text: #include <iostream>
  #include <string>
  #include <parallel_hashmap/phmap.h>
  
  using phmap::parallel_flat_hash_map;
  
  parallel_flat_hash_map<int64_t, int64_t> hash_map;
  
  phmap::parallel_flat_hash_map<int64_t,int64_t>::iterator it;
  
  void phmap_put(int64_t key, int64_t value){
      hash_map[key]= value;
  }
  int64_t phmap_get_value(int64_t key){
      auto pair= hash_map.find(key);
      if(pair !=hash_map.end()){
          return pair->second;
      }
      return -1;
  }
  
  void phmap_clear(){
      hash_map.clear();
  }