Compilare: main.cpp: In function 'void precalc()': main.cpp:27:15: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else] 27 | if(((1 << b)&i) == 1) | ^ main.cpp:32:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | for(int it = 0; it < masca.size(); it++) | ~~~^~~~~~~~~~~~~~