Compilare: user.cpp: In function ‘int main()’: user.cpp:60:33: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[300]’ [-Wformat=] scanf("%s", &formula[lin][col]); ^ user.cpp: In function ‘long long int solve(int, int)’: user.cpp:34:31: warning: ‘k’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (recurse == false || j < k) ^