| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 97140 |
2019-02-14T04:33:50 Z |
qkxwsm |
Swap (BOI16_swap) |
C++14 |
|
3 ms |
384 KB |
#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/rope>
using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;
random_device(rd);
mt19937 rng(rd());
const long long FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
struct custom_hash
{
template<class T>
unsigned long long operator()(T v) const
{
unsigned long long x = v;
x += FIXED_RANDOM;
// x += 11400714819323198485ull;
// x = (x ^ (x >> 30)) * 13787848793156543929ull;
x = (x ^ (x >> 27)) * 10723151780598845931ull;
return x ^ (x >> 31);
}
};
template<class T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<class T, class U> using hash_table = gp_hash_table<T, U, custom_hash>;
template<class T>
T randomize(T mod)
{
return (uniform_int_distribution<T>(0, mod - 1))(rng);
}
template<class T>
void readi(T &x)
{
x = 0;
bool negative = false;
char c = ' ';
while (c < '-')
{
c = getchar();
}
if (c == '-')
{
negative = true;
c = getchar();
}
while (c >= '0')
{
x = x * 10 + (c - '0');
c = getchar();
}
if (negative)
{
x = -x;
}
}
template<class T>
void printi(T output)
{
if (output == 0)
{
putchar('0');
return;
}
if (output < 0)
{
putchar('-');
output = -output;
}
int buf[20], n = 0;
while(output)
{
buf[n] = ((output % 10));
output /= 10;
n++;
}
for (n--; n >= 0; n--)
{
putchar(buf[n] + '0');
}
return;
}
template<class T>
void ckmin(T &a, T b)
{
a = min(a, b);
}
template<class T>
void ckmax(T &a, T b)
{
a = max(a, b);
}
long long expo(long long a, long long e, long long mod)
{
return ((e == 0) ? 1 : ((expo(a * a % mod, e >> 1, mod)) * ((e & 1) ? a : 1) % mod));
}
template<class T, class U>
void nmod(T &x, U mod)
{
if (x >= mod) x -= mod;
}
template<class T>
T gcd(T a, T b)
{
return (b ? gcd(b, a % b) : a);
}
#define y0 ___y0
#define y1 ___y1
#define MP make_pair
#define PB push_back
#define LB lower_bound
#define UB upper_bound
#define fi first
#define se second
#define DBG(x) cerr << #x << " = " << (x) << endl
#define SZ(x) ((int) ((x).size()))
#define FOR(i, a, b) for (auto i = (a); i < (b); i++)
#define FORD(i, a, b) for (auto i = (a) - 1; i >= (b); i--)
#define ALL(x) (x).begin(), (x).end()
const long double PI = 4.0 * atan(1.0);
const long double EPS = 1e-9;
#define MAGIC 347
#define SINF 10007
#define CO 1000007
#define INF 1000000007
#define BIG 1000000931
#define LARGE 1696969696967ll
#define GIANT 2564008813937411ll
#define LLINF 2696969696969696969ll
#define MAXN 200013
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<ld, ld> pdd;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<ld> vd;
typedef vector<pii> vpi;
typedef vector<pll> vpl;
typedef vector<pdd> vpd;
int N;
int arr[MAXN];
bitset<MAXN> ok;
int32_t main()
{
ios_base::sync_with_stdio(0); cin.tie(0);
// cout << fixed << setprecision(10);
// cerr << fixed << setprecision(10);
// if (fopen("file.in", "r"))
// {
// freopen ("file.in", "r", stdin);
// freopen ("file.out", "w", stdout);
// }
cin >> N;
FOR(i, 1, N + 1)
{
cin >> arr[i];
}
FOR(i, 1, (N / 2) + 1)
{
if (2 * i == N)
{
if (arr[i] > arr[2 * i])
{
swap(arr[i], arr[2 * i]);
}
break;
}
// if (ok[i])
// {
// //suppose you don't swap!
// }
int x = arr[i], y = arr[2 * i], z = arr[2 * i + 1];
// if (ok[i] && arr[i + 1] < x && arr[i + 1] < y && arr[i + 1] < z)
// {
// swap(arr[i], arr[i + 1]);
// continue;
// }
if (x < y && x < z)
{
continue;
}
if (y < x && y < z)
{
arr[i] = y; arr[2 * i] = x; arr[2 * i + 1] = z;
continue;
}
arr[i] = z; arr[2 * i] = min(x, y); arr[2 * i + 1] = max(x, y);
ok[2 * i] = true;
// cerr << "OK " << 2 * i << endl;
pii xy = {x, y}, yx = {y, x};
if (4 * i <= N)
{
ckmin(xy.fi, arr[4 * i]);
ckmin(yx.fi, arr[4 * i]);
}
if (4 * i + 1 <= N)
{
ckmin(xy.fi, arr[4 * i + 1]);
ckmin(yx.fi, arr[4 * i + 1]);
}
if (4 * i + 2 <= N)
{
ckmin(xy.se, arr[4 * i + 2]);
ckmin(yx.se, arr[4 * i + 2]);
}
if (4 * i + 3 <= N)
{
ckmin(xy.se, arr[4 * i + 3]);
ckmin(yx.se, arr[4 * i + 3]);
}
if (xy <= yx)
{
arr[2 * i] = x;
arr[2 * i + 1] = y;
}
else
{
arr[2 * i] = y;
arr[2 * i + 1] = x;
}
}
FOR(i, 1, N + 1)
{
if (i != 1) cout << ' '; cout << arr[i];
}
cout << '\n';
// cerr << "time elapsed = " << (clock() / (CLOCKS_PER_SEC / 1000)) << " ms" << endl;
return 0;
}
/* READ READ READ
* int overflow, maxn too small, special cases (n=1?, two distinct?), cin.tie() interactive
* reread the problem, try small cases
* note down possible sources of error as you go
* do smth instead of nothing
*/
Compilation message
swap.cpp: In function 'int32_t main()':
swap.cpp:239:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
if (i != 1) cout << ' '; cout << arr[i];
^~
swap.cpp:239:28: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
if (i != 1) cout << ' '; cout << arr[i];
^~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
384 KB |
Output is correct |
| 2 |
Incorrect |
2 ms |
384 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
384 KB |
Output is correct |
| 2 |
Incorrect |
2 ms |
384 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
384 KB |
Output is correct |
| 2 |
Incorrect |
2 ms |
384 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
384 KB |
Output is correct |
| 2 |
Incorrect |
2 ms |
384 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
384 KB |
Output is correct |
| 2 |
Incorrect |
2 ms |
384 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
