也当学过了python先

# -*- coding: GBK -*-
exchange_data = [
#索引位的数可移动1根而变为其他数，2代表不能做到，0，1，-1代表添加1根或者减少1根或者自身移动
#0==>
#0,9,6,8
[2,2,2,2,2,2,0,2,1,0],
#1==>
#1,7
[2,2,2,2,2,2,2,1,2,2],
#2==>
#2,3
[2,2,2,0,2,2,2,2,2,2],
#3==>
#2,3,9,5
[2,2,0,2,2,0,2,2,2,1],
#4==>
#4
[2,2,2,2,2,2,2,2,2,2],
#5==>
#3,5,6,9
[2,2,2,0,2,2,1,2,2,1],
#6==>
#0,5,6,8,9
[2,2,2,2,2,-1,2,2,1,0],
#7==>
#1,7
[2,-1,2,2,2,2,2,0,2,2],
#8==>
#0,6,8,9
[-1,2,2,2,2,2,-1,2,2,-1],
#9==>
#0,3,5,6,8,9
[0,2,2,-1,2,-1,0,2,1,2]
]
has_result = False
def func(num1, op, num2, num3):
    tmp1 = exchange_data[num1]
    tmp2 = exchange_data[num2]
    tmp3 = exchange_data[num3]
    for i in range(0, 10):
        if(tmp1[i]>=2 and i!=num1):continue;
        for j in range(0, 10):
            if(tmp2[j]>=2 and j!=num2):continue;
            for k in range(0, 10):
                if(tmp3[k]>=2 and k!=num3):continue;
                if(op=='+' and i+j==k and is_result(tmp1[i], tmp2[j], tmp3[k])):
                   print i, op, j, '=', k
                if(op=='+' and i-j==k and is_result(tmp1[i], tmp2[j], tmp3[k], -1)):
                   print i, '-', j, '=', k
                if(op=='-' and i-j==k and is_result(tmp1[i], tmp2[j], tmp3[k])):
                   print i, op, j, '=', k
                if(op=='-' and i+j==k and is_result(tmp1[i], tmp2[j], tmp3[k], 1)):
                   print i, '+', j, '=', k
def is_result(*result):
    global has_result
    moveNum = 0
    total = 0
    for i in result:
        if(i<2):
            moveNum+=1
            total+=i
        if(i==0):
            moveNum+=1
    if(total!=0 or moveNum!=2):
        return False
    has_result = True
    return True

def parse0(arg):
    #print arg[0], arg[1], arg[2], arg[4]
    global has_result
    has_result = False
    func(int(arg[0]), arg[1],int(arg[2]),int(arg[4]))
    if has_result==False:
      print -1;
if(__name__=="__main__"):
    import sys
    parse0(sys.argv[1])

D:\Runtime\python27>python problem1.py 9+5=9
3 + 5 = 8
3 + 6 = 9

D:\Runtime\python27>python problem1.py 9+4=9
-1

D:\Runtime\python27>python problem1.py 9+0=9
-1

D:\Runtime\python27>python problem1.py 9+1=9
9 - 1 = 8