Cod sursa(job #2542800)
Utilizator | Gaina Florin Florinos123 | Data | 10 februarie 2020 16:43:13 |
---|---|---|---|
Problema | Dezastru | Scor | 80 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva de probleme | Marime | 0.62 kb |
#include <fstream>
using namespace std;
ifstream f ("dezastru.in");
ofstream g ("dezastru.out");
int n, k, i, nr, sol[30];
double rez, v[30];
void adauga ()
{
double aux = 1;
int i;
for (i=1; i<=k; i++)
aux *= v[sol[i]];
rez += aux;
}
void bkt (int poz)
{
for (int i=sol[poz-1]+1; i<=n; i++)
{
sol[poz] = i;
if (poz == k)
{
nr ++;
adauga();
}
else
bkt(poz+1);
}
}
int main()
{
f >> n >> k;
for (i=1; i<=n; i++)
f >> v[i];
bkt(1);
rez /= nr;
g << rez;
return 0;
}