Cod sursa(job #254464)

Utilizator GavrilaVladGavrila Vlad GavrilaVlad Data 7 februarie 2009 12:18:26
Problema Planeta Scor 100
Compilator cpp Status done
Runda Stelele Informaticii 2009, clasele 9-10, ziua 2 Marime 0.92 kb
#include <stdio.h>

using namespace std;

long long n, i, j, k, d[40], f[40], sol[40], poz, m;

void back(long l, long r)
{
    long i;
    if(l>r) return;
    for(i=l; i<=r; i++)
    {
        if(f[i]==0)
        {
            if(d[i-l]*d[r-i]*m>=k)
            {
                break;
            }
            else
            {
                k=k-d[i-l]*d[r-i]*m;
            }
        }
    }
    if(i>r) i=r;
    m=m*d[r-i];
    poz++;
    sol[poz]=i;
    f[i]=1;
    back(l, i-1);
    m=m/d[r-i];
    back(i+1, r);
}
int main()
{
    freopen("planeta.in", "r", stdin);
    freopen("planeta.out", "w", stdout);
    scanf("%d %lld\n", &n, &k);
    d[0]=1;
    for(i=1; i<=n; i++)
    {
        for(j=1; j<=i; j++)
        {
            d[i]+=d[i-j]*d[j-1];
        }
    }
    m=1;
    back(1, n);
    for(i=1; i<=n; i++)
    {
        printf("%d ", sol[i]);
    }
    return 0;
}