题解 | 跳台阶
跳台阶
https://www.nowcoder.com/practice/bd830bee701249049eaf7cc34ac17265
mod = 998244353
def solve(testcase):
n = II()
a, b = 1, 1
for _ in range(2, n):
a, b = b, (a + b) % mod
print(b)
for testcase in range(1):
solve(testcase)
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