/in/foo.cc: In function 'int main()':
/in/foo.cc:55:17: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
     if(b[i-1]!=3&&a[i-1]>0||b[i+1]!=3&&a[i+1]>0){
        ~~~~~~~~~^~~~~~~~~~
/in/foo.cc:83:13: error: '_sleep' was not declared in this scope
   _sleep(100);
             ^