func_code_string: #include <bits/stdc++.h>   #pragma comment(linker,  /STACK:102400000,102400000 )   using namespace std;   unordered_set<int> dict;   int main() {     long long a, b, x;     cin >> x >> a >> b;     if (a % x != 0) {       a += x - (a % x + x) % x;     }     if (a > b) {       cout << 0 << endl;     } else {       cout << (b - a + x) / x << endl;     }     return 0;   }   