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- #include <iostream>
- using namespace std;
- int main()
- {
- int a,b,c,ar1[4000],ar2[4000],ar3[4000],res=0;
- cin>>a;
- for(int i=0;i<a;i++)
- cin>>ar1[i];
- cin>>b;
- for(int i=0;i<b;i++)
- cin>>ar2[i];
- cin>>c;
- for(int i=0;i<c;i++)
- cin>>ar3[i];
- for(int i=0;i<a;i++)
- for(int j=0;j<b;j++)
- if(ar1[i]==ar2[j])
- for(int z=0;z<c;z++)
- if(ar2[j]==ar3[z])
- ++res;
- cout<<res;
- }
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