Compilare: main.cpp: In function 'void alakit(std::__cxx11::string)': main.cpp:15:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a.length();++i) ~^~~~~~~~~~~ main.cpp:21:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i<(a.length()-1) && a[i+1]=='0') p=9,++i; ~^~~~~~~~~~~~~~~ main.cpp: At global scope: main.cpp:56:5: warning: 'int main(int)' takes only zero or two arguments [-Wmain] int main(int s) ^~~~ main.cpp: In function 'void alakit(std::__cxx11::string)': main.cpp:14:9: warning: 'p' may be used uninitialized in this function [-Wmaybe-uninitialized] int p; ^