Cod sursa(job #2330053)

Utilizator dacianouaPapadia Mortala dacianoua Data 27 ianuarie 2019 19:51:01
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.68 kb
#include <iostream>
#include <fstream>
#define Nmax 500000
using namespace std;
ifstream fin("algsort.in");
ofstream fout("algsort.out");
int N, A[Nmax+5], B[Nmax+5];
void merge_sort(int l, int r)
{
    int m = (l + r) >> 1, i, j, k;
    if (l == r) return;
    merge_sort(l, m);
    merge_sort(m + 1, r);
    for (i=l, j=m+1, k=l; i<=m || j<=r; )
        if (j > r || (i <= m && A[i] < A[j]))
            B[k++] = A[i++];
        else
            B[k++] = A[j++];
    for (k = l; k <= r; k++) A[k] = B[k];
}
int main()
{
    fin>>N;
    for(int i=1;i<=N;i++)
        fin>>A[i];
    merge_sort(1,N);
    for(int i=1;i<=N;i++)
        fout<<A[i]<<" ";
    return 0;
}