t = int(input())
for _ in range(t):
a, b = map(int, input().split())
if a <= b:
print(b - a)
elif a % 2 == b % 2:
print(0)
else:
print(1)
#include <bits/stdc++.h>
#define ll long long int
using namespace std;
int main() {
ios_base::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
int t;
cin >> t;
while(t--) {
ll n, k;
cin >> n >> k;
if(n <= k) {
cout << k - n << "\n";
continue;
}
ll x = 0;
while(2 * x + k <= n) {
x++;
}
ll a1 = 2 * x + k;
ll a2 = 2 * (x - 1) + k;
cout << min(abs(a1 - n), abs(a2 - n)) << "\n";
}
return 0;
}298B - Sail | 239A - Two Bags of Potatoes |
1704E - Count Seconds | 682A - Alyona and Numbers |
44A - Indian Summer | 1133C - Balanced Team |
1704A - Two 0-1 Sequences | 1467A - Wizard of Orz |
1714E - Add Modulo 10 | 1714A - Everyone Loves to Sleep |
764A - Taymyr is calling you | 1714B - Remove Prefix |
1264F - Beautiful Fibonacci Problem | 52A - 123-sequence |
1543A - Exciting Bets | 1714D - Color with Occurrences |
215B - Olympic Medal | 1445A - Array Rearrangment |
1351A - A+B (Trial Problem) | 935B - Fafa and the Gates |
1291A - Even But Not Even | 1269A - Equation |
441A - Valera and Antique Items | 1702C - Train and Queries |
816B - Karen and Coffee | 838D - Airplane Arrangements |
148B - Escape | 847G - University Classes |
1110A - Parity | 1215B - The Number of Products |