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Cod sursa(job #799388)
#include <fstream>
#include <iostream>
using namespace std;
ifstream f("algsort.in");
ofstream g("algsort.out");
int a[100000],n;
void interclas(int lo,int mid,int hi)
{
int b[100000];
int x=lo;
int y=mid+1;
int k=1;
while(x<=mid && y<=hi)
if(a[x]<a[y]){b[k]=a[x];k++;x++;}
else {b[k]=a[y];k++;y++;}
while(x<=mid)
{b[k]=a[x];x++;k++;}
while(y<=hi)
{b[k]=a[y];k++;y++;}
int t=lo;
for(k=1;k<=(hi-lo)+1;k++)
{a[t]=b[k];t++;}
}
void merge(int lo,int hi)
{
if(lo<hi){
int mid=lo+(hi-lo)/2;
merge(lo,mid);
merge(mid+1,hi);
interclas(lo,mid,hi);}
}
int main()
{
f>>n;
int i;
for(i=1;i<=n;i++)
f>>a[i];
merge(1,n);
for(i=1;i<=n;i++)
g<<a[i]<<" ";
return 0;
}