func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int t;     cin >> t;     while (t--) {       int a, b;       cin >> a >> b;       if (a == b)         cout << 0 << endl;       else if ((a < b && (b - a) % 2 == 1) || ((a > b) && (a - b) % 2 == 0)) {         cout << 1 << endl;       } else if ((a < b && (b - a) % 2 == 0) || ((a > b) && (a - b) % 2 == 1)) {         cout << 2 << endl;       }     }     return 0;   }   