/in/P5.cpp: In function 'int main()':
/in/P5.cpp:57:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<str.size();i++)
                 ~^~~~~~~~~~~
/in/P5.cpp:65:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
                 while(i<str.size()&&str[i]>='0'&&str[i]<='9')
                       ~^~~~~~~~~~~
/in/P5.cpp:76:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
                 while(i<str.size()&&str[i]>='0'&&str[i]<='9')
                       ~^~~~~~~~~~~
/in/P5.cpp:97:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i=0; i<vint.size(); i++) cout << vint[i] << " ";
                   ~^~~~~~~~~~~~