#include<bits/stdc++.h>
using namespace std;
typedef long long int int64;
#define MOD 1000000007



int main() {

	int T; cin >> T;

	while (T--) {

		int a, b; cin >> a >> b;

		if (a == b) cout << "0\n";
		else if (a > b && abs(a - b)%2 == 0) cout << "1\n";
		else if (a > b && abs(a - b)%2 == 1)   cout << "2\n";
		else if (a < b && abs(a - b)%2 == 0)   cout << "2\n";
		else if (a < b && abs(a - b)%2 == 1) cout << "1\n";

	}

}