from sys import stdin
from collections import Counter
def readint():
return int(stdin.readline())
def readarray(typ):
return list(map(typ, stdin.readline().split()))
if __name__ == "__main__":
t = readint()
for _ in range(t):
n = readint()
A = readarray(int)
c_whole = Counter(A)
final_index = n - c_whole[1]
c_partial = Counter(A[:final_index])
print(c_partial[1])#include<bits/stdc++.h>
using namespace std;
int main(){
int t;
cin>>t;
while(t--){
int n;
cin>>n;
int arr[n];
for(int i=0;i<n;i++){
cin>>arr[i];
}
int i=0,j=n-1,ans=0;
while(i<j){
if(arr[i]==0){
i++;
continue;
}
if(arr[j]==1){
j--;
continue;
}
ans++;
i++;
j--;
}
cout<<ans<<"\n";
}
return 0;
}289B - Polo the Penguin and Matrix | 1716A - 2-3 Moves |
1670B - Dorms War | 1716B - Permutation Chain |
987A - Infinity Gauntlet | 1676G - White-Black Balanced Subtrees |
1716D - Chip Move | 1352F - Binary String Reconstruction |
1487B - Cat Cycle | 1679C - Rooks Defenders |
56A - Bar | 1694B - Paranoid String |
35A - Shell Game | 1684A - Digit Minimization |
43B - Letter | 1017A - The Rank |
1698B - Rising Sand | 235A - LCM Challenge |
1075B - Taxi drivers and Lyft | 1562A - The Miracle and the Sleeper |
1216A - Prefixes | 1490C - Sum of Cubes |
868A - Bark to Unlock | 873B - Balanced Substring |
1401D - Maximum Distributed Tree | 1716C - Robot in a Hallway |
1688B - Patchouli's Magical Talisman | 99A - Help Far Away Kingdom |
622B - The Time | 1688C - Manipulating History |