t=int(input())
for i in range(t):
x=input()
n=int(x.split()[0])
m=int(x.split()[1])
a=input()
a1=a.split()
for i in range(n):
a1[i]=int(a1[i])
if m>sum(a1): print(0)
else: print(sum(a1)-m)
#include <bits/stdc++.h>
using namespace std;
int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int l;
cin>>l;
while(l--){
int a, k;
cin>>a>>k;
int x, add = 0;
for(int i = 0; i < a; i++){
cin>>x;
add += x;
}
if(add - k <= 0){
cout<<0<<"\n";
}
else{
cout<<(add-k)<<"\n";
}
}
}454B - Little Pony and Sort by Shift | 1152A - Neko Finds Grapes |
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409H - A + B Strikes Back | 1262A - Math Problem |
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1428A - Box is Pull | 234B - Reading |
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