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;
} 1302. Deepest Leaves Sum | 1209. Remove All Adjacent Duplicates in String II |
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