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Cod sursa(job #854043)
#include <fstream>
#include <iostream>
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, *C=new int[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];
}
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()
{
ifstream in("algsort.in");
ofstream out("algsort.out");
int n, i;
in>>n;
for (i=0; i<n; ++i)
in>>V[i];
mergeSort(V, 0, n-1);
for (i=0; i<n; ++i)
out<<V[i]<<" ";
}