Pagini recente » Cod sursa (job #3350037) | Cod sursa (job #2267996) | Cod sursa (job #1304532) | Cod sursa (job #1948273) | Cod sursa (job #3347127)
#include <cstdlib>
#include <ctime>
#include <iostream>
#define NMAX 500000
void heap_sort(int *v, int n)
{
int a;
if (n < 2)
return;
for (int k = n / 2 - 1; k >= 0; --k) {
for (int i = k, j = i, l, r; 1; i = j) {
l = 2 * i + 1;
r = 2 * i + 2;
if (l < n && v[l] > v[j])
j = l;
if (r < n && v[r] > v[j])
j = r;
if (j == i)
break;
a = v[i];
v[i] = v[j];
v[j] = a;
}
}
for (--n; n > 0; --n) {
a = v[n];
v[n] = v[0];
v[0] = a;
for (int i = 0, j = i, l, r; 1; i = j) {
l = 2 * i + 1;
r = 2 * i + 2;
if (l < n && v[l] > v[j])
j = l;
if (r < n && v[r] > v[j])
j = r;
if (j == i)
break;
a = v[i];
v[i] = v[j];
v[j] = a;
}
}
}
void merge_sort(int *v, int n)
{
int *w;
if (n < 2)
return;
merge_sort(v, n / 2);
merge_sort(v + n / 2, n - n / 2);
w = new int[n];
for (int i = 0, j = n / 2, k = 0; /* (i < n / 2 || j < n) && */ k < n; ++k)
if (j >= n || (i < n / 2 && v[i] < v[j]))
w[k] = v[i++];
else // i >= n / 2 || (j < n && v[i] >= v[j])
w[k] = v[j++];
for (int i = 0; i < n; ++i)
v[i] = w[i];
delete[] w;
}
void quick_sort(int *v, int n)
{
int a, pivot;
int m = 0;
if (n < 2)
return;
pivot = v[rand() % n];
// hoare partition
for (int i = 0, j = n - 1; 1; ++i, --j, ++m) {
while (v[i] < pivot) {
++i;
++m;
}
while (v[j] > pivot)
--j;
if (i >= j)
break;
a = v[i];
v[i] = v[j];
v[j] = a;
}
// for (int i = 0, j = n - 1; i < j;) {
// while (v[i] < pivot) {
// ++i;
// ++m;
// }
// while (v[j] > pivot)
// --j;
// if (i < j) {
// a = v[i];
// v[i] = v[j];
// v[j] = a;
// ++i;
// --j;
// ++m;
// }
// }
quick_sort(v, m);
quick_sort(v + m, n - m);
}
int main()
{
int n;
int v[NMAX];
freopen("algsort.in", "r", stdin);
freopen("algsort.out", "w", stdout);
srand(time(nullptr)); // used by quick sort
std::cin >> n;
for (int i = 0; i < n; ++i)
std::cin >> v[i];
quick_sort(v, n);
for (int i = 0; i < n; ++i)
std::cout << v[i] << ' ';
std::cout << '\n';
return 0;
}