/in/foo.cc: In function 'int main()':
/in/foo.cc:13:22: warning: too many arguments for format [-Wformat-extra-args]
    {scanf("%d",&x,y,k);}
                      ^
/in/foo.cc:22:13: warning: left operand of comma operator has no effect [-Wunused-value]
      if (i-d<x,i+d<y)
          ~~~^~
/in/foo.cc:13:10: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
    {scanf("%d",&x,y,k);}
     ~~~~~^~~~~~~~~~~~~
/in/foo.cc:13:10: warning: 'k' may be used uninitialized in this function [-Wmaybe-uninitialized]
/in/foo.cc:23:9: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
      ans++;
      ~~~^~