Compilare: main.cpp: In function 'int f(std::__cxx11::string, std::__cxx11::string)': main.cpp:10:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a.size(); i ++) ~~^~~~~~~~~~ main.cpp:13:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < b.size(); j ++) ~~^~~~~~~~~~ main.cpp:22:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i == a.size() - 1 && t >= b.size()) ~~^~~~~~~~~~~~~~~ main.cpp:22:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i == a.size() - 1 && t >= b.size()) ~~^~~~~~~~~~~ main.cpp:24:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(t >= b.size()) ~~^~~~~~~~~~~ main.cpp:9:9: warning: unused variable 'okk' [-Wunused-variable] int okk = 1; ^~~ main.cpp: In function 'bool cmp(std::__cxx11::string, std::__cxx11::string)': main.cpp:38:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < a.size(); i ++) ~~^~~~~~~~~~