#yuki_527

n=int(raw_input())
v=[]
w=[]
for i in xrange(n):
 v1,w1=map(int,raw_input().split())
 v.append(v1)
 w.append(w1)
V=int(raw_input())
dp=[[0 for i in xrange(101010)] for j in xrange(n+1)]
for i in xrange(n):
 for j in xrange(100002):
  dp[i+1][j]=max(dp[i+1][j],dp[i][j])
  dp[i+1][j+w[i]]=max(dp[i+1][j+w[i]],dp[i][j]+v[i])
mn=float('inf')
mx=-1
for i in xrange(1,100002):
 if dp[n][i]==V:
  mn=min(mn,i)
  mx=max(mx,i)
print mn
if mx==100001:
 print 'inf'
else:
 print mx