Cod sursa(job #1020428)

Utilizator Iustin_BulimarFMI Iustin Bulimar Iustin_Bulimar Data 2 noiembrie 2013 01:24:34
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.05 kb
#include <fstream>

using namespace std;

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

void merge(int v[], int st, int m, int dr)
{
    int i=st, j=m, x=st-1, c[500001];

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

int n, i, v[500001];
int main()
{
    cin>>n;
    for(i=1; i<=n; i++) cin>>v[i];
    msort(v, 1, n);
    for(i=1; i<=n; i++) cout<<v[i]<<" ";
    return 0;
}