Compilare: user.cpp: In function ‘int main()’: user.cpp:29:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(x) && strlen(x)-i+1>=Max;i++) ^ user.cpp:29:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(x) && strlen(x)-i+1>=Max;i++) ^ user.cpp:35:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(k<strlen(x) && y>=0){ ^