Cod sursa(job #2277017)

Utilizator maria15Maria Dinca maria15 Data 5 noiembrie 2018 18:30:47
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.91 kb
#include <fstream>

using namespace std;

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

int n, i, v[500002], a[500002], b[500002];

void sortare(int s, int f){
    if(s != f){
        int mid = (s+f)/2;
        sortare(s, mid);
        sortare(mid+1, f);
        int i, j;
        for(i = 1;i<=mid-s+1;i++)
            a[i] = v[i+s-1];
        for(j = 1;j<=f-mid;j++)
            b[j] = v[j+mid];
        i = j = 1;
        int k = s;
        while(i <= mid-s+1 && j <= f-mid){
            if(a[i] < b[j])
                v[k++] = a[i], i++;
            else
                v[k++] = b[j], j++;
        }
        for(;i<=mid-s+1;i++)
            v[k++] = a[i];
        for(;j<=f-mid;j++)
            v[k++] = b[j];
    }
}

int main(){
    fin>>n;
    for(i=1;i<=n;i++)
        fin>>v[i];
    sortare(1, n);
    for(i=1;i<=n;i++)
        fout<<v[i]<<" ";
    return 0;
}