共一行,4个整数L1,L2,L3,D。相邻两个数之间用一个空格分隔。(0 <= L1 <= 10,0 <= L2 <= 10,0 <= L3 <= 10,0 <= D <= 30)
共一行,包含一个整数,即神秘数。
1 1 1 2
8