Compilare: user.cpp: In function ‘int main()’: user.cpp:70:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i=0; i<min(unsigned(1000), output.size()); i++ ) ^ user.cpp:62:9: warning: unused variable ‘m’ [-Wunused-variable] int m = strlen(A+1); ^ user.cpp:63:9: warning: unused variable ‘n’ [-Wunused-variable] int n = strlen(B+1); ^