範例2:

6(n) 10(D)
int price[] = {30,20,45,38,10,20};

int win = 0;
int own = price[0];
int sell = 0; 
for(int i=1;i<n;i++){
    if(price[i]-own>=D){ 
        sell = price[i];
        win += sell - own;
        own = Integer.MAX_VALUE; // 脫手賣掉=不持有
    }
    if(sell!=0){
        if(sell-price[i]>=D){
            own = price[i]; // 買進持有(Buy & Hold)
            sell = 0;
        }
    }
}
System.out.println(win);