<reponame>nicklambourne/hackerrank-solutions
#!/bin/python3

import sys

def kangaroo(x1, v1, x2, v2):
    if (x1 < x2 and v1 <= v2) or (x2 < x1 and v2 <= v1):
        return "NO"
    if ((x2 - x1) % (v2-v1)) == 0:
        return "YES"
    return "NO"

x1, v1, x2, v2 = input().strip().split(' ')
x1, v1, x2, v2 = [int(x1), int(v1), int(x2), int(v2)]
result = kangaroo(x1, v1, x2, v2)
print(result)

#!/bin/python3

import sys

def kangaroo(x1, v1, x2, v2):
    if (x1 < x2 and v1 <= v2) or (x2 < x1 and v2 <= v1):
        return "NO"
    if ((x2 - x1) % (v2-v1)) == 0:
        return "YES"
    return "NO"

x1, v1, x2, v2 = input().strip().split(' ')
x1, v1, x2, v2 = [int(x1), int(v1), int(x2), int(v2)]
result = kangaroo(x1, v1, x2, v2)
print(result)
#!/bin/python3