Cod sursa(job #1313679)

Utilizator eneandradaEne Oana-Andrada eneandrada Data 10 ianuarie 2015 22:42:25
Problema Sortare prin comparare Scor 40
Compilator cpp Status done
Runda Arhiva educationala Marime 0.85 kb
#include <iostream>
#include <fstream>

using namespace std;

ifstream f("algsort.in");
ofstream g("algsort.out");


int N,i,j;
long v[500005];

void interclasare(int st,int m,int dr)
{
    long w[500005]={0};
    int k=0,z=st;
    i=st; j=m+1;
    while(i<=m && j<=dr)
        if(v[i]<v[j])
            w[++k]=v[i++];
        else
            w[++k]=v[j++];
    while(i<=m)
        w[++k]=v[i++];
    while(j<=dr)
        w[++k]=v[j++];
    for(i=1;i<=k;i++)
        v[z++]=w[i];
}

void mergesort(int st,int dr)
{
    if(st<dr)
    {
        int m=(st+dr)>>1;
        mergesort(st,m);
        mergesort(m+1,dr);
        interclasare(st,m,dr);
    }
}

int main()
{
    f>>N;
    for(i=1;i<=N;i++)
        f>>v[i];
    mergesort(1,N);
    for(i=1;i<=N;i++)
        g<<v[i]<<" ";
    f.close(); g.close();
    return 0;
}