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Cod sursa(job #854050)
#include <cstdio>
#include <cstdlib>
using namespace std;
int V[500000];
void merge(int *A, int startA, int stopA, int *B, int startB, int stopB)
{
int i=startA, j=startB, k=0;
int *C=(int*)malloc(4*(stopA-startA+stopB-startB+2));
while (i<=stopA && j<=stopB)
if (A[i] < B[j])
C[k++] = A[i++];
else C[k++] = B[j++];
while (i <= stopA)
C[k++] = A[i++];
while (j <= stopB)
C[k++] = B[j++];
for (i=startA; i<startA+k; ++i)
A[i] = C[i-startA];
free(C);
}
void mergeSort(int *V, int inc, int sf)
{
if (inc == sf) return;
int m = (inc+sf)>>1;
mergeSort(V, inc, m);
mergeSort(V, m+1, sf);
merge(V, inc, m, V, m+1, sf);
}
int main()
{
freopen("algsort.in", "r", stdin);
freopen("algsort.out", "w", stdout);
int n, i;
scanf("%d", &n);
for (i=0; i<n; ++i)
scanf("%d", &V[i]);
mergeSort(V, 0, n-1);
for (i=0; i<n; ++i)
printf("%d ", V[i]);
}