#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pll pair<ll,ll>
#define pii pair<int,int>
#define fs first
#define sc second
#define tlll tuple<ll,ll,ll>
#define _all(T) T.begin(),T.end()
const int mxn = 6e5+10;
int N,Q;
vector<int> all;
int rp[mxn];
pii range[mxn];
int arr[mxn];
bitset<mxn> flop;
namespace C1{
vector<pii> bit[mxn];
void add(int p,pii v){
for(;p<mxn;p+=p&-p){
bit[p].push_back(v);
}
return;
}
void getval(int p,int id){
for(int i = p;i>0;i-= i&-i){
while(!bit[i].empty()&&bit[i].back().fs>=p){
int now = bit[i].back().sc;bit[i].pop_back();
rp[now] = max(rp[now],id);
}
}
return;
}
void GO(){
for(int i = 1;i<=N;i++){
if(range[i].fs == range[i].sc)continue;
add(range[i].fs,pii(range[i].sc-1,i));
}
for(int i = 1;i<mxn;i++)sort(bit[i].begin(),bit[i].end());
for(int i = Q;i>=1;i--){
getval(arr[i],i);
}
//for(int i = 1;i<=N;i++)cout<<rp[i]<<' ';cout<<endl;
return;
}
}
namespace C2{
ll ans = 0;
int bit[mxn];
void modify(int p,int v){
for(;p<mxn;p+=p&-p)bit[p] += v;
return;
}
int getval(int s,int e){
int re = 0;
for(;e>0;e-= e&-e)re += bit[e];
s--;
for(;s>0;s-= s&-s)re -= bit[s];
return re;
}
vector<int> op[mxn];
void GO(){
ans = 0;
for(int i = 1;i<=N;i++){
op[rp[i]].push_back(i);
}
for(int i = Q;i>=1;i--){
modify(arr[i],1);
for(auto &j:op[i]){
int cnt = getval(range[j].sc,mxn-1);
if(cnt&1)ans += all[range[j].fs];
else ans += all[range[j].sc];
}
}
for(auto &j:op[0]){
int cnt = getval(range[j].sc,mxn-1);
if(flop[j])swap(range[j].fs,range[j].sc);
if(cnt&1)ans += all[range[j].sc];
else ans += all[range[j].fs];
}
cout<<ans<<'\n';
return;
}
}
int main(){
ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
cin>>N>>Q;
all.push_back(-1);
for(int i = 1;i<=N;i++){
cin>>range[i].fs>>range[i].sc;
if(range[i].fs>range[i].sc){
flop[i] = true;
swap(range[i].fs,range[i].sc);
}
all.push_back(range[i].fs);
all.push_back(range[i].sc);
}
for(int i = 1;i<=Q;i++){
cin>>arr[i];
all.push_back(arr[i]);
}
sort(all.begin(),all.end());all.resize(unique(all.begin(),all.end())-all.begin());
for(int i = 1;i<=N;i++){
range[i].fs = lower_bound(_all(all),range[i].fs)-all.begin();
range[i].sc = lower_bound(_all(all),range[i].sc)-all.begin();
}
for(int i = 1;i<=Q;i++)arr[i] = lower_bound(_all(all),arr[i])-all.begin();
C1::GO();
C2::GO();
}
