Ruudukko

input/code.cpp: In function 'int main()':
input/code.cpp:11:14: error: 'x' was not declared in this scope
         cin>>x;
              ^
input/code.cpp:31:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j=0; j<v.size();j++){
                      ~^~~~~~~~~
input/code.cpp:44:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<u.size();i++){
                 ~^~~~~~~~~

#include <bits/stdc++.h>
using namespace std;
int main() {
    int n;
    cin>>n;
    
    
    vector<vector<char>>v;
    vector<int>u;
    for(int i=0;i<n;i++){
        cin>>x;
        vector<char>f;
        f.push_back('a');
        char muisti ='a';
        for(int j=1;j<x.size();j++){
            int y=0;
            while(y<j){
                if(x[y]==x[j]){
                    f.push_back(f[y]);
                    break;
                }
                y++;
            }
            if(y==j){
                muisti++;
                f.push_back(muisti);
            }
        }
        
        bool totuus=true;
        for(int j=0; j<v.size();j++){
            if(v[j]==f){
                u[j]++;
                totuus=false;
                break;
            }
        }
        if(totuus){
            v.push_back(f);
            u.push_back(1);
        }
    }
    int s=0;
    for(int i=0;i<u.size();i++){
        s +=u[i]*(u[i]-1)/2;
    }
    cout<<s;
}