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Cod sursa(job #837955)
#include <cstdio>
#include <cstring>
#include <iostream>
using namespace std;
const int MAXN = 500001;
int A[MAXN];
void mergesort(int left, int right)
{
if (left >= right)
return;
int m = (left + right) / 2;
mergesort(left, m);
mergesort(m + 1, right);
int i = left, j = m + 1, k = 0;
int B[right - left + 1];
while (i <= m && j <= right)
if (A[i] <= A[j])
B[k++] = A[i++];
else B[k++] = A[j++];
while (i <= m)
B[k++] = A[i++];
while (j <= right)
B[k++] = A[j++];
for (i = left, k = 0; i <= right; ++i, ++k)
A[i] = B[k];
}
int main()
{
freopen("algsort.in", "r", stdin);
freopen("algsort.out", "w", stdout);
int n;
cin >> n;
for (int i = 0; i < n; ++i)
cin >> A[i];
mergesort(0, n - 1);
for (int i = 0; i < n - 1; ++i)
cout << A[i] << " ";
cout << A[n - 1] << "\n";
return 0;
}