hdoj1008

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