Compilare: user.cpp: In function ‘int subsir(std::__cxx11::string, std::__cxx11::string)’: user.cpp:13:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<n && j<m; i++) ~^~ user.cpp:13:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<n && j<m; i++) ~^~ user.cpp:15:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j >= m) return 1; ~~^~~~ user.cpp: In function ‘int main()’: user.cpp:22:13: warning: unused variable ‘nrt’ [-Wunused-variable] int i,p,nrt=0,ct,j; ^~~ user.cpp:22:19: warning: unused variable ‘ct’ [-Wunused-variable] int i,p,nrt=0,ct,j; ^~