Cod sursa(job #2900145)

Utilizator StanCatalinStanCatalin StanCatalin Data 10 mai 2022 14:27:10
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.06 kb
#include <iostream>
#include <fstream>
#include <vector>

using namespace std;

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

const int dim = 500005;

int vec[dim];
int n;

void MergeSort(int *vec, int n) {
    if (n <= 1) return;
    int *vec1, *vec2;
    vec1 = vec;
    int a_n = n/2;
    vec2 = vec + n/2;
    int b_n = n - n/2;
    MergeSort(vec1, a_n);
    MergeSort(vec2, b_n);
    int i = 0;
    int j = 0;
    vector<int> newvec;
    while (i < a_n && j < b_n) {
        if (vec1[i] <= vec2[j]) {
            newvec.push_back(vec1[i++]);
        } else {
            newvec.push_back(vec2[j++]);
        }
    }
    while (i < a_n) {
        newvec.push_back(vec1[i++]);
    }
    while (j < b_n) {
        newvec.push_back(vec2[j++]);
    }
    int cnt = 0;
    for (auto &y:newvec) {
        vec[cnt++] = y;
    }
}

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