Compilare: main.cpp: In function 'int eval(std::string&, size_t&, int)': main.cpp:39:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | if (priority == ops.size()) { | ~~~~~~~~~^~~~~~~~~~~~~ main.cpp: In function 'int applyOp(int, int, char)': main.cpp:27:1: warning: control reaches end of non-void function [-Wreturn-type] 27 | } | ^