Cod sursa(job #2849824)

Utilizator biancalautaruBianca Lautaru biancalautaru Data 15 februarie 2022 20:36:10
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.82 kb
#include <fstream>
#define DIM 500001
using namespace std;
ifstream fin("algsort.in");
ofstream fout("algsort.out");
int n,i,a[DIM],b[DIM];

void interclasare(int st,int mid,int dr) {
    int i=st;
    int j=mid+1;
    int k=st-1;
    while (i<=mid && j<=dr)
        if (a[i]<a[j])
            b[++k]=a[i++];
        else
            b[++k]=a[j++];
    while (i<=mid)
        b[++k]=a[i++];
    while (j<=dr)
        b[++k]=a[j++];
    for (int i=st;i<=dr;i++)
        a[i]=b[i];
}

void sortare(int st,int dr) {
    if (st<dr) {
        int mid=(st+dr)/2;
        sortare(st,mid);
        sortare(mid+1,dr);
        interclasare(st,mid,dr);
    }
}

int main() {
    fin>>n;
    for (i=1;i<=n;i++)
        fin>>a[i];
    sortare(1,n);
    for (i=1;i<=n;i++)
        fout<<a[i]<<" ";
    return 0;
}