/in/foo.cc: In function 'int main()':
/in/foo.cc:26:13: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   if(a[i]==0&&b[i]==2||a[i]==2&&b[i]==5||a[i]==5&&b[i]==0){
      ~~~~~~~^~~~~~~~~
/in/foo.cc:26:49: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   if(a[i]==0&&b[i]==2||a[i]==2&&b[i]==5||a[i]==5&&b[i]==0){
                                          ~~~~~~~^~~~~~~~~
/in/foo.cc:29:13: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   if(a[i]==2&&b[i]==0||a[i]==5&&b[i]==2||a[i]==0&&b[i]==5){
      ~~~~~~~^~~~~~~~~
/in/foo.cc:29:49: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   if(a[i]==2&&b[i]==0||a[i]==5&&b[i]==2||a[i]==0&&b[i]==5){
                                          ~~~~~~~^~~~~~~~~