結果
| 問題 | No.3505 Sum of Prod of Root |
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2026-04-18 11:29:22 |
| 言語 | PyPy3 (7.3.17) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 1,729 bytes |
| 記録 | |
| コンパイル時間 | 335 ms |
| コンパイル使用メモリ | 85,376 KB |
| 実行使用メモリ | 82,688 KB |
| 最終ジャッジ日時 | 2026-04-18 11:29:45 |
| 合計ジャッジ時間 | 3,911 ms |
|
ジャッジサーバーID (参考情報) |
judge2_0 / judge3_0 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 1 |
| other | AC * 6 WA * 7 |
ソースコード
# snippet: templete_
# Last Modified: 2026-02-13
from collections import deque, defaultdict
from itertools import permutations, product
from bisect import bisect_left, bisect_right
from heapq import heappush, heappop
from random import randint, shuffle
from time import perf_counter as pc
def II(): return int(input())
def LI(): return list(map(int,input().split()))
def LI_1(): return [int(x) - 1 for x in input().split()]
def SI(): return input()
def LS(): return list(input().split())
mod = 998244353
inf = 1001001001001001001
import sys
sys.setrecursionlimit(10 ** 6)
input = lambda: sys.stdin.readline().rstrip()
_buf = []
def print(*a, **k): _buf.append(" ".join(map(str, a)))
# snippet: isqrt_
# Last Modified: 2026-02-12
from math import sqrt
def isqrt(x):
y = int(sqrt(x))
while (y + 1) * (y + 1) <= x:
y += 1
while y * y > x:
y -= 1
return y
def solve():
N = min(mod - 1, II())
res = [1] * 30
cnt = 1
d = defaultdict(list)
d[1] = []
d[N + 1] = []
for i in range(2, isqrt(N) + 1):
x = i * i
for j in range(2, 30):
d[x].append((i, j))
x *= i
if x > N:
break
ans = 0
key = sorted(d.keys())
# print(key)
for i in range(len(key) - 1):
l = key[i + 1] - key[i]
ans = (ans + cnt * ((key[i + 1] - key[i]) * (key[i + 1] + key[i] - 1) // 2 % mod)) % mod
for x, j in d[key[i + 1]]:
res[j] = x
cnt = 1
for j in range(30):
cnt *= res[j]
cnt %= mod
print(ans)
return
if __name__ == "__main__":
T = 1
# T = II()
for _ in range(T):
solve()
sys.stdout.write("\n".join(_buf) + "\n")