#include "shoes.h"
#include <cassert>
#include <iostream>
#include <cstring>
#include <vector>
#include <algorithm>
using namespace std;
#define TRACE(x) cerr << #x << ' ' << x << endl
#define FOR(i, a, b) for (int i = (a); i < (b); i++)
#define REP(i, n) FOR(i, 0, n)
#define _ << " " <<
#define pb push_back
const int MAXN = 200100;
struct Fenwick {
int p[MAXN];
void clear() {
memset(p, 0, sizeof p);
}
void add(int x) {
for (int i = x; i > 0; i -= i &- i)
p[i]++;
}
int get(int x) {
int ret = 0;
for (int i = x; i < MAXN; i += i &- i)
ret += p[i];
return ret;
}
}loga;
long long get_inv(vector <int> pos) {
long long inv = 0;
loga.clear();
REP(i, pos.size()) {
inv += loga.get(pos[i] + 1);
loga.add(pos[i] + 1);
}
return inv;
}
long long solve(vector <int> p, int start, int T) {
vector <int> pos;
vector <int> v[MAXN];
int n = p.size();
pos.resize(n);
int t = start;
REP(i, n) {
if (p[i]/abs(p[i]) == T) {
v[max(p[i], -p[i])].pb(t);
pos[i] = t;
t += 2;
}
}
REP(i, MAXN) reverse(v[i].begin(), v[i].end());
REP(i, n) {
if (p[i]/abs(p[i]) != T) {
int x = v[max(p[i], -p[i])].back();
v[max(p[i], -p[i])].pop_back();
if (p[i] < 0) x--;
else x++;
pos[i] = x;
}
}
return get_inv(pos);
}
long long f(vector <int> p) {
int n = p.size() / 2;
vector <int> r;
vector <int> v[MAXN];
REP(i, 2 * n) {
int a = p[i] + n;
int b = p[i];
if (p[i] < 0) {
a = abs(p[i]);
b = a + n;
}
if (v[b].empty()) {
v[a].pb(i);
r.pb(abs(p[i]));
} else v[b].pop_back();
}
REP(i, MAXN) assert(v[i].empty());
REP(i, 2 * n) {
int x = p[i] + n;
if (p[i] < 0) x = abs(p[i]);
v[x].pb(i);
}
REP(i, MAXN) reverse(v[i].begin(), v[i].end());
vector <int> pos;
pos.resize(p.size());
int t = 0;
REP(i, n) {
pos[v[r[i]].back()] = t++;
v[r[i]].pop_back();
pos[v[r[i] + n].back()] = t++;
v[r[i] + n].pop_back();
}
return get_inv(pos);
}
long long count_swaps(std::vector<int> s) {
return min(min(solve(s, 0, -1), solve(s, 1, 1)), f(s));
}
Compilation message
shoes.cpp: In function 'long long int get_inv(std::vector<int>)':
shoes.cpp:10:42: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
10 | #define FOR(i, a, b) for (int i = (a); i < (b); i++)
| ^
shoes.cpp:11:19: note: in expansion of macro 'FOR'
11 | #define REP(i, n) FOR(i, 0, n)
| ^~~
shoes.cpp:42:3: note: in expansion of macro 'REP'
42 | REP(i, pos.size()) {
| ^~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
6 ms |
5708 KB |
Output is correct |
2 |
Correct |
7 ms |
5708 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
6 ms |
5708 KB |
Output is correct |
2 |
Correct |
7 ms |
5708 KB |
Output is correct |
3 |
Correct |
7 ms |
5708 KB |
Output is correct |
4 |
Correct |
6 ms |
5708 KB |
Output is correct |
5 |
Correct |
7 ms |
5708 KB |
Output is correct |
6 |
Correct |
6 ms |
5708 KB |
Output is correct |
7 |
Correct |
7 ms |
5708 KB |
Output is correct |
8 |
Correct |
7 ms |
5708 KB |
Output is correct |
9 |
Correct |
7 ms |
5708 KB |
Output is correct |
10 |
Correct |
6 ms |
5708 KB |
Output is correct |
11 |
Correct |
7 ms |
5784 KB |
Output is correct |
12 |
Correct |
6 ms |
5708 KB |
Output is correct |
13 |
Correct |
6 ms |
5708 KB |
Output is correct |
14 |
Correct |
7 ms |
5708 KB |
Output is correct |
15 |
Correct |
7 ms |
5680 KB |
Output is correct |
16 |
Correct |
7 ms |
5708 KB |
Output is correct |
17 |
Correct |
7 ms |
5776 KB |
Output is correct |
18 |
Correct |
6 ms |
5708 KB |
Output is correct |
19 |
Correct |
8 ms |
5708 KB |
Output is correct |
20 |
Correct |
7 ms |
5708 KB |
Output is correct |
21 |
Correct |
7 ms |
5708 KB |
Output is correct |
22 |
Correct |
6 ms |
5708 KB |
Output is correct |
23 |
Correct |
6 ms |
5708 KB |
Output is correct |
24 |
Correct |
7 ms |
5772 KB |
Output is correct |
25 |
Correct |
6 ms |
5708 KB |
Output is correct |
26 |
Correct |
6 ms |
5656 KB |
Output is correct |
27 |
Correct |
7 ms |
5708 KB |
Output is correct |
28 |
Correct |
6 ms |
5680 KB |
Output is correct |
29 |
Correct |
6 ms |
5776 KB |
Output is correct |
30 |
Correct |
6 ms |
5708 KB |
Output is correct |
31 |
Correct |
6 ms |
5708 KB |
Output is correct |
32 |
Correct |
8 ms |
5708 KB |
Output is correct |
33 |
Correct |
6 ms |
5760 KB |
Output is correct |
34 |
Correct |
8 ms |
5708 KB |
Output is correct |
35 |
Correct |
7 ms |
5708 KB |
Output is correct |
36 |
Correct |
11 ms |
5756 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
6 ms |
5708 KB |
Output is correct |
2 |
Correct |
7 ms |
5708 KB |
Output is correct |
3 |
Correct |
6 ms |
5708 KB |
Output is correct |
4 |
Correct |
6 ms |
5708 KB |
Output is correct |
5 |
Correct |
6 ms |
5676 KB |
Output is correct |
6 |
Correct |
6 ms |
5708 KB |
Output is correct |
7 |
Correct |
7 ms |
5708 KB |
Output is correct |
8 |
Correct |
6 ms |
5708 KB |
Output is correct |
9 |
Correct |
6 ms |
5708 KB |
Output is correct |
10 |
Correct |
6 ms |
5776 KB |
Output is correct |
11 |
Correct |
6 ms |
5708 KB |
Output is correct |
12 |
Correct |
6 ms |
5776 KB |
Output is correct |
13 |
Correct |
7 ms |
5708 KB |
Output is correct |
14 |
Correct |
6 ms |
5708 KB |
Output is correct |
15 |
Correct |
6 ms |
5708 KB |
Output is correct |
16 |
Correct |
6 ms |
5784 KB |
Output is correct |
17 |
Correct |
7 ms |
5708 KB |
Output is correct |
18 |
Correct |
7 ms |
5836 KB |
Output is correct |
19 |
Correct |
8 ms |
5836 KB |
Output is correct |
20 |
Correct |
18 ms |
6476 KB |
Output is correct |
21 |
Correct |
13 ms |
6452 KB |
Output is correct |
22 |
Correct |
73 ms |
13312 KB |
Output is correct |
23 |
Correct |
65 ms |
13568 KB |
Output is correct |
24 |
Correct |
69 ms |
13356 KB |
Output is correct |
25 |
Correct |
59 ms |
13176 KB |
Output is correct |
26 |
Correct |
70 ms |
13408 KB |
Output is correct |
27 |
Correct |
74 ms |
13148 KB |
Output is correct |
28 |
Correct |
62 ms |
13396 KB |
Output is correct |
29 |
Correct |
64 ms |
13400 KB |
Output is correct |
30 |
Correct |
62 ms |
13416 KB |
Output is correct |
31 |
Correct |
71 ms |
13388 KB |
Output is correct |
32 |
Correct |
61 ms |
13392 KB |
Output is correct |
33 |
Correct |
61 ms |
13232 KB |
Output is correct |
34 |
Correct |
66 ms |
13408 KB |
Output is correct |
35 |
Correct |
7 ms |
5708 KB |
Output is correct |
36 |
Correct |
6 ms |
5708 KB |
Output is correct |
37 |
Correct |
64 ms |
13400 KB |
Output is correct |
38 |
Correct |
63 ms |
13416 KB |
Output is correct |
39 |
Correct |
62 ms |
13396 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
6 ms |
5772 KB |
Output is correct |
2 |
Correct |
6 ms |
5708 KB |
Output is correct |
3 |
Correct |
7 ms |
5708 KB |
Output is correct |
4 |
Correct |
7 ms |
5708 KB |
Output is correct |
5 |
Correct |
131 ms |
17696 KB |
Output is correct |
6 |
Correct |
100 ms |
13880 KB |
Output is correct |
7 |
Correct |
137 ms |
17576 KB |
Output is correct |
8 |
Correct |
62 ms |
13236 KB |
Output is correct |
9 |
Correct |
129 ms |
17468 KB |
Output is correct |
10 |
Correct |
140 ms |
14400 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
6 ms |
5708 KB |
Output is correct |
2 |
Correct |
7 ms |
5708 KB |
Output is correct |
3 |
Correct |
7 ms |
5708 KB |
Output is correct |
4 |
Correct |
6 ms |
5708 KB |
Output is correct |
5 |
Correct |
7 ms |
5708 KB |
Output is correct |
6 |
Correct |
6 ms |
5708 KB |
Output is correct |
7 |
Correct |
7 ms |
5708 KB |
Output is correct |
8 |
Correct |
7 ms |
5708 KB |
Output is correct |
9 |
Correct |
7 ms |
5708 KB |
Output is correct |
10 |
Correct |
6 ms |
5708 KB |
Output is correct |
11 |
Correct |
7 ms |
5784 KB |
Output is correct |
12 |
Correct |
6 ms |
5708 KB |
Output is correct |
13 |
Correct |
6 ms |
5708 KB |
Output is correct |
14 |
Correct |
7 ms |
5708 KB |
Output is correct |
15 |
Correct |
7 ms |
5680 KB |
Output is correct |
16 |
Correct |
7 ms |
5708 KB |
Output is correct |
17 |
Correct |
7 ms |
5776 KB |
Output is correct |
18 |
Correct |
6 ms |
5708 KB |
Output is correct |
19 |
Correct |
8 ms |
5708 KB |
Output is correct |
20 |
Correct |
7 ms |
5708 KB |
Output is correct |
21 |
Correct |
7 ms |
5708 KB |
Output is correct |
22 |
Correct |
6 ms |
5708 KB |
Output is correct |
23 |
Correct |
6 ms |
5708 KB |
Output is correct |
24 |
Correct |
7 ms |
5772 KB |
Output is correct |
25 |
Correct |
6 ms |
5708 KB |
Output is correct |
26 |
Correct |
6 ms |
5656 KB |
Output is correct |
27 |
Correct |
7 ms |
5708 KB |
Output is correct |
28 |
Correct |
6 ms |
5680 KB |
Output is correct |
29 |
Correct |
6 ms |
5776 KB |
Output is correct |
30 |
Correct |
6 ms |
5708 KB |
Output is correct |
31 |
Correct |
6 ms |
5708 KB |
Output is correct |
32 |
Correct |
8 ms |
5708 KB |
Output is correct |
33 |
Correct |
6 ms |
5760 KB |
Output is correct |
34 |
Correct |
8 ms |
5708 KB |
Output is correct |
35 |
Correct |
7 ms |
5708 KB |
Output is correct |
36 |
Correct |
11 ms |
5756 KB |
Output is correct |
37 |
Correct |
6 ms |
5708 KB |
Output is correct |
38 |
Correct |
7 ms |
5708 KB |
Output is correct |
39 |
Correct |
6 ms |
5708 KB |
Output is correct |
40 |
Correct |
7 ms |
5708 KB |
Output is correct |
41 |
Correct |
7 ms |
5836 KB |
Output is correct |
42 |
Correct |
7 ms |
5836 KB |
Output is correct |
43 |
Correct |
7 ms |
5876 KB |
Output is correct |
44 |
Correct |
7 ms |
5872 KB |
Output is correct |
45 |
Correct |
9 ms |
5756 KB |
Output is correct |
46 |
Correct |
7 ms |
5836 KB |
Output is correct |
47 |
Correct |
7 ms |
5836 KB |
Output is correct |
48 |
Correct |
8 ms |
5836 KB |
Output is correct |
49 |
Correct |
8 ms |
5836 KB |
Output is correct |
50 |
Correct |
7 ms |
5836 KB |
Output is correct |
51 |
Correct |
7 ms |
5840 KB |
Output is correct |
52 |
Correct |
7 ms |
5820 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
6 ms |
5708 KB |
Output is correct |
2 |
Correct |
7 ms |
5708 KB |
Output is correct |
3 |
Correct |
7 ms |
5708 KB |
Output is correct |
4 |
Correct |
6 ms |
5708 KB |
Output is correct |
5 |
Correct |
7 ms |
5708 KB |
Output is correct |
6 |
Correct |
6 ms |
5708 KB |
Output is correct |
7 |
Correct |
7 ms |
5708 KB |
Output is correct |
8 |
Correct |
7 ms |
5708 KB |
Output is correct |
9 |
Correct |
7 ms |
5708 KB |
Output is correct |
10 |
Correct |
6 ms |
5708 KB |
Output is correct |
11 |
Correct |
7 ms |
5784 KB |
Output is correct |
12 |
Correct |
6 ms |
5708 KB |
Output is correct |
13 |
Correct |
6 ms |
5708 KB |
Output is correct |
14 |
Correct |
7 ms |
5708 KB |
Output is correct |
15 |
Correct |
7 ms |
5680 KB |
Output is correct |
16 |
Correct |
7 ms |
5708 KB |
Output is correct |
17 |
Correct |
7 ms |
5776 KB |
Output is correct |
18 |
Correct |
6 ms |
5708 KB |
Output is correct |
19 |
Correct |
8 ms |
5708 KB |
Output is correct |
20 |
Correct |
7 ms |
5708 KB |
Output is correct |
21 |
Correct |
7 ms |
5708 KB |
Output is correct |
22 |
Correct |
6 ms |
5708 KB |
Output is correct |
23 |
Correct |
6 ms |
5708 KB |
Output is correct |
24 |
Correct |
7 ms |
5772 KB |
Output is correct |
25 |
Correct |
6 ms |
5708 KB |
Output is correct |
26 |
Correct |
6 ms |
5656 KB |
Output is correct |
27 |
Correct |
7 ms |
5708 KB |
Output is correct |
28 |
Correct |
6 ms |
5680 KB |
Output is correct |
29 |
Correct |
6 ms |
5776 KB |
Output is correct |
30 |
Correct |
6 ms |
5708 KB |
Output is correct |
31 |
Correct |
6 ms |
5708 KB |
Output is correct |
32 |
Correct |
8 ms |
5708 KB |
Output is correct |
33 |
Correct |
6 ms |
5760 KB |
Output is correct |
34 |
Correct |
8 ms |
5708 KB |
Output is correct |
35 |
Correct |
7 ms |
5708 KB |
Output is correct |
36 |
Correct |
11 ms |
5756 KB |
Output is correct |
37 |
Correct |
6 ms |
5708 KB |
Output is correct |
38 |
Correct |
6 ms |
5708 KB |
Output is correct |
39 |
Correct |
6 ms |
5676 KB |
Output is correct |
40 |
Correct |
6 ms |
5708 KB |
Output is correct |
41 |
Correct |
7 ms |
5708 KB |
Output is correct |
42 |
Correct |
6 ms |
5708 KB |
Output is correct |
43 |
Correct |
6 ms |
5708 KB |
Output is correct |
44 |
Correct |
6 ms |
5776 KB |
Output is correct |
45 |
Correct |
6 ms |
5708 KB |
Output is correct |
46 |
Correct |
6 ms |
5776 KB |
Output is correct |
47 |
Correct |
7 ms |
5708 KB |
Output is correct |
48 |
Correct |
6 ms |
5708 KB |
Output is correct |
49 |
Correct |
6 ms |
5708 KB |
Output is correct |
50 |
Correct |
6 ms |
5784 KB |
Output is correct |
51 |
Correct |
7 ms |
5708 KB |
Output is correct |
52 |
Correct |
7 ms |
5836 KB |
Output is correct |
53 |
Correct |
8 ms |
5836 KB |
Output is correct |
54 |
Correct |
18 ms |
6476 KB |
Output is correct |
55 |
Correct |
13 ms |
6452 KB |
Output is correct |
56 |
Correct |
73 ms |
13312 KB |
Output is correct |
57 |
Correct |
65 ms |
13568 KB |
Output is correct |
58 |
Correct |
69 ms |
13356 KB |
Output is correct |
59 |
Correct |
59 ms |
13176 KB |
Output is correct |
60 |
Correct |
70 ms |
13408 KB |
Output is correct |
61 |
Correct |
74 ms |
13148 KB |
Output is correct |
62 |
Correct |
62 ms |
13396 KB |
Output is correct |
63 |
Correct |
64 ms |
13400 KB |
Output is correct |
64 |
Correct |
62 ms |
13416 KB |
Output is correct |
65 |
Correct |
71 ms |
13388 KB |
Output is correct |
66 |
Correct |
61 ms |
13392 KB |
Output is correct |
67 |
Correct |
61 ms |
13232 KB |
Output is correct |
68 |
Correct |
66 ms |
13408 KB |
Output is correct |
69 |
Correct |
7 ms |
5708 KB |
Output is correct |
70 |
Correct |
6 ms |
5708 KB |
Output is correct |
71 |
Correct |
64 ms |
13400 KB |
Output is correct |
72 |
Correct |
63 ms |
13416 KB |
Output is correct |
73 |
Correct |
62 ms |
13396 KB |
Output is correct |
74 |
Correct |
6 ms |
5772 KB |
Output is correct |
75 |
Correct |
6 ms |
5708 KB |
Output is correct |
76 |
Correct |
7 ms |
5708 KB |
Output is correct |
77 |
Correct |
7 ms |
5708 KB |
Output is correct |
78 |
Correct |
131 ms |
17696 KB |
Output is correct |
79 |
Correct |
100 ms |
13880 KB |
Output is correct |
80 |
Correct |
137 ms |
17576 KB |
Output is correct |
81 |
Correct |
62 ms |
13236 KB |
Output is correct |
82 |
Correct |
129 ms |
17468 KB |
Output is correct |
83 |
Correct |
140 ms |
14400 KB |
Output is correct |
84 |
Correct |
6 ms |
5708 KB |
Output is correct |
85 |
Correct |
7 ms |
5708 KB |
Output is correct |
86 |
Correct |
6 ms |
5708 KB |
Output is correct |
87 |
Correct |
7 ms |
5708 KB |
Output is correct |
88 |
Correct |
7 ms |
5836 KB |
Output is correct |
89 |
Correct |
7 ms |
5836 KB |
Output is correct |
90 |
Correct |
7 ms |
5876 KB |
Output is correct |
91 |
Correct |
7 ms |
5872 KB |
Output is correct |
92 |
Correct |
9 ms |
5756 KB |
Output is correct |
93 |
Correct |
7 ms |
5836 KB |
Output is correct |
94 |
Correct |
7 ms |
5836 KB |
Output is correct |
95 |
Correct |
8 ms |
5836 KB |
Output is correct |
96 |
Correct |
8 ms |
5836 KB |
Output is correct |
97 |
Correct |
7 ms |
5836 KB |
Output is correct |
98 |
Correct |
7 ms |
5840 KB |
Output is correct |
99 |
Correct |
7 ms |
5820 KB |
Output is correct |
100 |
Correct |
7 ms |
5836 KB |
Output is correct |
101 |
Correct |
18 ms |
6840 KB |
Output is correct |
102 |
Correct |
16 ms |
6564 KB |
Output is correct |
103 |
Correct |
169 ms |
17580 KB |
Output is correct |
104 |
Correct |
159 ms |
17556 KB |
Output is correct |
105 |
Correct |
180 ms |
14908 KB |
Output is correct |
106 |
Correct |
126 ms |
17468 KB |
Output is correct |
107 |
Correct |
104 ms |
14072 KB |
Output is correct |
108 |
Correct |
121 ms |
14528 KB |
Output is correct |
109 |
Correct |
66 ms |
13344 KB |
Output is correct |
110 |
Correct |
62 ms |
13416 KB |
Output is correct |
111 |
Correct |
130 ms |
16828 KB |
Output is correct |
112 |
Correct |
152 ms |
16188 KB |
Output is correct |
113 |
Correct |
111 ms |
14112 KB |
Output is correct |
114 |
Correct |
132 ms |
17580 KB |
Output is correct |
115 |
Correct |
128 ms |
17556 KB |
Output is correct |