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- #include <bits/stdc++.h>
- using namespace std;
- int main() {
- int t;
- cin>>t;
- while(t--){
- int n;
- string s;
- cin>>n>>s;
- int ans = 0;
- for(int i=0; i<n; i++)
- {
- if(i<n-1 && s[i]=='*' && s[i+1]=='*') break;
- ans += (s[i] == '@');
- }
- cout<<ans<<"\n";
- }
- }
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