bayunzibba @ 2024-12-04 20:26:08
l = [[[0 for k in range(22)] for j in range(22)] for i in range(22)]
def w(a,b,c):
if a <= 0 or b <= 0 or c <= 0:
return 1
if a > 20 or b > 20 or c > 20:
return w(20,20,20)
if l[a][b][c] != 0:
return l[a][b][c]
if a < b and b < c:
l[a][b][c] = w(a,b,c-1) + w(a,b-1,c-1) - w(a,b-1,c)
else:
l[a][b][c] = w(a-1,b,c) + w(a-1,b-1,c) + w(a-1,b,c-1) - w(a-1,b-1,c-1)
return l[a][b][c]
num = []
while True:
a,b,c = map(int,input().split())
if a == -1 and b == -1 and c == -1:
break
else:
num.append((a,b,c))
for i in num:
print(f'w({i[0]},{i[1]},{i[2]}) = {w(i[0],i[1],i[2])}')