# cook your dish here

entry = input().split()

a,b,c = [int(i) for i in entry]

if (a+b >c) and (abs(a-b)<c):
    print("YES")
    
elif (a+c > b) and (abs(a-c)<b):
    print("YES")
    
elif (c+b > a) and (abs(c-b)< a):
    print("YES")
else:
    print("NO")


8a88bb504c7daaa187bc1d51f711dccead06315c
<mask token>

<mask token>
if a + b > c and abs(a - b) < c:
    print('YES')
elif a + c > b and abs(a - c) < b:
    print('YES')
elif c + b > a and abs(c - b) < a:
    print('YES')
else:
    print('NO')

entry = input().split()
a, b, c = [int(i) for i in entry]
if a + b > c and abs(a - b) < c:
    print('YES')
elif a + c > b and abs(a - c) < b:
    print('YES')
elif c + b > a and abs(c - b) < a:
    print('YES')
else:
    print('NO')

# cook your dish here

entry = input().split()

a,b,c = [int(i) for i in entry]

if (a+b >c) and (abs(a-b)<c):
    print("YES")
    
elif (a+c > b) and (abs(a-c)<b):
    print("YES")
    
elif (c+b > a) and (abs(c-b)< a):
    print("YES")
else:
    print("NO")

