class Solution {
    public int minPartitions(String n) {
        int max=0;
        
        for(char num:n.toCharArray())
            max=Math.max(max, num-'0');
        
        return max;
    }
}

class Solution {
    public int minPartitions(String n) {
        for(int i=9; i>=0; i--){
            if(n.contains(""+i))
                return i;
        }
        return -1;
    }
}