#include <bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pli pair<ll,int>
#define pil pair<int,ll>
#define fi first
#define se second
#define inf (INT_MAX/2-1)
#define infl (1LL<<60)
#define vi vector<int>
#define vl vector<ll>
#define pb push_back
#define sz(a) (int)(a).size()
#define all(a) begin(a),end(a)
#define y0 y5656
#define y1 y7878
#define y2 y9090
#define aaa system("pause");
#define dbg(x) cerr<<(#x)<<": "<<(x)<<'\n',aaa
#define dbga(x,n) cerr<<(#x)<<"[]: ";for(int _=0;_<n;_++)cerr<<x[_]<<' ';cerr<<'\n',aaa
#define dbgs(x) cerr<<(#x)<<"[stl]: ";for(auto _:x)cerr<<_<<' ';cerr<<'\n',aaa
#define dbgp(x) cerr<<(#x)<<": "<<x.fi<<' '<<x.se<<'\n',aaa
#include "shoes.h"
using namespace std;
ll f_la_fel (vi v) {
int n = sz(v);
auto to_equal = [&n] (vi v, vi to) {
vi p1, p2;
int i, j, z;
for (i = 0; i < n; i++)
if (v[i] < 0) p1.pb(i);
for (i = 0; i < n; i++)
if (to[i] < 0) p2.pb(i);
ll ans = 0;
for (i = 0; i < n/2; i++) ans += abs(p2[i]-p1[i]);
return ans;
};
int x = abs(v[0]);
vi to1(n, x), to2(n, -x);
for (int i = 0; i < n; i += 2) {
to1[i] *= -1;
to2[i] *= -1;
}
return min(to_equal(v, to1), to_equal(v, to2));
}
ll f1000 (vi v) {
int n = sz(v), i, j, z;
ll ans = 0;
for (i = 0; i < n/2; i++) {
j = 2*i;
while (j < n && v[j] < 0) j++;
if (j > 0 && v[j-1] == -v[j]) continue;
z = j+1;
while (z < n && v[z] != -v[j]) z++;
if (j < n && z < n) {
while (z > j) {
swap(v[z], v[z-1]);
ans++;
z--;
}
}
}
return ans;
}
ll count_swaps (vi v) {
int n = sz(v);
if (n == 2) {
if (v[0] > v[1]) return 1;
return 0;
}
if (n <= 2000) return f1000(v);
return f_la_fel(v);
}
//int main () {
// int n; cin >> n;
// int i, j, z;
// vi v(n*2);
// for (i = 0; i < 2*n; i++) cin >> v[i];
// cout << count_swaps(v);
// return 0;
//}
Compilation message
shoes.cpp: In lambda function:
shoes.cpp:32:12: warning: unused variable 'j' [-Wunused-variable]
32 | int i, j, z;
| ^
shoes.cpp:32:15: warning: unused variable 'z' [-Wunused-variable]
32 | int i, j, z;
| ^
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
256 KB |
Output is correct |
2 |
Correct |
0 ms |
256 KB |
Output is correct |
# |
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 |
Incorrect |
0 ms |
256 KB |
Output isn't correct |
4 |
Halted |
0 ms |
0 KB |
- |
# |
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 |
Incorrect |
1 ms |
256 KB |
Output isn't correct |
4 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
256 KB |
Output is correct |
2 |
Incorrect |
0 ms |
256 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
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 |
Incorrect |
0 ms |
256 KB |
Output isn't correct |
4 |
Halted |
0 ms |
0 KB |
- |
# |
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 |
Incorrect |
0 ms |
256 KB |
Output isn't correct |
4 |
Halted |
0 ms |
0 KB |
- |