Hey susmithamenda,

The reason why it doesn’t work is because in:

for(int value: count.values()){
        if(value != 0){
            numberNeeded++;
        }
    }

You are not considering if the value > 1. You are just assuming that both strings are unique in characters. For instance, if value is “2” or “-2” - it is still being treated as only if value = 1 (numberNeeded++).

Secondly, another problem with this code is when the second string is iterating through the map. It is possible that you delete a previous entry that you have already done.

for(char c : second.toCharArray()){
        if(count.containsKey(c))
            count.put(c, count.get(c)-1);
        else
            count.put(c, 1);
    }

For example:

First: “d” Second: “ccc”

After adding it to map (first for loop): Map: <”d”, 1>

After the checking map in second for loop:

first iteration: Map: <”d”, 1> <"c", 1>

second iteration: (DELETED A PREVIOUS ENTRY HERE) Map: <”d”, 1> <"c", 0>

third iteration Map: <”d”, 1> <"c", -1>

Hope that helps, Cheers