foo.c: In function 'main':
foo.c:11:19: warning: left-hand operand of comma expression has no effect [-Wunused-value]
   11 |         while(x>=3,y>=4)
      |                   ^
foo.c:14:23: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
   14 |                 x =i+x%3;
      |                      ~^~

[Hydro](https://hydro.ac)提供评测服务