no

In C++, the solution function prototype is bool validSolution(unsigned int board[9][9]), and the input is a 2D array.
Did you change the original setup?

So, i must validate only one row?

this is a 2D array. so its type is int anyways.

in my function is board only array of ints not array of arrays of ints, why?

s1.insert(i, s2);
it isnt work, why? i remove const and it still didnt work