A Subtask Problem codechef solution in cpp
#include <iostream>
using namespace std;
int main() {
int t;
cin >> t;
while (t--) {
int n, k;
cin >> n >> k;
int a[n];
for (int i = 0; i < n; i++) {
cin >> a[i];
}
int minVal = a[0];
for (int i = 1; i < n; i++) {
if (a[i] < minVal) {
minVal = a[i];
}
}
int res = (k - minVal > 0) ? k - minVal : 0;
cout << res << endl;
}
return 0;
}