/in/foo.cc: In function 'bool check(int, int)':
/in/foo.cc:16:26: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
         if(e[i].y==e[j].y&&e[i].b==e[j].b||e[i].y==e[j].b&&e[i].b==e[j].y){
            ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
/in/foo.cc:25:26: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
         if(e[i].x==e[j].x&&e[i].a==e[j].a||e[i].x==e[j].a&&e[i].a==e[j].x){
            ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~