#include <iostream>
using namespace std;
long int fib(int n) {
int a=1;
int b=1;
for (int i=3; i<=n; i++) {
int pom=a;
a=b;
b=pom+b;
}
return b;
}
int main() {
cout<<fib(4)<<" , "<<fib(11)<<endl;
cout<<endl;
return 0;
}
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