Eroare de compilare: main.cpp: In function 'void solve()': main.cpp:13:22: error: 'vals' was not declared in this scope 13 | if ((vals[j].size() >= 2) || (freq[j] % 2 == 1)) { | ^~~~ main.cpp: In function 'int main()': main.cpp:33:33: error: 'vals' was not declared in this scope 33 | vals[j].insert(arr[i]); | ^~~~ main.cpp:47:41: error: 'vals' was not declared in this scope 47 | vals[j].erase(arr[u]); | ^~~~ main.cpp:52:33: error: 'vals' was not declared in this scope 52 | vals[j].insert(v); | ^~~~ Non zero exit status: 1