Cod sursa(job #2228111)

Utilizator valorosu_300Cristian Gherman valorosu_300 Data 2 august 2018 18:16:05
Problema Sortare prin comparare Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.11 kb
#include <fstream>
using namespace std;
ifstream in("algsort.in");
ofstream out("algsort.out");
const int N = 500002;
int v[N];
void sortare(int i, int j){
    if(v[i] > v[j])
        swap(v[i],v[j]);
}
void interclasare(int st, int dr, int mid){
    int a[dr-st+1], i = st, j = mid + 1, poz = 0;
    while(i <= mid && j <= dr)
        if(v[i] > v[j])
            a[poz++] = v[j++];
        else
            a[poz++] = v[i++];
    if(i < mid)
        for(int j=i;j<=mid;j++)
            a[poz++] = v[j];
    else
        for(int i=j;i<=dr;i++)
            a[poz++] = v[i];
    for(int i=0;i<poz;i++)
        v[st+i] = a[i];
}
void divide(int st, int dr){
    int mid = (st + dr) / 2;
    if(dr - st <= 1)
        sortare(st,dr);
    else{
        divide(st,mid);
        divide(mid+1,dr);
        interclasare(st,dr,mid);
    }
}
void mergeSort(int n){
    divide(1,n);
}
int main()
{
    int n;
    in>>n;
    for(int i=1;i<=n;i++)
        in>>v[i];
    in.close();
    mergeSort(n);
    for(int i=1;i<=n;i++)
        out<<v[i]<<" ";
    out<<"\n";
    out.close();
    return 0;
}