func_code_string: #include <bits/stdc++.h>   using namespace std;   const int maxn = 1e2 + 5;   const int INF = 1e9 + 5;   const int mod = 1000000007;   const double eps = 1e-7;   long long gcd(long long a, long long b) {     if (b == 0) return a;     return gcd(b, a % b);   }   int main() {     long long a, b, k;     while (cin >> k >> a >> b) {       if (b <= 0) {         a = -a;         b = -b;         swap(a, b);       }       long long ans = b / k - a / k;       if (a % k == 0 || a < 0) ans++;       cout << ans << endl;     }     return 0;   }   