Cod sursa(job #2900143)

Utilizator CharacterMeCharacter Me CharacterMe Data 10 mai 2022 14:25:10
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.95 kb
#include <bits/stdc++.h>

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

void mergeSort(std::vector<int>& arr, int lft, int rgt)
{
    if (lft == rgt) {
        return;
    }

    std::vector<int> sorted;
    int mid = (lft + rgt) / 2;
    mergeSort(arr, lft, mid);
    mergeSort(arr, mid + 1, rgt);

    int i = lft, j = mid + 1;
    while (i <= mid && j <= rgt) {
        if (arr[i] >= arr[j]) {
            sorted.push_back(arr[j++]);
        } else {
            sorted.push_back(arr[i++]);
        }
    }

    while (i <= mid) {
        sorted.push_back(arr[i++]);
    }

    while (j <= rgt) {
        sorted.push_back(arr[j++]);
    }

    for (int k = lft; k <= rgt; ++k) {
        arr[k] = sorted[k - lft];
    }
}

int main() {
    int n;
    fin >> n;

    std::vector<int> arr(n);
    for (auto &it:arr) {
        fin >> it;
    }

    mergeSort(arr, 0, n - 1);

    for (auto it:arr) {
        fout << it << " ";
    }

    return 0;
}