foo.cpp: In function 'int main()':
foo.cpp:18:15: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[1000005]' [-Wformat=]
  scanf("%s",&s);n=strlen(s);getnext();
               ^
foo.cpp:20:42: error: 'T' was not declared in this scope
  for(int i=n-1;i>=0;i--) if (sum[i]==0) {T=i;break;}
                                          ^
foo.cpp:21:8: error: 'T' was not declared in this scope
  if (s[T-1]==s[n-1])
        ^