Cod sursa(job #2200891)

Utilizator PredaBossPreda Andrei PredaBoss Data 2 mai 2018 21:16:50
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.94 kb
#include <bits/stdc++.h>

using namespace std;
int n,v[500005];
int aux[500005];
void merge(int st,int dr,int mij)
{
    int i=st;
    int j=mij+1;
    int pos=i;
    while(i<=mij || j<=dr)
    {
        if(j>dr || (i<=mij && v[i]<v[j]))
        {
            aux[pos]=v[i];
            i++;
        }
        else
        {
            aux[pos]=v[j];
            j++;
        }
        pos++;
    }
    for(int g=st;g<=dr;g++)
        v[g]=aux[g];
}
void merge_sort(int st,int dr)
{
    int mij;
    if(st<dr)
    {
        mij=(st+dr)/2;
        merge_sort(st,mij);
        merge_sort(mij+1,dr);
    }
    else
        return;
    merge(st,dr,mij);
}
int main()
{

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