# 474. Ones and Zeroes | LeetCode Solution

## 474. Ones and Zeroes | LeetCode Solution

You are given an array of binary strings strs and two integers m and n.

Return the size of the largest subset of strs such that there are at most m 0's and n 1's in the subset.

A set x is a subset of a set y if all elements of x are also elements of y.

Example 1:

Input: strs = ["10","0001","111001","1","0"], m = 5, n = 3
Output: 4
Explanation: The largest subset with at most 5 0's and 3 1's is {"10", "0001", "1", "0"}, so the answer is 4.
Other valid but smaller subsets include {"0001", "1"} and {"10", "1", "0"}.
{"111001"} is an invalid subset because it contains 4 1's, greater than the maximum of 3.

Example 2:

Input: strs = ["10","0","1"], m = 1, n = 1
Output: 2
Explanation: The largest subset is {"0", "1"}, so the answer is 2.

Constraints:

• 1 <= strs.length <= 600
• 1 <= strs[i].length <= 100
• strs[i] consists only of digits '0' and '1'.
• 1 <= m, n <= 100

class Solution {
public:
int dp[101][101];

int findMaxForm(vector<string>& strs, int m, int n) {

for(string s:strs){
int one=count(s.begin(),s.end(),'1');
int zero=count(s.begin(),s.end(),'0');
for(int o=n; o>=one; o--){
for(int z=m; z>=zero; z--){
dp[z][o]=max(dp[z-zero][o-one]+1,dp[z][o]);
}
}
}

return dp[m][n];

}
};