Cod sursa(job #2269459)

Utilizator marian013Giugioiu Marian Constantin marian013 Data 25 octombrie 2018 23:29:48
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.83 kb
#include<fstream>
using namespace std;
ifstream f("algsort.in");
ofstream g("algsort.out");
int v[500002],a[500002];
void interclasare(int st,int dr,int m){
int i,j,k=st-1;
i=st;
j=m+1;
while(i<=m && j<=dr)
  if(v[i]<=v[j]){
     k++;
     a[k]=v[i];
     i++;
    }
  else {
        k++;
        a[k]=v[j];
        j++;
       }
if(i<=m)
  for(j=i;j<=m;j++)
    {k++;
     a[k]=v[j];
    }
else for(i=j;i<=dr;i++)
        {k++;
         a[k]=v[i];
        }
for(i=st;i<=dr;i++)
    v[i]=a[i];
}
void mergesort(int st,int dr){
    if(st<dr){
        int m=(dr+st)/2;
        mergesort(st,m);
        mergesort(m+1,dr);
        interclasare(st,dr,m);
    }
}
int main()
{
    int n,i;
    f>>n;
    for(i=1;i<=n;i++)
        f>>v[i];
    mergesort(1,n);
    for(i=1;i<=n;i++)
        g<<v[i]<<" ";
}