Arthur own ski resort mountain there n land spot mountain number 1 n foot mountain the spot connect onedirectional ski track all track foot mountain direct cycle form track there track leave spot track enter spota skier start ski spot stop spot sequence track lead start spot end end spot unfortunately recently accident structure resort allow skier dangerous path reach high speed endanger customer here path call dangerous consist tracksarthur want secure customer closing spot way dangerous path resort when spot close track enter leave spot unusable Formally closing spot path consist tracksArthur do not want close spot he happy find way close frac47n spot remain safe help find suitable way