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Cod sursa(job #970042)
#include <fstream>
using namespace std;
void merge_sort(int a[] , int n);
void Merge_sort(int a[] , int left , int right);
void Merge(int a[] , int left , int mid , int right);
void merge_sort(int a[] , int n)
{
Merge_sort(a , 0 , n-1);
}
void Merge_sort(int a[] , int left , int right)
{
if(left < right){
int mid = (left + right) / 2;
Merge_sort(a , left , mid );
Merge_sort(a , mid + 1 , right);
Merge( a , left , mid , right );
}
}
void Merge(int a[] , int left , int mid , int right)
{
mid++;
int aux = mid , i=left , j ,aux2=left;
int temp[100];
while( left < aux && mid <= right ) {
if(a[left] > a[mid] ){
temp[i] = a[mid];
mid++;
}
else {
temp[i] = a[left];
left++;
}
i++;
}
if(left < aux)
for(j=i; j<=right; j++){
temp[j]=a[left];
left++;
}
else
for(j=i; j<=right; j++){
temp[j]=a[mid];
mid++;
}
for(i=aux2;i<=right;i++)
a[i]=temp[i];
}
int main()
{
int n , a[100];
ifstream in("algsort.in");
ofstream out("algsort.out");
in>>n;
for(int i=0; i<n; ++i)
in>>a[i];
merge_sort(a,n);
for(int i=0; i<n; ++i)
out<<a[i]<<" ";
return 0;
}