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Cod sursa(job #655013)
#include <iostream>
#include <fstream>
using namespace std;
int a[500005], N;
void interclasare (int i, int m, int j)
{
int b[500005];
int x=i;
int k=1;
int y=m+1;
while ((x<=m)&&(y<=j))
if (a[x]<a[y])
b[k++]=a[x++];
else
b[k++]=a[y++];
while (x<=m)
b[k++]=a[x++];
while (y<=j)
b[k++]=a[y++];
int t=i;
for (k=i; k<=(j-i)+1; k++)
a[t++]=b[k];
}
void div_imp (int i, int j)
{
if (i<j)
{int m=(i+j)/2;
div_imp(i,m);
div_imp(m+1,j);
interclasare(i,m,j);}
}
int main()
{
ifstream f("algsort.in");
ofstream g("algsort.out");
f>>N;
for (int p=1; p<=N; ++p)
f>>a[p];
div_imp(1,N);
for (int p=1; p<=N; ++p)
g<<a[p]<<" ";
return 0;
}