Compilare: user.cpp:24:24: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] bool precalc[1 << NMAX + 10]; ^ user.cpp: In function ‘void read(int)’: user.cpp:34:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] ind[str[0]] = it; ^ user.cpp: In function ‘int main()’: user.cpp:72:55: warning: array subscript has type ‘char’ [-Wchar-subscripts] stMt[++vfMt] = subm & (1 << ind[str[i]]); ^ user.cpp:99:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < sol.size(); i++) ~~^~~~~~~~~~~~