ABC179 - Atcoder/Python精進のための解説メモ

s = input()
if s[-1] == 's':
    s += 'es'
else:
    s += 's'
print(s)

n = int(input())
cnt = 0
ans = 'No'
for _ in range(n):
    d1, d2 = map(int, input().split())
    if d1 == d2:
        cnt += 1
        if cnt >= 3:
            ans = 'Yes'
    else:
        cnt = 0
print(ans)

n = int(input())
ans = 0
for a in range(1, n):
    ans += (n - 1) // a
print(ans)

n, k = map(int, input().split())
lr = [list(map(int, input().split())) for _ in range(k)]
mod = 998244353
dp = [0] * n
dp[0] = 1
acc = 0
for i in range(1, n):
    for li, ri in lr:
        if i - li >= 0:
            acc += dp[i - li]
            acc %= mod
        if i - ri - 1 >= 0:
            acc -= dp[i - ri - 1]
            acc %= mod
    dp[i] = acc
print(dp[-1])