foo.cc: In function 'int main()':
foo.cc:27:11: warning: format '%d' expects argument of type 'int', but argument 2 has type 'int (*)[4]' [-Wformat=]
   27 |  printf("%d %.2f",a,v);
      |          ~^       ~
      |           |       |
      |           int     int (*)[4]

[Hydro](https://hydro.ac)提供评测服务