题目：

题解：

class Solution:
    def findMaxForm(self, strs: List[str], m: int, n: int) -> int:
        count10 = []
        for s in strs:
            count10.append([0,0])
            for c in s:
                if c == '0': count10[-1][0]+=1
                else: count10[-1][1]+=1
        dp = [[0]*(n+1) for _ in range(m+1)]
        for i in range(len(count10)):
            x,y = count10[i]
            for i in range(m,x-1,-1):# 滚动数组，从后往前
                for j in range(n,y-1,-1):
                    dp[i][j] = max(dp[i-x][j-y]+1,dp[i][j])
        return dp[m][n]