Compilare: main.cpp: In function 'bool checkOk(std::string&, std::string&)': main.cpp:19:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for(int i=0;i<s1.size();++i){ | ~^~~~~~~~~~ main.cpp:24:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for(int i=0;i<s2.size();++i){ | ~^~~~~~~~~~ main.cpp:29:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<bool>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for(int i=0;i<frecv1.size();++i){ | ~^~~~~~~~~~~~~~ main.cpp: In function 'bool SAU(std::string&, int&)': main.cpp:45:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | while(pozi<s.size() && s[pozi]=='|'){ | ~~~~^~~~~~~~~ main.cpp: In function 'bool EXCLUSIV(std::string&, int&)': main.cpp:55:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 55 | while(pozi<s.size() && s[pozi]=='^'){ | ~~~~^~~~~~~~~ main.cpp: In function 'bool SI(std::string&, int&)': main.cpp:64:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 64 | while(pozi<s.size() && s[pozi]=='&'){ | ~~~~^~~~~~~~~ main.cpp: In function 'bool expresie(std::string&, int&)': main.cpp:75:10: warning: unused variable 'a' [-Wunused-variable] 75 | char a=s[pozi+1]; | ^