HDU1008 Elevator

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原题传送

#include <stdio.h>
int main(void) {
    int T, location, floor, second;
    while(scanf("%d", &T), T) {
        location = 0;
        second = 5 * T;
        while(T--) {
            scanf("%d", &floor);
            second += location < floor ? (floor - location) * 6 : (location - floor) * 4;
            location = floor;
        }
        printf("%d\n", second);
    }
    return 0;
}