#include <bits/stdc++.h>
#pragma GCC target("avx2")
#pragma GCC optimization("O3")
#pragma GCC optimization("unroll-loops")
using namespace std;
using ll = long long;
using ull = unsigned long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
template <typename T>
T add(T x, T y, T m) {
  return ((x % m) + (y % m)) % m;
}
template <typename T>
T mul(T x, T y, T m) {
  return ((x % m) * (long long)(y % m)) % m;
}
template <typename T>
T sub(T x, T y, T m) {
  return add(x, -y + m);
}
template <typename T>
T gcd(T a, T b) {
  return b ? gcd(b, a % b) : a;
}
template <typename T>
T lcm(T a, T b) {
  return a / gcd(a, b) * b;
}
int lg2(long long x) { return 64 - __builtin_clzll(x) - 1; }
int lg2(int x) { return 32 - __builtin_clzll(x) - 1; }
struct pair_hash {
  template <class T1, class T2>
  size_t operator()(const pair<T1, T2> &p) const {
    auto h1 = hash<T1>{}(p.first);
    auto h2 = hash<T2>{}(p.second);
    return h1 ^ h2;
  }
};
const int MAXN = 2e5 + 5;
const int MOD = 1e9 + 7;
const int INF = 0x3f3f3f3f;
const long long int LLINF = 0x3f3f3f3f3f3f3f3f;
const double EPS = 1e-9;
const double PI = acos(-1);
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr);
  int tc;
  cin >> tc;
  while (tc--) {
    ll a, b;
    cin >> a >> b;
    int ans = 0;
    if (a < b) {
      if ((b - a) & 1)
        ans = 1;
      else
        ans = 2;
    } else if (a > b) {
      if ((a - b) % 2 == 0)
        ans = 1;
      else
        ans = 2;
    }
    cout << ans << '\n';
  }
  return 0;
}
