Cod sursa(job #3242122)

Utilizator CondoracheAlexandruCondorache Alexandru CondoracheAlexandru Data 9 septembrie 2024 11:41:24
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.49 kb
#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define F first
#define S second
#define endl '\n'
#define all(a) (a).begin(),(a).end()
using namespace std;
const int maxn = 1e5 + 5;

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

void merge(vector<int>& a, int l, int mid, int r) {
    vector<int> left, right;
    int n = mid - l + 1;
    int m = r - mid;
    for (int i = 0; i < n; i++) {
        left.pb(a[l + i]);
    }
    for (int i = 0; i < m; i++) {
        right.pb(a[mid + i + 1]);
    }   
    int j = 0, i = 0;
    n = left.size();
    m = right.size();
    int k = l;
    while (j < m && i < n) {
        if (left[i] <= right[j]) {
            a[k] = left[i];
            i++;
        }
        else {
            a[k] = right[j];
            j++;
        }
        k++;
    }
    while (i < n) {
        a[k] = left[i];
        k++;
        i++;
    }
    while (j < m) {
        a[k] = right[j];
        j++;
        k++;
    }
}


void merge_sort(vector<int>& a, int l, int r) {
    if (l >= r) {
        return;
    }
    int mid = l + (r - l) / 2;
    merge_sort(a, l, mid);
    merge_sort(a, mid + 1, r);
    merge(a, l, mid, r);
}

void solve() {
    int n;
    fin >> n;
    vector<int> a(n);
    for (int i = 0; i < n; i++) {
        fin >> a[i];
    }
    merge_sort(a, 0, n - 1);
    for (int i = 0; i < n; i++) {
        fout << a[i] << " ";
    }
    fout << endl;
}
 
int main() {
    int t = 1;
    // cin >> t;
    while (t--) {
        solve();
    }
    return 0;
}