Cod sursa(job #3309331)

Utilizator Costy2345Costi Dimian Costy2345 Data 3 septembrie 2025 16:50:34
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.44 kb
#include <bits/stdc++.h>

using namespace std;

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

int n;
vector<int> v;

vector<int> interclasare(vector<int> &a, vector<int> &b)
{
    vector<int> c;
    int i = 0, j = 0;
    while (i < a.size() && j < b.size())
    {
        if (a[i] <= b[j])
        {
            c.push_back(a[i++]);
        }
        else if (a[i] > b[j])
        {
            c.push_back(b[j++]);
        }
    }
    while (i < a.size())
    {
        c.push_back(a[i++]);
    }
    while (j < b.size())
    {
        c.push_back(b[j++]);
    }
    return c;
}

void mergeSort(int st, int dr)
{
    if (st == dr)
    {
        return;
    }
    else
    {
        int mid = (st + dr) / 2;
        mergeSort(st, mid);
        mergeSort(mid + 1, dr);
        vector<int> a;

        for (int i = st; i <= mid; i++)
        {
            a.push_back(v[i]);
        }
        vector<int> b;
        for (int i = mid + 1; i <= dr; i++)
        {
            b.push_back(v[i]);
        }
        vector<int> c = interclasare(a, b);
        for (int i = st, idx = 0; i <= dr; i++, idx++)
        {
            v[i] = c[idx];
        }
    }
}

int main()
{

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