Cod sursa(job #3254717)

Utilizator AlexanderCernyCernaianu Alexandru AlexanderCerny Data 8 noiembrie 2024 17:16:33
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.9 kb
///https://infoarena.ro/problema/algsort
///MergeSort

#include <fstream>
#define DIM 500001

using namespace std;

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

int n,i,v[DIM];
int t[DIM];
void interclasare(int st, int mij, int dr)
{
    int i=st;
    int j=mij+1;
    int k=st-1;
    while(i<=mij && j<=dr)
        if(v[i]<=v[j])
            t[++k]=v[i++];
        else
            t[++k]=v[j++];
    while(i<=mij)
        t[++k]=v[i++];
    while(j<=dr)
        t[++k]=v[j++];
    for(i=st;i<=dr;i++)
        v[i]=t[i];
}
void mergeSort(int st, int dr)
{
    if(st<dr)
    {
        int mij=(st+dr)/2;
        mergeSort(st, mij);
        mergeSort(mij+1, dr);
        interclasare(st, mij, dr);
    }
}
int main()
{
    fin>>n;
    for(i=1;i<=n;i++)
        fin>>v[i];
    mergeSort(1,n);
    for(i=1;i<=n;i++)
        fout<<v[i]<<" ";
    return 0;
}