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Embedding Custom Library

int fak(int n) {

int i;

int fac;

for (i = 1, fac = 1; i <= n; i++)

fac *= i;

return fac;

}

int komb(int k, int n) {

int res;

res = fak(n) / (fak(k) * fak(n - k));

return res;

}