/in/foo.cc: In function 'int main()':
/in/foo.cc:66:21: warning: 'end' may be used uninitialized in this function [-Wmaybe-uninitialized]
    for(int i=start;i<=end;i++)
                    ~^~~~~
/in/foo.cc:42:8: warning: 'start' may be used uninitialized in this function [-Wmaybe-uninitialized]
    int start,end;
        ^~~~~