No of elements in union of arrays  

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#include <iostream> using namespace std; int main() { int c=0; int m,n; cin>>m; cin>>n; int A[m]; int B[n]; for(int i=0 ; i<m; i++){ cin>>A[i]; } for(int q=0 ; q<n; q++){ cin>>B[q]; } for(int j=0 ;j<m; j++ ){ for(int k=0;k<n; k++ ){ if(A[j]==B[k]){ c++; break; } } } cout<<m+n-c; }
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