Răspuns:
#include <iostream>
using namespace std;
bool termeniConsecutivi(int a, int b){
int c = b - a;
if (c == 0 && a == 1)return true;
if (c < 0)return false;
return termeniConsecutivi(c, a);
}
int main(){
int a,b; cin>> a>>b;
if(a>b){
int c = a;
a = b;
b = c;
}
cout << ((a == 0 && b == 1) || termeniConsecutivi(a,b) ? "" : "nu ") << "sunt termeni consecutivi in sirul lui Fibonacci";
}
