Cod sursa(job #1152022)

Utilizator XeBluePodaru Mihai XeBlue Data 24 martie 2014 15:11:47
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.87 kb
#include <fstream>

using namespace std;

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

int v[500001], n, aux[500001];
void ms(int st, int dr);
void merge(int st, int dr);

int main()
{
    in >> n;
    for(int i=1;i<=n;i++)
        in >> v[i];
    ms(1,n);

    for(int i=1;i<=n;i++)
        out << v[i] << " ";

    in.close();
    out.close();
    return 0;
}

void ms(int st, int dr)
{
    if(st==dr)
        return;
    int m=(st+dr)/2;
    ms(st,m);
    ms(m+1,dr);
    merge(st,dr);
}

void merge(int st, int dr)
{
    int m=(st+dr)/2, i=st, k=st, j=m+1;
    while(i<=m && j<=dr)
    {
        if(v[i]<=v[j])
            aux[k++]=v[i++];
        else
            aux[k++]=v[j++];
    }
    while(i<=m)
        aux[k++]=v[i++];
    while(j<=dr)
        aux[k++]=v[j++];
    for(k=st;k<=dr;k++)
        v[k]=aux[k];
}