Elevator HDU

#include<stdio.h>int main(){int n;while(scanf("%d",&n)&&n!=0){int i=0,time=0,from=0,go=0;for(i=0;i<n;i++){scanf("%d",&go);if(go>from){time+=(go-from)*6+5;}elsetime+=(from-go)*4+5;from=go;}printf("%d\n",time);}return 0;}