#include<bits/stdc++.h> using namespace std; using ll = long long; int main(){ int t; cin>>t; while(t--){ int n; cin>>n; int ans = 0; for(int i = 0;i<n;i++){ int a; cin>>a; ans += a; } ans = n - ans; if(ans==0) ans = 1; else ans--; cout<<ans<<endl; } }