输入任意四个整数(0到10)，运算符只有加减乘除，还有括号.每个数只能且必须用一次。要求判断这些表达的结果中是否有24。如果有，输出计算表达式：如输入4，6，1，1 输出 4*6*1*1 =24 （允许有括号）。 -Enter any four integers (0-10), the operator only addition, subtraction, multiplication, and division, as well as brackets each number can only and must be used once. Required to determine whether the results of these expression 24. If there is, the output calculation expressions: If input 4,6,1,1 output 4* 6* 1* 1 = 24 (allowing parentheses).