lopov

input/code.cpp:11:1: error: 'multisetset' does not name a type
 multisetset<long long> bags;
 ^
input/code.cpp: In function 'int tr(int)':
input/code.cpp:17:6: error: 'bags' was not declared in this scope
   it=bags.lower_bound(m);
      ^
input/code.cpp: In function 'int main()':
input/code.cpp:33:5: error: 'bags' was not declared in this scope
     bags.insert(C);
     ^
input/code.cpp:36:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i=0; i<jw.size(); ++i){
                           ^

#include <iostream>
#include <vector>
#include <algorithm>
#include <set>
#define MP make_pair
#define F first
#define S second
int N, K;
using namespace std;

multisetset<long long> bags;
set<long long>::iterator it;
vector<pair<int, int> > jw;


int tr(int m){
  it=bags.lower_bound(m);
  if (it==bags.end()) return 0;
  bags.erase(it);
  return 1;
}

int main(){
  cin >> N >> K;
  for (int i=0; i<N; ++i){
    int M, V;
    cin >> M >> V;
    jw.push_back(MP(-V, M));
  } sort(jw.begin(), jw.end());
  for (int i=0; i<K; ++i){
    long long C;
    cin >> C;
    bags.insert(C);
  }
  long long ans=0;
  for (int i=0; i<jw.size(); ++i){
    ans-=tr(jw[i].S)*jw[i].F;
  }
  cout << ans << "\n";
}