Cod sursa(job #3241198)

Utilizator Gabriel_DaescuDaescu Gabriel Florin Gabriel_Daescu Data 27 august 2024 15:51:04
Problema Sortare prin comparare Scor 80
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.96 kb
#include <fstream>
#include <vector>
#include <cstdlib>
#include <ctime>
using namespace std;
int n,i,v[500009];

class InParser
{
    vector<char> str;
    int ptr;
    ifstream fin;

    char getChar()
    {
        if (ptr == int(str.size()))
        {
            fin.read(str.data(), str.size());
            ptr = 0;
        }
        return str[ptr++];
    }

    template<class T>
    T getInt()
    {
        char chr = getChar();
        while (!isdigit(chr) && chr != '-')
            chr = getChar();
        int sgn = +1;
        if (chr == '-')
        {
            sgn = -1;
            chr = getChar();
        }
        T num = 0;
        while (isdigit(chr))
        {
            num = num * 10 + chr - '0';
            chr = getChar();
        }
        return sgn * num;
    }

public:
    InParser(const char* name) : str(1e5), ptr(str.size()), fin(name) { }
    ~InParser()
    {
        fin.close();
    }

    template<class T>
    friend InParser& operator>>(InParser& in, T& num)
    {
        num = in.getInt<T>();
        return in;
    }
};

int Divide(int st, int dr)
{
    int poz,pivot;

    poz=st+rand()%(dr-st+1);
    swap(v[st],v[poz]);
    pivot=v[st];

    while(st<dr)
    {
        while(st<dr && v[dr]>=pivot)
        {
            dr--;
        }
        v[st]=v[dr];

        while(st<dr && v[st]<=pivot)
        {
            st++;
        }
        v[dr]=v[st];
    }

    v[st]=pivot;

    return st;
}

void Quick_Sort(int st, int dr)
{
    int poz;
    if(st<dr)
    {
        poz=Divide(st,dr);
        Quick_Sort(st,poz-1);
        Quick_Sort(poz+1,dr);
    }
}

int main()
{
    InParser  fin("algsort.in");
    ofstream fout("algsort.out");
    srand(time(NULL));

    fin>>n;

    for(i=1; i<=n; i++)
    {
        fin>>v[i];
    }

    Quick_Sort(1,n);

    for(i=1; i<=n; i++)
    {
        fout<< v[i] << " ";
    }

    return 0;
}