Cod sursa(job #1413278)

Utilizator rares96cheseliRares Cheseli rares96cheseli Data 1 aprilie 2015 19:32:38
Problema Combinari Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.51 kb
#include <fstream>
#include <algorithm>
using namespace std;
ifstream f("combinari.in");
ofstream g("combinari.out");

int N, used[20], st[20], K;

void print()
{
    for (int i=1; i<=K; ++i)
        g<<st[i]<<' '; g<<'\n';
}

void backtr(int vf)
{
    if (vf>K) { print(); return; }
    for (int i=st[vf-1]+1; i<=N; ++i)
        if (!used[i])
        {
            used[i]=1; st[vf]=i;
            backtr(vf+1); used[i]=0;
        }
}

int main()
{
    f>>N>>K; backtr(1);
    return 0;
}