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- #include<bits/stdc++.h>
- using namespace std;
- int main()
- {
- int t;
- cin>>t;
- while(t--)
- {
- int n;
- cin>>n;
- vector<int>v;
- for(int i=0; i<n; i++)
- {
- int a;
- cin>>a;
- v.push_back(a);
- }
- int cnt=0;
- int k=v[0];
- for(int i=0; i<v.size(); i++)
- {
- if(abs(v[i]-v[0])<=1)
- cnt++;
- }
- cout<<cnt<<endl;
- }
- }
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