HDOJ 1008

HDOJ 1008

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