1.0 KB | 1065 chars
"""
[4903: Relax! It’s just a game](https://www.acmicpc.net/problem/4903)
Tier: Bronze 1
Category: combinatorics, math
"""
import sys
from math import sqrt, pi, sin, factorial, ceil, floor
from datetime import datetime, timedelta
SYS_INPUT = True
RECURSION_LIMIT = 10 ** 7
SET_RECURSION = False
BLANK = " "
if SET_RECURSION:
sys.setrecursionlimit(RECURSION_LIMIT)
inp = lambda : sys.stdin.readline().rstrip() if SYS_INPUT else input()
mii = lambda : [*map(int,inp().split())]
mfi = lambda : [*map(float,inp().split())]
ii = lambda : int(inp())
fi = lambda : float(inp())
isplit = lambda : inp().split()
p = print
def gcd(a, b): return gcd(b, a % b) if b > 0 else a
def lcm(a, b): return a * b // gcd(a, b)
def solve():
while 1:
a, b = mii()
if a == b == -1:
break
possibilities = factorial(a + b) // (factorial(a) * factorial(b))
if a + b == possibilities:
print(f"{a}+{b}={a + b}")
else:
print(f"{a}+{b}!={a + b}")
if __name__ == "__main__":
tc = 1
for t in range(1, tc+1):
ret = solve()