Cod sursa(job #2898410)

Utilizator Xutzu358Ignat Alex Xutzu358 Data 6 mai 2022 17:44:38
Problema Sortare prin comparare Scor 20
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.95 kb
#include <bits/stdc++.h>
using namespace std;

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

int n;
int v[500005];

void read() {
    f >> n;
    for (int i=1;i<=n;i++) {
        f >> v[i];
    }
}

void merge_sort(int st, int dr) {
    if (st!=dr) {
        int mij = (st+dr)/2;
        merge_sort(st,mij);
        merge_sort(mij+1,dr);
        int cop[500005];
        int ind=0;
        int ind1=st,ind2=mij+1;
        while (ind!=dr-st+1) {
            if ((v[ind1]<=v[ind2] && ind1!=mij+1) || (ind2==dr+1)) {
                cop[++ind] = v[ind1];
                ind1++;
            }
            else {
                cop[++ind] = v[ind2];
                ind2++;
            }
        }
        ind=0;
        for (int i=st;i<=dr;i++) {
            v[i] = cop[++ind];
        }
    }
}

int main()
{
    read();
    merge_sort(1,n);
    for (int i=1;i<=n;i++) {
        g << v[i] << ' ';
    }
    return 0;
}