/in/foo.cc: In function 'void dfs(int)':
/in/foo.cc:82:12: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   if(c[i]=0) {c[i]=1;dfs(x+1);c[i]=0;}
            ^
/in/foo.cc:86:1: error: a function-definition is not allowed here before '{' token
 {
 ^
/in/foo.cc:103:1: error: expected '}' at end of input
 }
 ^