QOJ.ac

QOJ

ID题目提交者结果用时内存语言文件大小提交时间测评时间
#21640#2842. 好图计数hy_zheng_zai_nei_juan#WA 187ms3840kbC++20975b2022-03-07 17:54:252022-05-08 03:46:07

Judging History

你现在查看的是最新测评结果

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2022-05-08 03:46:07]
  • 评测
  • 测评结果:WA
  • 用时:187ms
  • 内存:3840kb
  • [2022-03-07 17:54:25]
  • 提交

answer

#include <bits/stdc++.h>

const int N = 23334;
int n, T, mod, f[N], g[N], sum[N];

int fastpow(int x, int p) {
	int r = 1;
	while (p) {
		if (p & 1) r = 1ll * r * x % mod;
		x = 1ll * x * x % mod;
		p >>= 1;
	}
	return r;
}

void solve() {
	int inv2 = (mod + 1) >> 1;
	for (int n = 1; n < N; ++n) {
		if (n == 1) {
			f[n] = g[n] = 1;
		}
		else {
			__int128 total = 0;
			for (int i = 1; i < n; ++i)
				total += 1ll * f[i] * sum[n - i];
			f[n] = 2ll * (f[n] + total % mod) * fastpow(n, mod - 2) % mod;
			g[n] = 1ll * inv2 * f[n];
		}
		for (int i = n; i < N; i += n) {
			sum[i] = (sum[i] + 1ll * n * g[n]) % mod;
			if (i > n) {
				f[i] = (f[i] + 1ll * n * g[n]) % mod;
			}
		}
	}
}

int main() {
	std::ios::sync_with_stdio(false);
	std::cin.tie(nullptr);
	std::cout.tie(nullptr);
	std::cin >> T >> mod;
	solve();
	for (int i = 1; i <= T; ++i) {
		int n;
		std::cin >> n;
		std::cout << f[n] << '\n';
	}
	return 0;
}

詳細信息

Test #1:

score: 0
Wrong Answer
time: 187ms
memory: 3840kb

input:

232 1050896131
15469
609
20
15343
18812
23
22505
19565
15762
9798
20897
20183
15
20680
3775
14113
1515
5
315
21711
7173
15222
11404
4
213
908
15283
3543
6196
369
18445
757
16449
478
1
40
42
21363
11
274
114
8679
8947
32
5465
26
894
5548
6026
22489
28
9
16568
7978
18
17
12354
25
27
12536
396
14838
88...

output:

-175632735
643128338
-177912755
-787557982
-557085983
-918995194
5676000
-101399308
-801164704
-1002815386
-550391130
-646008796
480355066
-923000816
908888178
-874014173
-826397689
63966815
92748259
-984546823
688450612
548655850
-749888863
10
661789606
329036561
1049954615
-859901317
248273329
-47...

result:

wrong answer 1st lines differ - expected: '904884594', found: '-175632735'