 KB Output is correct
27 Correct 0 ms 212 KB Output is correct
28 Correct 1 ms 212 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 1 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 1 ms 212 KB Output is correct
35 Correct 1 ms 212 KB Output is correct
36 Correct 0 ms 300 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 212 KB Output is correct
3 Correct 1 ms 300 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 304 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 0 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 1 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 308 KB Output is correct
20 Correct 3 ms 696 KB Output is correct
21 Correct 3 ms 724 KB Output is correct
22 Correct 29 ms 5428 KB Output is correct
23 Correct 27 ms 5428 KB Output is correct
24 Correct 29 ms 5460 KB Output is correct
25 Correct 24 ms 5304 KB Output is correct
26 Correct 29 ms 5420 KB Output is correct
27 Correct 22 ms 5304 KB Output is correct
28 Correct 25 ms 5524 KB Output is correct
29 Correct 24 ms 5424 KB Output is correct
30 Correct 24 ms 5424 KB Output is correct
31 Correct 28 ms 5432 KB Output is correct
32 Correct 25 ms 5420 KB Output is correct
33 Correct 23 ms 5300 KB Output is correct
34 Correct 24 ms 5460 KB Output is correct
35 Correct 0 ms 212 KB Output is correct
36 Correct 0 ms 212 KB Output is correct
37 Correct 25 ms 5428 KB Output is correct
38 Correct 24 ms 5420 KB Output is correct
39 Correct 24 ms 5452 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 304 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 300 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 417 ms 148652 KB Output is correct
6 Correct 99 ms 17200 KB Output is correct
7 Correct 408 ms 148576 KB Output is correct
8 Correct 27 ms 5420 KB Output is correct
9 Correct 406 ms 148640 KB Output is correct
10 Correct 277 ms 76624 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 212 KB Output is correct
3 Correct 0 ms 300 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 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 300 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 300 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 292 KB Output is correct
21 Correct 1 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 212 KB Output is correct
25 Correct 1 ms 300 KB Output is correct
26 Correct 1 ms 212 KB Output is correct
27 Correct 0 ms 212 KB Output is correct
28 Correct 1 ms 212 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 1 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 1 ms 212 KB Output is correct
35 Correct 1 ms 212 KB Output is correct
36 Correct 0 ms 300 KB Output is correct
37 Correct 0 ms 296 KB Output is correct
38 Correct 1 ms 340 KB Output is correct
39 Correct 1 ms 340 KB Output is correct
40 Correct 1 ms 596 KB Output is correct
41 Correct 2 ms 1712 KB Output is correct
42 Correct 2 ms 1748 KB Output is correct
43 Correct 2 ms 1592 KB Output is correct
44 Correct 2 ms 1364 KB Output is correct
45 Correct 2 ms 1236 KB Output is correct
46 Correct 1 ms 1072 KB Output is correct
47 Correct 2 ms 944 KB Output is correct
48 Correct 1 ms 692 KB Output is correct
49 Correct 1 ms 596 KB Output is correct
50 Correct 1 ms 340 KB Output is correct
51 Correct 1 ms 340 KB Output is correct
52 Correct 2 ms 1748 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 212 KB Output is correct
3 Correct 0 ms 300 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 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 300 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 300 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 292 KB Output is correct
21 Correct 1 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 212 KB Output is correct
25 Correct 1 ms 300 KB Output is correct
26 Correct 1 ms 212 KB Output is correct
27 Correct 0 ms 212 KB Output is correct
28 Correct 1 ms 212 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 1 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 1 ms 212 KB Output is correct
35 Correct 1 ms 212 KB Output is correct
36 Correct 0 ms 300 KB Output is correct
37 Correct 1 ms 300 KB Output is correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 0 ms 304 KB Output is correct
40 Correct 1 ms 212 KB Output is correct
41 Correct 0 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 1 ms 212 KB Output is correct
45 Correct 0 ms 212 KB Output is correct
46 Correct 1 ms 212 KB Output is correct
47 Correct 1 ms 212 KB Output is correct
48 Correct 0 ms 212 KB Output is correct
49 Correct 1 ms 212 KB Output is correct
50 Correct 1 ms 212 KB Output is correct
51 Correct 1 ms 212 KB Output is correct
52 Correct 1 ms 340 KB Output is correct
53 Correct 1 ms 308 KB Output is correct
54 Correct 3 ms 696 KB Output is correct
55 Correct 3 ms 724 KB Output is correct
56 Correct 29 ms 5428 KB Output is correct
57 Correct 27 ms 5428 KB Output is correct
58 Correct 29 ms 5460 KB Output is correct
59 Correct 24 ms 5304 KB Output is correct
60 Correct 29 ms 5420 KB Output is correct
61 Correct 22 ms 5304 KB Output is correct
62 Correct 25 ms 5524 KB Output is correct
63 Correct 24 ms 5424 KB Output is correct
64 Correct 24 ms 5424 KB Output is correct
65 Correct 28 ms 5432 KB Output is correct
66 Correct 25 ms 5420 KB Output is correct
67 Correct 23 ms 5300 KB Output is correct
68 Correct 24 ms 5460 KB Output is correct
69 Correct 0 ms 212 KB Output is correct
70 Correct 0 ms 212 KB Output is correct
71 Correct 25 ms 5428 KB Output is correct
72 Correct 24 ms 5420 KB Output is correct
73 Correct 24 ms 5452 KB Output is correct
74 Correct 0 ms 304 KB Output is correct
75 Correct 0 ms 212 KB Output is correct
76 Correct 0 ms 300 KB Output is correct
77 Correct 0 ms 212 KB Output is correct
78 Correct 417 ms 148652 KB Output is correct
79 Correct 99 ms 17200 KB Output is correct
80 Correct 408 ms 148576 KB Output is correct
81 Correct 27 ms 5420 KB Output is correct
82 Correct 406 ms 148640 KB Output is correct
83 Correct 277 ms 76624 KB Output is correct
84 Correct 0 ms 296 KB Output is correct
85 Correct 1 ms 340 KB Output is correct
86 Correct 1 ms 340 KB Output is correct
87 Correct 1 ms 596 KB Output is correct
88 Correct 2 ms 1712 KB Output is correct
89 Correct 2 ms 1748 KB Output is correct
90 Correct 2 ms 1592 KB Output is correct
91 Correct 2 ms 1364 KB Output is correct
92 Correct 2 ms 1236 KB Output is correct
93 Correct 1 ms 1072 KB Output is correct
94 Correct 2 ms 944 KB Output is correct
95 Correct 1 ms 692 KB Output is correct
96 Correct 1 ms 596 KB Output is correct
97 Correct 1 ms 340 KB Output is correct
98 Correct 1 ms 340 KB Output is correct
99 Correct 2 ms 1748 KB Output is correct
100 Correct 2 ms 1748 KB Output is correct
101 Correct 20 ms 13612 KB Output is correct
102 Correct 9 ms 3540 KB Output is correct
103 Correct 477 ms 148704 KB Output is correct
104 Correct 426 ms 148716 KB Output is correct
105 Correct 358 ms 86440 KB Output is correct
106 Correct 400 ms 148700 KB Output is correct
107 Correct 118 ms 20684 KB Output is correct
108 Correct 177 ms 36584 KB Output is correct
109 Correct 26 ms 5420 KB Output is correct
110 Correct 25 ms 5460 KB Output is correct
111 Correct 373 ms 132696 KB Output is correct
112 Correct 401 ms 116740 KB Output is correct
113 Correct 119 ms 22416 KB Output is correct
114 Correct 412 ms 148684 KB Output is correct
115 Correct 410 ms 148684 KB Output is correct