#include <iostream> using namespace std; long long fib(int n) { long long f0 = 1; long long f1 = 1; if (n <= 1) return 1; while (n >= 2) { long long f2 = f0 + f1; f0 = f1; f1 = f2; n--; } return f1; } int main() { int n; while (cin >> n) { while (n--) { int a, b; cin >> a >> b; cout << fib(b - a ) << endl; } } }