import times, strutils, sequtils, math, algorithm, tables, sets, lists, intsets
import critbits, future, strformat, deques
template `max=`(x,y) = x = max(x,y)
template `min=`(x,y) = x = min(x,y)
template `mod=`(x,y) = x = x mod y
template scan2 = (scan(), scan())
template scan3 = (scan(), scan())
let read* = iterator: string {.closure.} =
    while true: (for s in stdin.readLine.split: yield s)
proc scan(): int = read().parseInt
proc scanf(): float = read().parseFloat
proc toInt(c:char): int =
    return int(c) - int('0')




proc solve()=
  var
    n = scan()
    vw = newseqwith(n,(scan(),scan()))
    v = scan()
    m = 100000
    dp = newseqwith(2,newseqwith(m+1,0))
  for i in 1..n:
    var
      now = i.mod(2)
      prev = (i+1).mod(2)
    for w in 0..100000:
      if w-vw[i-1][1]>=0:
        dp[now][w].max=max(dp[prev][w],dp[prev][w-vw[i-1][1]]+vw[i-1][0])
      else:
        dp[now][w].max=dp[prev][w]
  var
    minw = int.high
    maxw = 0
  for w in 1..m:
    if dp[n.mod(2)][w] == v:
      minw.min=w
      maxw.max=w
  echo minw
  if maxw==m:
    echo "inf"
  else:
    echo maxw




  
  
solve()