浙大PAT甲级-1008

小学生算术题

#include <iostream>using namespace std;int main(){    int n, i, time=0;    int a=0, b;    cin>>n;    i=n;    while(i--){        cin>>b;        if(b>a){            time+=(b-a)*6;        }else if(b<a){            time+=(a-b)*4;        }        a=b;    }    time+=n*5;    cout<<time<<endl;    return 0;}