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
#108072#5749. Directed Vertex CactizhaohaikunAC ✓23ms7280kbC++141019b2023-05-23 15:39:432023-05-23 15:39:50

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.
  • [2023-05-23 15:39:50]
  • 评测
  • 测评结果:AC
  • 用时:23ms
  • 内存:7280kb
  • [2023-05-23 15:39:43]
  • 提交

answer

#include <bits/stdc++.h>
#define SZ(x) (int) x.size() - 1
#define all(x) x.begin(), x.end()
#define ms(x, y) memset(x, y, sizeof x)
#define F(i, x, y) for (int i = (x); i <= (y); i++)
#define DF(i, x, y) for (int i = (x); i >= (y); i--)
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
template <typename T> void chkmax(T& x, T y) { x = max(x, y); }
template <typename T> void chkmin(T& x, T y) { x = min(x, y); }
template <typename T> void read(T &x) {
	x = 0; int f = 1; char c = getchar();
	for (; !isdigit(c); c = getchar()) if (c == '-') f = -f;
	for (; isdigit(c); c = getchar()) x = x * 10 + c - '0';
	x *= f;
}
const int MOD = 1e9 + 9;
int n, m, ans = 1, inv[1000010];
signed main() {
	cin >> n >> m;
	int t = (ll) n * (n - 1) / 2 % MOD;
	inv[1] = 1;
	F(i, 1, n) ans = (ll) ans * i % MOD;
	F(i, 2, m) inv[i] = (ll) (MOD - MOD / i) * inv[MOD % i] % MOD;
	F(i, 1, m) ans = (ll) ans * t % MOD * inv[i] % MOD, t = (t - 1 + MOD) % MOD;
	cout << ans;
	return 0;
}

详细

Test #1:

score: 100
Accepted
time: 2ms
memory: 3200kb

input:

3 1

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 1ms
memory: 3404kb

input:

4 4

output:

360

result:

ok 1 number(s): "360"

Test #3:

score: 0
Accepted
time: 8ms
memory: 5516kb

input:

39847 348708

output:

983575456

result:

ok 1 number(s): "983575456"

Test #4:

score: 0
Accepted
time: 2ms
memory: 3248kb

input:

1 1

output:

0

result:

ok 1 number(s): "0"

Test #5:

score: 0
Accepted
time: 2ms
memory: 3380kb

input:

3 2

output:

18

result:

ok 1 number(s): "18"

Test #6:

score: 0
Accepted
time: 0ms
memory: 3268kb

input:

3 3

output:

6

result:

ok 1 number(s): "6"

Test #7:

score: 0
Accepted
time: 2ms
memory: 3348kb

input:

3 4

output:

0

result:

ok 1 number(s): "0"

Test #8:

score: 0
Accepted
time: 21ms
memory: 7120kb

input:

3 1000000

output:

0

result:

ok 1 number(s): "0"

Test #9:

score: 0
Accepted
time: 1ms
memory: 3200kb

input:

4 1

output:

144

result:

ok 1 number(s): "144"

Test #10:

score: 0
Accepted
time: 1ms
memory: 3264kb

input:

4 2

output:

360

result:

ok 1 number(s): "360"

Test #11:

score: 0
Accepted
time: 1ms
memory: 3420kb

input:

4 3

output:

480

result:

ok 1 number(s): "480"

Test #12:

score: 0
Accepted
time: 2ms
memory: 3204kb

input:

4 5

output:

144

result:

ok 1 number(s): "144"

Test #13:

score: 0
Accepted
time: 2ms
memory: 3264kb

input:

4 6

output:

24

result:

ok 1 number(s): "24"

Test #14:

score: 0
Accepted
time: 2ms
memory: 3208kb

input:

5 1

output:

1200

result:

ok 1 number(s): "1200"

Test #15:

score: 0
Accepted
time: 2ms
memory: 3244kb

input:

5 2

output:

5400

result:

ok 1 number(s): "5400"

Test #16:

score: 0
Accepted
time: 1ms
memory: 3268kb

input:

5 3

output:

14400

result:

ok 1 number(s): "14400"

Test #17:

score: 0
Accepted
time: 1ms
memory: 3268kb

input:

5 4

output:

25200

result:

ok 1 number(s): "25200"

Test #18:

score: 0
Accepted
time: 2ms
memory: 3212kb

input:

5 5

output:

30240

result:

ok 1 number(s): "30240"

Test #19:

score: 0
Accepted
time: 2ms
memory: 3236kb

input:

5 6

output:

25200

result:

ok 1 number(s): "25200"

Test #20:

score: 0
Accepted
time: 1ms
memory: 3264kb

input:

5 7

output:

14400

result:

ok 1 number(s): "14400"

Test #21:

score: 0
Accepted
time: 0ms
memory: 3268kb

input:

5 8

output:

5400

result:

ok 1 number(s): "5400"

Test #22:

score: 0
Accepted
time: 2ms
memory: 3196kb

input:

5 9

output:

1200

result:

ok 1 number(s): "1200"

Test #23:

score: 0
Accepted
time: 1ms
memory: 3236kb

input:

5 10

output:

120

result:

ok 1 number(s): "120"

Test #24:

score: 0
Accepted
time: 2ms
memory: 3200kb

input:

1000 1

output:

533396879

result:

ok 1 number(s): "533396879"

Test #25:

score: 0
Accepted
time: 2ms
memory: 3204kb

input:

1000 100

output:

199484478

result:

ok 1 number(s): "199484478"

Test #26:

score: 0
Accepted
time: 2ms
memory: 3296kb

input:

1000 10000

output:

656650652

result:

ok 1 number(s): "656650652"

Test #27:

score: 0
Accepted
time: 19ms
memory: 7104kb

input:

1000 1000000

output:

0

result:

ok 1 number(s): "0"

Test #28:

score: 0
Accepted
time: 15ms
memory: 6824kb

input:

535164 619302

output:

721871396

result:

ok 1 number(s): "721871396"

Test #29:

score: 0
Accepted
time: 23ms
memory: 7164kb

input:

1000000 1000000

output:

580712335

result:

ok 1 number(s): "580712335"

Test #30:

score: 0
Accepted
time: 7ms
memory: 5408kb

input:

1000000 234534

output:

546630669

result:

ok 1 number(s): "546630669"

Test #31:

score: 0
Accepted
time: 16ms
memory: 7280kb

input:

234523 1000000

output:

127869098

result:

ok 1 number(s): "127869098"

Test #32:

score: 0
Accepted
time: 2ms
memory: 3300kb

input:

44722 10000

output:

0

result:

ok 1 number(s): "0"