H-Index

class Solution {
public:
    int hIndex(vector<int>& citations) {
        int size=citations.size();
        int index=size;
        bool flag=false;
        while(index>0)
        {
            int count=0;
            for(int i=0;i<size;i++)
            {
                if(citations[i]>=index)
                    count++;
            }
            
            if(index<=count)
                break;            
            index--;
        }
        return index;
        
    }
};