func_code_string: #include <bits/stdc++.h>   using namespace std;   int gcd(int a, int b) {     if (a == 0) return b;     if (b == 0) return a;     if (a == b) return a;     if (a > b) return gcd(a - b, b);     return gcd(a, b - a);   }   void sol() {     long long int L, v, l, r, count = 0;     cin >> L >> v >> l >> r;     long long int p = L / v;     long long int q = (r / v) - ((l - 1) / v);     cout << p - q << endl;   }   int main() {     int t;     cin >> t;     while (t--) sol();   }   