Cod sursa(job #2736994)

Utilizator moise_alexandruMoise Alexandru moise_alexandru Data 4 aprilie 2021 12:05:05
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.98 kb
#include <iostream>
#include <fstream>
using namespace std;
ifstream in("algsort.in");
ofstream out("algsort.out");
const int maxn = 500005;
int A[maxn];
int v[maxn];

void mergesort(int st, int dr)
{
    if(st == dr)
        return;
    int mij = (st + dr) / 2;
    mergesort(st, mij);
    mergesort(mij + 1, dr);
    int poz1 = st;
    int poz2 = mij + 1;
    int p = st;
    while(poz1 <= mij && poz2 <= dr)
    {
        if(v[poz1] <= v[poz2])
        {
            A[p++] = v[poz1];
            poz1++;
        }
        else
        {
            A[p++] = v[poz2];
            poz2++;
        }
    }
    while(poz1 <= mij)
        A[p++] = v[poz1++];
    while(poz2 <= dr)
        A[p++] = v[poz2++];
    for(int i = st; i <= dr; i++)
        v[i] = A[i];
}

int main()
{
    int n;
    in >> n;
    for(int i = 1; i <= n; i++)
        in >> v[i];
    mergesort(1, n);
    for(int i = 1; i <= n; i++)
        out << v[i] << " ";
    return 0;
}