题目：

代码：

num1=[97,92,0,0,89,82,0,0,0,95,0,0,94,0,0,0,98,93,0,0]
num2=[90,85,0,0,83,86,0,97,0,99,0,0,91,83,0,0,83,87,0,99]
num3=[0,96,0,0,97,0,0,96,89,0,96,0,0,87,98,0,99,92,0,96]
num4=[0,0,0,80,0,0,87,0,0,0,97,93,0,0,97,93,98,96,89,95]
num5=[0,0,93,86,0,0,90,0,0,0,0,98,0,0,98,86,81,98,92,81]
res=[]
for a in range(20):
    ans=0
    ans+=num1[a]
    for b in range(a+1,20):
        ans+=num2[b]
        for c in range(b+1,20):
            ans+=num3[c]
            for d in range(c+1,20):
                ans+=num4[d]
                for e in range(d+1,20):
                    ans+=num5[e]
                    res.append(ans)
                    ans-=num5[e]
                ans-=num4[d]
            ans-=num3[c]
        ans-=num2[b]
print(max(res))

结果：490