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- #include <iostream>
- using namespace std;
- int sumcif(int x)
- {
- int s=0;
- while(x)
- {
- s+=x%10;
- x/=10;
- }
- return s;
- }
- int main()
- {
- int n,i,j,C=0;
- cin>>n;
- int v[n];
- for(i=0;i<n;i++)
- cin>>v[i];
- for(i=0;i<n;i++)
- for(j=i+1;j<n;j++)
- if(sumcif(v[i])==sumcif(v[j]))
- C++;
- cout<<C;
- }
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