/in/foo.c: In function 'main':
/in/foo.c:29:5: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
  if(b[a[m]%10]=b[a[n]%10])
     ^
/in/foo.c:29:4: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else]
  if(b[a[m]%10]=b[a[n]%10])
    ^
/in/foo.c:29:19: warning: 'n' is used uninitialized in this function [-Wuninitialized]
  if(b[a[m]%10]=b[a[n]%10])
                  ~^~~
/in/foo.c:29:8: warning: 'm' is used uninitialized in this function [-Wuninitialized]
  if(b[a[m]%10]=b[a[n]%10])
       ~^~~