Cod sursa(job #2897311)

Utilizator AndreiJJIordan Andrei AndreiJJ Data 3 mai 2022 14:27:07
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.05 kb
#include <iostream>
#include <fstream>
#include <vector>

using namespace std;

void Merge(vector <int> &a, int left, int mid, int right)
{
    int i = left, j = mid + 1;
    vector <int> aux;
    while (i <= mid && j <= right)
    {
        if (a[i] <= a[j])
            aux.push_back(a[i++]);
        else aux.push_back(a[j++]);
    }
    while (i <= mid)
        aux.push_back(a[i++]);
    while (j <= right)
        aux.push_back(a[j++]);
    j = 0;
    for (i = left; i <= right; i++)
        a[i] = aux[j++];
}

void MergeSort(vector <int> &a, int left, int right)
{
    if (left >= right)
        return;
    int mid = (left + right) / 2;
    MergeSort(a, left, mid);
    MergeSort(a, mid  + 1, right);
    Merge(a, left, mid, right);
}

void Read_Solve()
{
    ifstream fin ("algsort.in");
    int n;
    fin >> n;
    vector <int> v(n);
    for (int i = 0; i < n; i++)
        fin >> v[i];
    MergeSort(v, 0, n - 1);
    ofstream fout ("algsort.out");
    for (auto &it : v)
        fout << it << " ";
    fout << "\n";
}

int main() {
    Read_Solve();
    return 0;
}