Cod sursa(job #3343007)

Utilizator AlexandruCorneaCornea Alexandru Mihai AlexandruCornea Data 26 februarie 2026 12:59:05
Problema Sortare prin comparare Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.72 kb
#include <bits/stdc++.h>

using namespace std;
ifstream fin ("algsort.in");
ofstream fout ("algsort.out");
const int MOD=9917;
int v[500002],aux[500002],nrinv;
void interclas(int v[],int st,int dr)
{
    int m=(st+dr)/2,i=st,j=m+1,k=st-1;
    while (i<=m && j<=dr)
    {
        if (v[i]<=v[j])
        {

            aux[++k]=v[i++];
        }
        else
        {
            aux[++k]=v[j++];
            nrinv=(nrinv+m-i+1)%MOD;
        }
    }
    while (i<=m)
    {
        aux[++k]=v[i++];
    }
    while (j<=dr)
    {
        aux[++k]=v[j++];
    }
    for (int i=st; i<=dr; i++)
    {
        v[i]=aux[i];
    }
}
void ms(int v[],int st,int dr)
{
    if (st>=dr)
        return;
    int m=(st+dr)/2;
    ms(v,st,m);
    nrinv%=MOD;
    ms(v,m+1,dr);
    nrinv%=MOD;
    interclas(v,st,dr);
    nrinv%=MOD;
}



void part(int v[],int st,int dr, int &p1,int &p2)
{
    int i=st;
    p2=dr-1;
    p1=st;
    while (i<=p2)
    {
        if (v[i]<v[dr])
        {
            swap(v[i],v[p1]);
            i++;
            p1++;

        }
        if (v[i]>v[dr])
        {
            swap(v[i],v[p2]);
            p2--;
        }
        else i++;
    }
    p2++;
    swap(v[p2],v[dr]);
}

void qs(int v[],int st,int dr)
{
    if (st>=dr)
        return;
    int p1,p2;
    part(v,st,dr,p1,p2);
    qs(v,st,p1-1);
    qs(v,p2+1,dr);
}
int main()
{
    int n;
    fin>>n;
    for (int i=1; i<=n; i++)
    {
        fin>>v[i];
    }
    srand(time(NULL));
    for (int i=n; i>=1; i--)
    {
        int p=rand()%i;
        p=max(1,p);
        swap(v[i],v[p]);
    }

    qs(v,1,n);
    for (int i=1; i<=n; i++)
        fout<<v[i]<<" ";
    return 0;
}