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#include
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using namespace std;
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int main()
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{
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int t;
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cin>>t;
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int n;
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int c;
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int count2=0;
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while(t>0)
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{
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cin>>n;
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cin>>c;
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int a[n];
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for( int i=0;i<n;i++)
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{
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cin>>a[i];
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}
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for(int i=0;i<n;i++)
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{
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int count1=0;
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while(a[i]>0)
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{
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a[i]=a[i]/10;
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count1++;
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}
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if(count1==c)
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{
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count2++;
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}
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}
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cout<<count2;
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t–;
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}
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return 0;
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}
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