package main

import (
	"bufio"
	"fmt"
	"io"
	"os"
	"strconv"
)

func main() {
	sc := NewScanner(os.Stdin)
	a, b, c := sc.ScanInt(), sc.ScanInt(), sc.ScanInt()

	if a+b*2 >= c {
		fmt.Println("Yes")
		return
	}
	fmt.Println("No")
}

type Scanner struct {
	sc *bufio.Scanner
}

func NewScanner(r io.Reader) *Scanner {
	s := &Scanner{bufio.NewScanner(r)}
	s.sc.Split(bufio.ScanWords)
	return s
}

func (s *Scanner) ScanInt() int {
	s.sc.Scan()
	i, e := strconv.Atoi(s.sc.Text())
	if e != nil {
		panic(e)
	}
	return i
}
