0-9中随即抽选4个数,组成4位数,(这十个数字可以重复也可以不重复,我们这次仅仅讨论他们不重复的情况,也就是8854,4154这样的数值是不行的.1234,5678这样的数值是合法的.)



然后你猜这个数值,计算机给出你猜的结果,用xAyB表示,A表示你猜对,并且这个数值的位置也正确的有X个,B表示你猜对,但是位置的错误的数值有Y个. -0-9 in the number 4 was selected to form the 4-digit, (which can repeat the number 10 may or may not be repeated, this time we only discuss the case of non-repetition, that is, 8854,4154 such value is not .1234,5678 of such a value is legal.) and then you guess the value of computer do you think the results are given with xAyB that, A said that you guess right, and also the location of the correct value of X months, B that you guess right, but the location of the numerical errors are Y months.