/in/foo.cc: In function 'void init()':
/in/foo.cc:58:26: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[1000010]' [-Wformat=]
         scanf("%s",&a_chs);
                          ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:93:22: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[1000010]' [-Wformat=]
     scanf("%s",&a_chT);
                      ^
/in/foo.cc:94:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0; i<strlen(a_chT); i++)
                  ~^~~~~~~~~~~~~~