Cod sursa(job #1314228)

Utilizator roberta9533Pavel Roberta roberta9533 Data 11 ianuarie 2015 17:16:35
Problema Sortare prin comparare Scor 40
Compilator cpp Status done
Runda Arhiva educationala Marime 0.88 kb
#include <iostream>
#include<fstream>
using namespace std;
ifstream f("algsort.in");
ofstream g("algsort.out");
void merge(int a[],int s,int m,int d)
{
    int i,j,k,b[10000],q;
    i=s;j=m+1;k=s;
    while(i<=m&&j<=d)
        {if(a[i]<a[j])
            {b[k]=a[i]; i++;}
            else {b[k]=a[j]; j++;}
        k++;}
    if(i>m) for(q=j;q<=d;q++)
    {
        b[k]=a[q];
        k++;
    }
    else for(q=i;q<=m;q++)
    {
        b[k]=a[q];
        k++;
    }
    for(i=s;i<=d;i++)
        a[i]=b[i];
}

void mergesort(int a[],int s,int d)
{
    int m;
    if(s<d)
    {
        m=(s+d)/2;
        mergesort(a,s,m);
        mergesort(a,m+1,d);
        merge(a,s,m,d);
    }
}

int main()
{
    int n,i,a[1000];
    f>>n;
    for(i=1;i<=n;i++)
        f>>a[i];
    mergesort(a,1,n);
    for(i=1;i<=n;i++)
        g<<a[i]<<" ";
    return 0;
}