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- #include<bits/stdc++.h>
- using namespace std;
- int main()
- {
- int t;
- cin>>t;
- while(t--)
- {
- int n;
- cin>>n;
- int ara[n+1];
- for(int i=0;i<n;i++)
- {
- cin>>ara[i];
- }
- sort(ara,ara+n);
- int ans=ara[n-2]-1;
- ans=min(n-2,ans);
- cout<<ans<<endl;
- }
- }
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