special-array-with-x-elements-greater-than-or-equal-x

int specialArray(vector<int>& nums) {
     int c=0;
     for(int i=1;i<1001;i++){
         c=0;
         for(int j=0;j<nums.size();j++){
             if(nums[j]>=i)
             c++;
         }
         if(c==i)
         return i;
         
         
     }
     return -1;
    }
     //main function
int main(){
   int n,x;
   cout<<"enter the number of elements";
   cin>>n;
   for(int i=0;i<n;i++){
cin>>x;
v.push_back(x);
}
    //call the function
  cout<<specialArray(v);
   return 0;
}