func_code_string: #include <bits/stdc++.h>   template <class T>   T max(T a, T b, T c) {     return max(a, max(b, c));   }   using namespace std;   int main() {     cin.tie(NULL), ios_base::sync_with_stdio(false);     int t;     cin >> t;     while (t--) {       int a, b;       cin >> a >> b;       if (a > b) {         if ((b - a) % 2 == 0)           cout << 1 <<   n ;         else           cout << 2 <<   n ;       } else if (a == b)         cout << 0 <<   n ;       else {         if ((b - a) % 2 != 0)           cout << 1 <<   n ;         else           cout << 2 <<   n ;       }     }   }   