Cod sursa(job #2272765)

Utilizator CristyXtremeSimion Cristian CristyXtreme Data 30 octombrie 2018 17:18:39
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.27 kb
#include <stdio.h>

using namespace std;

void sortare_interclasare(int *v, int *a, int *b, int n) {
    int i = 0, j = 0, mid = n / 2;
    for (int k = 0; k < n; k++) {
        if (i == mid) {
            v[k] = b[j];
            j++;
            continue;
        }
        if (j == mid + n % 2) {
            v[k] = a[i];
            i++;
            continue;
        }
        if (a[i] > b[j]) {
            v[k] = b[j];
            j++;
        }
        else {
            v[k] = a[i];
            i++;
        }
    }
}

void merge_sort(int *v, int n) {
    if (n > 1) {
        int mid =  n / 2, k = 0;
        int a[mid + 1], b[mid + 1];
        for (int i = 0; i < mid; i++)
            a[i] = v[i];
        for (int i = mid; i < n; i++)
            b[k++] = v[i];
        merge_sort(a, mid);
        merge_sort(b, mid + n % 2);
        sortare_interclasare(v, a, b, n);
    }
}

int main() {
    freopen("algsort.in", "r", stdin);
    freopen("algsort.out", "w", stdout);
    int n, numar;
    scanf("%d", &n);
    int numere[n];
    for (int i = 0; i < n; i++) {
        scanf("%d", &numar);
        numere[i] = numar;
    }
    merge_sort(numere, n);
    for (int i = 0; i < n; i++)
        printf("%d ", numere[i]);
    return 0;
}