foo.c: In function 'barrier1':
foo.c:5:13: warning: left-hand operand of comma expression has no effect [-Wunused-value]
    5 | {if(x[i]==sx,y[i]==sy+1)
      |             ^
foo.c: In function 'barrier2':
foo.c:10:13: warning: left-hand operand of comma expression has no effect [-Wunused-value]
   10 | {if(x[i]==sx,y[i]==sy-1)
      |             ^
foo.c: In function 'barrier3':
foo.c:15:15: warning: left-hand operand of comma expression has no effect [-Wunused-value]
   15 | {if(x[i]==sx-1,y[i]==sy)
      |               ^
foo.c: In function 'barrier4':
foo.c:20:15: warning: left-hand operand of comma expression has no effect [-Wunused-value]
   20 | {if(x[i]==sx+1,y[i]==sy)
      |               ^
foo.c: In function 'main':
foo.c:37:17: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   37 |         else if(dx=1&&dy==2){barrier1(n,x,y,s,sx,sy);}
      |                 ^~
foo.c:38:21: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   38 |             else if(dx=-1&&dy==-2){barrier1(n,x,y,s,sx,sy);}
      |                     ^~
foo.c:39:17: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   39 |         else if(dx=1&&dy==-2){barrier2(n,x,y,s,sx,sy);}
      |                 ^~
foo.c:40:21: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   40 |             else if(dx=-1&&dy==-2){barrier2(n,x,y,s,sx,sy);}
      |                     ^~
foo.c:41:17: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   41 |         else if(dx=-2&&dy==1){barrier3(n,x,y,s,sx,sy);}
      |                 ^~
foo.c:42:21: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   42 |             else if(dx=-2&&dy==-1){barrier3(n,x,y,s,sx,sy);}
      |                     ^~
foo.c:43:17: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   43 |         else if(dx=2&&dy==1){barrier4(n,x,y,s,sx,sy);}
      |                 ^~
foo.c:44:21: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   44 |             else if(dx=2&&dy==-1){barrier4(n,x,y,s,sx,sy);}
      |                     ^~
foo.c: At top level:
foo.c:46:9: error: expected identifier or '(' before 'if'
   46 |         if(s==1){printf("YES");}
      |         ^~
foo.c:47:9: error: expected identifier or '(' before 'else'
   47 |         else{printf("NO");}
      |         ^~~~
foo.c:48:9: error: expected identifier or '(' before 'return'
   48 |         return 0;
      |         ^~~~~~
foo.c:49:1: error: expected identifier or '(' before '}' token
   49 | }
      | ^

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