Cod sursa(job #1516471)

Utilizator alexandru.rusuRusu Alexandru alexandru.rusu Data 3 noiembrie 2015 03:35:47
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.77 kb
#include <bits/stdc++.h>
#define MAX 500005
using namespace std;

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

int n,v[MAX],aux[MAX];

void mergesort(int l,int r)
{
    if(l==r) return;
    int m;
    m=(r+l)/2;
    mergesort(l,m);
    mergesort(m+1,r);
    int i,j,k;
    for(i=l,j=m+1,k=l;i<=m || j<=r; )
    {
        if((j>r)||(i<=m && v[i]<v[j]))
        {
            aux[k++]=v[i];
            i++;
        }
        else
        {
            aux[k++]=v[j];
            j++;
        }
    }
    for(k=l;k<=r;k++)
    {
        v[k]=aux[k];
    }
}

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