Compilare: main.cpp: In function 'void gethash(int)': main.cpp:24:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1 ; i < S [line].size () ; ++ i){ ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'bool match(std::__cxx11::string, std::__cxx11::string, int, int)': main.cpp:77:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1 ; i < A.size () ; ++ i){ ~~^~~~~~~~~~~ main.cpp:81:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = A.size () ; i < B.size () ; ++ i){ ~~^~~~~~~~~~~ main.cpp: In function 'int getEdge(int, int)': main.cpp:92:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < min (S [x].size () , S [y].size ()) ; ++ i) ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:134:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0 ; k < v [j].size () ; ++ k) ~~^~~~~~~~~~~~~~~ main.cpp:160:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = C [sol [i - 1]][sol [i]] ; j < S [sol [i]].size () ; ++ j) ~~^~~~~~~~~~~~~~~~~~~~~