foo.cc: In function ‘int main()’:
foo.cc:6:17: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[1000000000]’ [-Wformat=]
    6 |         scanf("%s",&arr);
      |                ~^  ~~~~
      |                 |  |
      |                 |  char (*)[1000000000]
      |                 char*
foo.cc:11:18: warning: comparison of integer expressions of different signedness: ‘int’ and ‘size_t’ {aka ‘long unsigned int’} [-Wsign-compare]
   11 |         for(i=0;i<strlen(arr);i++)
      |                 ~^~~~~~~~~~~~

正在同步测试数据，请稍后