oj.uz

Submission #792024

# Submission time Handle Problem Language Result Execution time Memory
792024 2023-07-24T13:59:31 Z APROHACK Arranging Shoes (IOI19_shoes) C++17
100 / 100
 36 ms 11304 KB 
#include "shoes.h"
#include <bits/stdc++.h>
#define ll long long
#define ff first
#define ss second
#define pb push_back
using namespace std;
ll nxt[200005][2];
bool past[200005] ;
int n;
int find_next(int k, int positive){
	if(!past[k])return k;
	if(!past[nxt[k][positive]])return nxt[k][positive];
	return nxt[k][positive] = find_next(nxt[k][positive], positive); // siempre tiene que existir.
}

ll bit[200005];
void update(int pos, int val){
	pos ++ ;
	for(; pos <= n ; pos += pos&(-pos)){
		bit[pos] += val;
	}
}
ll query(int pos){
	ll ans = 0;
	pos ++ ;
	for(; pos > 0 ; pos -= pos&(-pos)){
		ans += bit[pos];
	}
	return ans;
}

ll getAns(int l, int r){

	if(l > r)return 0;
	if(l > 0)return query(r) - query(l-1);
	else return query(r);
}



long long count_swaps(std::vector<int> s) {
	n = s.size();
	for(int i = 0 ; i <=n+2 ; i ++)bit[i] = 0;
	ll siguiente[n][2]; // 0 negative 1 positive
	for(int i = 0 ; i < n ; i ++)update(i, 1);
	for(int i = 1 ; i <= n ; i ++){
		siguiente[i][0] = -1;
		siguiente[i][1] = -1;
		nxt[i][0] = -1;
		nxt[i][1] = -1;
	}
	
	for(int i = n-1 ; i >= 0 ; i--){
		nxt[i][0] = siguiente[abs(s[i])][0];
		nxt[i][1] = siguiente[abs(s[i])][1];
		if(s[i] > 0)siguiente[abs(s[i])][1] = i;
		else siguiente[abs(s[i])][0] = i;
	}
	
	memset(past, false, sizeof past);
	ll ans = 0;
	for(int i = 0 ; i < n ; i ++){
		if(past[i] )continue;
		ll busca = 1;
		if(s[i] > 0)busca = 0;
		//cout << "buscando para " << i ;
		ll k = find_next(nxt[i][busca], busca);
		//cout << " desde " << k << endl;
		ans += getAns(i+1, k-1);
		//cout << "sumed " << getAns(i+1, k-1);
		if(busca == 0)ans ++;
		past[k] = true;
		past[i] = true;
		update(k, -1);
		update(i, -1);
	}
	
	return ans;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 468 KB Output is correct
2 Correct 0 ms 468 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 468 KB Output is correct
2 Correct 0 ms 468 KB Output is correct
3 Correct 0 ms 468 KB Output is correct
4 Correct 0 ms 468 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 0 ms 468 KB Output is correct
7 Correct 0 ms 468 KB Output is correct
8 Correct 0 ms 468 KB Output is correct
9 Correct 0 ms 468 KB Output is correct
10 Correct 0 ms 468 KB Output is correct
11 Correct 0 ms 468 KB Output is correct
12 Correct 0 ms 468 KB Output is correct
13 Correct 0 ms 468 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 0 ms 468 KB Output is correct
16 Correct 0 ms 468 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 0 ms 468 KB Output is correct
19 Correct 1 ms 468 KB Output is correct
20 Correct 1 ms 468 KB Output is correct
21 Correct 0 ms 468 KB Output is correct
22 Correct 0 ms 468 KB Output is correct
23 Correct 1 ms 468 KB Output is correct
24 Correct 1 ms 468 KB Output is correct
25 Correct 1 ms 468 KB Output is correct
26 Correct 0 ms 468 KB Output is correct
27 Correct 0 ms 468 KB Output is correct
28 Correct 0 ms 468 KB Output is correct
29 Correct 1 ms 468 KB Output is correct
30 Correct 1 ms 468 KB Output is correct
31 Correct 0 ms 468 KB Output is correct
32 Correct 0 ms 468 KB Output is correct
33 Correct 0 ms 468 KB Output is correct
34 Correct 0 ms 468 KB Output is correct
35 Correct 0 ms 468 KB Output is correct
36 Correct 1 ms 468 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 468 KB Output is correct
2 Correct 0 ms 468 KB Output is correct
3 Correct 0 ms 468 KB Output is correct
4 Correct 0 ms 468 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 1 ms 468 KB Output is correct
7 Correct 0 ms 468 KB Output is correct
8 Correct 0 ms 468 KB Output is correct
9 Correct 0 ms 468 KB Output is correct
10 Correct 0 ms 468 KB Output is correct
11 Correct 0 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 0 ms 468 KB Output is correct
14 Correct 0 ms 468 KB Output is correct
15 Correct 0 ms 468 KB Output is correct
16 Correct 0 ms 468 KB Output is correct
17 Correct 0 ms 468 KB Output is correct
18 Correct 1 ms 596 KB Output is correct
19 Correct 1 ms 596 KB Output is correct
20 Correct 3 ms 1364 KB Output is correct
21 Correct 3 ms 1364 KB Output is correct
22 Correct 29 ms 9812 KB Output is correct
23 Correct 22 ms 11056 KB Output is correct
24 Correct 29 ms 11068 KB Output is correct
25 Correct 24 ms 10964 KB Output is correct
26 Correct 28 ms 11084 KB Output is correct
27 Correct 21 ms 10884 KB Output is correct
28 Correct 30 ms 11304 KB Output is correct
29 Correct 25 ms 11132 KB Output is correct
30 Correct 25 ms 11068 KB Output is correct
31 Correct 29 ms 11084 KB Output is correct
32 Correct 26 ms 11068 KB Output is correct
33 Correct 24 ms 10964 KB Output is correct
34 Correct 25 ms 11060 KB Output is correct
35 Correct 1 ms 468 KB Output is correct
36 Correct 1 ms 468 KB Output is correct
37 Correct 25 ms 11064 KB Output is correct
38 Correct 26 ms 11084 KB Output is correct
39 Correct 24 ms 11056 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 468 KB Output is correct
2 Correct 0 ms 468 KB Output is correct
3 Correct 0 ms 468 KB Output is correct
4 Correct 0 ms 468 KB Output is correct
5 Correct 26 ms 9784 KB Output is correct
6 Correct 27 ms 11084 KB Output is correct
7 Correct 27 ms 11060 KB Output is correct
8 Correct 25 ms 11048 KB Output is correct
9 Correct 27 ms 11060 KB Output is correct
10 Correct 26 ms 11056 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 468 KB Output is correct
2 Correct 0 ms 468 KB Output is correct
3 Correct 0 ms 468 KB Output is correct
4 Correct 0 ms 468 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 0 ms 468 KB Output is correct
7 Correct 0 ms 468 KB Output is correct
8 Correct 0 ms 468 KB Output is correct
9 Correct 0 ms 468 KB Output is correct
10 Correct 0 ms 468 KB Output is correct
11 Correct 0 ms 468 KB Output is correct
12 Correct 0 ms 468 KB Output is correct
13 Correct 0 ms 468 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 0 ms 468 KB Output is correct
16 Correct 0 ms 468 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 0 ms 468 KB Output is correct
19 Correct 1 ms 468 KB Output is correct
20 Correct 1 ms 468 KB Output is correct
21 Correct 0 ms 468 KB Output is correct
22 Correct 0 ms 468 KB Output is correct
23 Correct 1 ms 468 KB Output is correct
24 Correct 1 ms 468 KB Output is correct
25 Correct 1 ms 468 KB Output is correct
26 Correct 0 ms 468 KB Output is correct
27 Correct 0 ms 468 KB Output is correct
28 Correct 0 ms 468 KB Output is correct
29 Correct 1 ms 468 KB Output is correct
30 Correct 1 ms 468 KB Output is correct
31 Correct 0 ms 468 KB Output is correct
32 Correct 0 ms 468 KB Output is correct
33 Correct 0 ms 468 KB Output is correct
34 Correct 0 ms 468 KB Output is correct
35 Correct 0 ms 468 KB Output is correct
36 Correct 1 ms 468 KB Output is correct
37 Correct 1 ms 468 KB Output is correct
38 Correct 0 ms 468 KB Output is correct
39 Correct 1 ms 468 KB Output is correct
40 Correct 1 ms 440 KB Output is correct
41 Correct 1 ms 468 KB Output is correct
42 Correct 1 ms 596 KB Output is correct
43 Correct 1 ms 596 KB Output is correct
44 Correct 1 ms 596 KB Output is correct
45 Correct 1 ms 596 KB Output is correct
46 Correct 1 ms 596 KB Output is correct
47 Correct 1 ms 596 KB Output is correct
48 Correct 1 ms 596 KB Output is correct
49 Correct 1 ms 596 KB Output is correct
50 Correct 1 ms 596 KB Output is correct
51 Correct 1 ms 596 KB Output is correct
52 Correct 1 ms 596 KB Output is correct

Subtask #6
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 468 KB Output is correct
2 Correct 0 ms 468 KB Output is correct
3 Correct 0 ms 468 KB Output is correct
4 Correct 0 ms 468 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 0 ms 468 KB Output is correct
7 Correct 0 ms 468 KB Output is correct
8 Correct 0 ms 468 KB Output is correct
9 Correct 0 ms 468 KB Output is correct
10 Correct 0 ms 468 KB Output is correct
11 Correct 0 ms 468 KB Output is correct
12 Correct 0 ms 468 KB Output is correct
13 Correct 0 ms 468 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 0 ms 468 KB Output is correct
16 Correct 0 ms 468 KB Output is correct
17 Correct 1 ms 468 KB Output is correct
18 Correct 0 ms 468 KB Output is correct
19 Correct 1 ms 468 KB Output is correct
20 Correct 1 ms 468 KB Output is correct
21 Correct 0 ms 468 KB Output is correct
22 Correct 0 ms 468 KB Output is correct
23 Correct 1 ms 468 KB Output is correct
24 Correct 1 ms 468 KB Output is correct
25 Correct 1 ms 468 KB Output is correct
26 Correct 0 ms 468 KB Output is correct
27 Correct 0 ms 468 KB Output is correct
28 Correct 0 ms 468 KB Output is correct
29 Correct 1 ms 468 KB Output is correct
30 Correct 1 ms 468 KB Output is correct
31 Correct 0 ms 468 KB Output is correct
32 Correct 0 ms 468 KB Output is correct
33 Correct 0 ms 468 KB Output is correct
34 Correct 0 ms 468 KB Output is correct
35 Correct 0 ms 468 KB Output is correct
36 Correct 1 ms 468 KB Output is correct
37 Correct 0 ms 468 KB Output is correct
38 Correct 0 ms 468 KB Output is correct
39 Correct 1 ms 468 KB Output is correct
40 Correct 1 ms 468 KB Output is correct
41 Correct 0 ms 468 KB Output is correct
42 Correct 0 ms 468 KB Output is correct
43 Correct 0 ms 468 KB Output is correct
44 Correct 0 ms 468 KB Output is correct
45 Correct 0 ms 468 KB Output is correct
46 Correct 1 ms 468 KB Output is correct
47 Correct 0 ms 468 KB Output is correct
48 Correct 0 ms 468 KB Output is correct
49 Correct 0 ms 468 KB Output is correct
50 Correct 0 ms 468 KB Output is correct
51 Correct 0 ms 468 KB Output is correct
52 Correct 1 ms 596 KB Output is correct
53 Correct 1 ms 596 KB Output is correct
54 Correct 3 ms 1364 KB Output is correct
55 Correct 3 ms 1364 KB Output is correct
56 Correct 29 ms 9812 KB Output is correct
57 Correct 22 ms 11056 KB Output is correct
58 Correct 29 ms 11068 KB Output is correct
59 Correct 24 ms 10964 KB Output is correct
60 Correct 28 ms 11084 KB Output is correct
61 Correct 21 ms 10884 KB Output is correct
62 Correct 30 ms 11304 KB Output is correct
63 Correct 25 ms 11132 KB Output is correct
64 Correct 25 ms 11068 KB Output is correct
65 Correct 29 ms 11084 KB Output is correct
66 Correct 26 ms 11068 KB Output is correct
67 Correct 24 ms 10964 KB Output is correct
68 Correct 25 ms 11060 KB Output is correct
69 Correct 1 ms 468 KB Output is correct
70 Correct 1 ms 468 KB Output is correct
71 Correct 25 ms 11064 KB Output is correct
72 Correct 26 ms 11084 KB Output is correct
73 Correct 24 ms 11056 KB Output is correct
74 Correct 0 ms 468 KB Output is correct
75 Correct 0 ms 468 KB Output is correct
76 Correct 0 ms 468 KB Output is correct
77 Correct 0 ms 468 KB Output is correct
78 Correct 26 ms 9784 KB Output is correct
79 Correct 27 ms 11084 KB Output is correct
80 Correct 27 ms 11060 KB Output is correct
81 Correct 25 ms 11048 KB Output is correct
82 Correct 27 ms 11060 KB Output is correct
83 Correct 26 ms 11056 KB Output is correct
84 Correct 1 ms 468 KB Output is correct
85 Correct 0 ms 468 KB Output is correct
86 Correct 1 ms 468 KB Output is correct
87 Correct 1 ms 440 KB Output is correct
88 Correct 1 ms 468 KB Output is correct
89 Correct 1 ms 596 KB Output is correct
90 Correct 1 ms 596 KB Output is correct
91 Correct 1 ms 596 KB Output is correct
92 Correct 1 ms 596 KB Output is correct
93 Correct 1 ms 596 KB Output is correct
94 Correct 1 ms 596 KB Output is correct
95 Correct 1 ms 596 KB Output is correct
96 Correct 1 ms 596 KB Output is correct
97 Correct 1 ms 596 KB Output is correct
98 Correct 1 ms 596 KB Output is correct
99 Correct 1 ms 596 KB Output is correct
100 Correct 1 ms 596 KB Output is correct
101 Correct 3 ms 1492 KB Output is correct
102 Correct 4 ms 1492 KB Output is correct
103 Correct 36 ms 11064 KB Output is correct
104 Correct 22 ms 11068 KB Output is correct
105 Correct 27 ms 11136 KB Output is correct
106 Correct 26 ms 11092 KB Output is correct
107 Correct 28 ms 11044 KB Output is correct
108 Correct 23 ms 11068 KB Output is correct
109 Correct 25 ms 11048 KB Output is correct
110 Correct 25 ms 11060 KB Output is correct
111 Correct 26 ms 11084 KB Output is correct
112 Correct 27 ms 11084 KB Output is correct
113 Correct 27 ms 11056 KB Output is correct
114 Correct 25 ms 11084 KB Output is correct
115 Correct 26 ms 11056 KB Output is correct