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- #include<bits/stdc++.h>
- using namespace std;
- int main()
- {
- int n,i,j,k,l,o;
- string s,s2;
- cin>>n;
- getchar();
- while(n)
- {
- getline(cin,s);
- j=sqrt(s.length());
- cout<<j<<endl;
- if(j*j!=s.length())
- cout<<"INVALID"<<endl;
- else
- {
- for(i=0; i<s.length(); i++)
- {
- for(l=i; l<s.length(); l+=j)
- {
- s2+=s[l];
- }
- if(s2.length()==j*j)
- break;
- }
- cout<<s2<<endl;
- }
- for(o=0; o<s.length(); o++)
- {
- s2[o]=0;
- }
- n--;
- }
- }
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