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2 changed files with 54 additions and 0 deletions

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import io
import sys
sys.stdin = io.StringIO('''5
5 3 2 8
100 101 102 105
3 2 1 100000000
10 20 15 14
101 101 101 3''')
def fun(a, b, c, n):
total = a + b + c + n
if total % 3 != 0:
return False
avg = total // 3
if avg - a < 0 or avg - b < 0 or avg - c < 0:
return False
return True
t = int(input())
for _ in range(t):
print('YES' if fun(*map(int, input().split())) else 'NO')
if __name__ == '__main__':
pass

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import io
import sys
sys.stdin = io.StringIO('''4
100 98
42 32
1000000000000000000 1
41 40''')
# 数论基础 唯一分解定理(算术基本定理)
# x - n*p = y
# 则 n*p = x - y = z
# 大于1的整数就满足 可分解为任意素数乘积
def fun(x, y):
z = x - y
return z > 1
t = int(input())
for _ in range(t):
print('YES' if fun(*map(int, input().split())) else 'NO')
if __name__ == '__main__':
pass