from collections import defaultdict import sys readline=sys.stdin.readline class Cumsum: def __init__(self,lst,mod=0): self.N=len(lst) self.mod=mod self.cumsum=[0]*(self.N+1) self.cumsum[0]=0 for i in range(1,self.N+1): self.cumsum[i]=self.cumsum[i-1]+lst[i-1] if self.mod: self.cumsum[i]%=self.mod def __getitem__(self,i): if type(i)==int: if 0<=i<self.N: a,b=i,i+1 elif -self.N<=i<0: a,b=i+self.N,i+self.N+1 else: raise IndexError('list index out of range') else: a,b=i.start,i.stop if a==None or a<-self.N: a=0 elif self.N<=a: a=self.N elif a<0: a+=self.N if b==None or self.N<=b: b=self.N elif b<-self.N: b=0 elif b<0: b+=self.N s=self.cumsum[b]-self.cumsum[a] if self.mod: s%=self.mod return s def __setitem__(self,i,x): if -self.N<=i<0: i+=self.N elif not 0<=i<self.N: raise IndexError('list index out of range') self.cumsum[i+1]=self.cumsum[i]+x if self.mod: self.cumsum[i+1]%=self.mod def __str__(self): lst=[self.cumsum[i+1]-self.cumsum[i] for i in range(self.N)] if self.mod: for i in range(self.N): lst[i]%=self.mod return "["+", ".join(map(str,lst))+"]" N,M,X=map(int,readline().split()) dct=defaultdict(list) for i in range(N): A,B=map(int,readline().split()) dct[B].append(A) lst=[] for B in dct.keys(): dct[B].sort() dct[B][-1]+=X lst+=dct[B] K=int(readline()) lst.sort(reverse=True) lst=Cumsum(lst) ans=0 for c in map(int,readline().split()): ans+=lst[:c] print(ans)