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Cod sursa(job #658043)
#include<fstream>
#include<iostream>
#include<stdlib.h>
using namespace std;
ifstream in("algsort.in");
ofstream out("algsort.out");
const int N=500000;
//interclasarea vectorilor
void merge( int v[N],int a, int b)
{
int c[N],i=a,j,k=0,m=(int)(a+b)/2;
//c=( int *)malloc((a+b)*sizeof( int ));
j=m+1;
while(i<=m&&j<=b)
{
if(v[i]<=v[j])
c[k++]=v[i++];
else
c[k++]=v[j++];
}
for(;i<=m;i++)
c[k++]=v[i];
for(;j<=b;j++)
c[k++]=v[j];
j=a;
for(i=0;i<k;i++)
v[j++]=c[i];
}
//impartirea vectorului in vectori mai mici
void divide_sort( int v[N],int a, int b)
{
if(a<b)
{
int m=(int)(a+b)/2;
divide_sort(v,a,m);
divide_sort(v,m+1,b);
merge(v,a,b);
}
}
int main()
{
int v[N],n,i;
in>>n;
//dimensionarea vectorului la nivelul lui n
//v=( int *)malloc(n*sizeof( int ));
for(i=0;i<n;i++)
in>>v[i];
divide_sort(v,0,n-1);
for(i=0;i<n;i++)
out<<v[i]<<"\t";
return 0;
}