Cod sursa(job #1239496)

Utilizator deresurobertoFMI - Deresu Roberto deresuroberto Data 9 octombrie 2014 09:08:11
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.75 kb
#include<cstdio>
#define nx 500007
int n,i,v[nx];
using namespace std;

void sort(int l,int r)
{
    int m=(l+r)/2,i=l,j=m+1,k=0,a[nx];

    while(i<=m && j<=r)
    {
        while(v[i]<=v[j] && i<=m)a[++k]=v[i++];
        while(v[i]>=v[j] && j<=r)a[++k]=v[j++];
    }

    if(i>m)while(j<=r)a[++k]=v[j++];
    else while(i<=m)a[++k]=v[i++];

    for(i=l;i<=r;i++)v[i]=a[i-l+1];
}

void merge(int l,int r)
{
    if(l==r)return;
    merge(l,(l+r)/2);
    merge((l+r)/2+1,r);
    sort(l,r);
}

int main()
{
    freopen("algsort.in","r",stdin);
    freopen("algsort.out","w",stdout);
    scanf("%d",&n);
    for(i=1;i<=n;i++)
        scanf("%d",&v[i]);
    merge(1,n);
    for(i=1;i<=n;i++)
        printf("%d ",v[i]);
    return 0;
}