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This is the right solution, sorry:
- p.camarillor June 23, 2014cout << "give me number of stairs:" << endl;
cin >> n;
int formas = 1;
int cantidad1s = n;
int cantidad2s = 1;
int tmp;
while((n - (2*cantidad2s)) > 0)
{
cantidad1s = n - (2*cantidad2s);
formas += factorial(cantidad1s + cantidad2s)/
(factorial(cantidad1s)*factorial(cantidad2s));
cantidad2s++;
}
cout << "ways to climb to the stairs:" << formas << endl;