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#755100#9553. The Hermitucup-team918#AC ✓33ms21084kbC++14965b2024-11-16 16:27:402024-11-18 19:48:33

Judging History

你现在查看的是最新测评结果

  • [2024-11-18 19:48:33]
  • 自动重测本题所有获得100分的提交记录
  • 测评结果：AC
  • 用时：33ms
  • 内存：21084kb
查看
  • [2024-11-18 19:43:48]
  • hack成功，自动添加数据
  • (/hack/1196)
  • [2024-11-16 16:27:41]
  • 评测
  • 测评结果：100
  • 用时：25ms
  • 内存：21068kb
查看
  • [2024-11-16 16:27:40]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;

const int Mod=998244353;
const int N=1e5+5;

long long dp[N][20], jc[N], invjc[N];

long long qsm(int x,int y)
{
	if(!y)
		return 1;

	long long t=qsm(x,y/2);
	if(y%2==0)
		return t*t%Mod;
	return t*t%Mod*x%Mod;
}

long long C(int n,int m)
{
	if(n<0 || m<0 || n<m)
		return 0;

	return jc[n]*invjc[m]%Mod*invjc[n-m]%Mod;
}

int main()
{
	int n,m;
	cin >> n >> m;
	jc[0]=1;
	for(int i=1;i<=n;i++)
		jc[i]=jc[i-1]*i%Mod;

	invjc[n]=qsm(jc[n],Mod-2);
	for(int i=n;i>=1;i--)
		invjc[i-1]=invjc[i]*i%Mod;

	long long sumways=C(n,m)*m%Mod;
	for(int i=1;i<=n;i++)
	{
		dp[i][1]=1;
		for(int j=1;j<20;j++)
			if(dp[i][j])
				for(int k=i*2;k<=n;k+=i)
					(dp[k][j+1] += dp[i][j]) %= Mod;
	}

	long long ans=0;
	for(int i=1;i<=n;i++)
		for(int j=1;j<=min(m,19);j++)
			(ans += dp[i][j]*C(n/i-1,m-j)) %= Mod;
	printf("%lld\n",((sumways-ans+Mod)%Mod+Mod)%Mod);
	return 0;
}
源文件, 语言: C++14

这程序好像有点Bug，我给组数据试试？

详细

Test #1:

score: 100
Accepted
time: 1ms
memory: 5888kb

input:

4 3

output:

7

result:

ok 1 number(s): "7"

Test #2:

score: 0
Accepted
time: 1ms
memory: 5908kb

input:

11 4

output:

1187

result:

ok 1 number(s): "1187"

Test #3:

score: 0
Accepted
time: 22ms
memory: 20984kb

input:

100000 99999

output:

17356471

result:

ok 1 number(s): "17356471"

Test #4:

score: 0
Accepted
time: 3ms
memory: 5756kb

input:

11451 1919

output:

845616153

result:

ok 1 number(s): "845616153"

Test #5:

score: 0
Accepted
time: 22ms
memory: 21032kb

input:

99998 12345

output:

936396560

result:

ok 1 number(s): "936396560"

Test #6:

score: 0
Accepted
time: 20ms
memory: 21048kb

input:

100000 1

output:

0

result:

ok 1 number(s): "0"

Test #7:

score: 0
Accepted
time: 27ms
memory: 20948kb

input:

100000 15

output:

190067060

result:

ok 1 number(s): "190067060"

Test #8:

score: 0
Accepted
time: 1ms
memory: 5884kb

input:

10 3

output:

299

result:

ok 1 number(s): "299"

Test #9:

score: 0
Accepted
time: 1ms
memory: 5892kb

input:

10 4

output:

743

result:

ok 1 number(s): "743"

Test #10:

score: 0
Accepted
time: 0ms
memory: 5840kb

input:

10 5

output:

1129

result:

ok 1 number(s): "1129"

Test #11:

score: 0
Accepted
time: 0ms
memory: 3848kb

input:

15 6

output:

28006

result:

ok 1 number(s): "28006"

Test #12:

score: 0
Accepted
time: 1ms
memory: 5816kb

input:

15 7

output:

42035

result:

ok 1 number(s): "42035"

Test #13:

score: 0
Accepted
time: 1ms
memory: 5872kb

input:

123 45

output:

214851327

result:

ok 1 number(s): "214851327"

Test #14:

score: 0
Accepted
time: 1ms
memory: 5908kb

input:

998 244

output:

964050559

result:

ok 1 number(s): "964050559"

Test #15:

score: 0
Accepted
time: 1ms
memory: 5900kb

input:

1919 810

output:

379720338

result:

ok 1 number(s): "379720338"

Test #16:

score: 0
Accepted
time: 1ms
memory: 5920kb

input:

1048 576

output:

216543264

result:

ok 1 number(s): "216543264"

Test #17:

score: 0
Accepted
time: 1ms
memory: 3956kb

input:

999 777

output:

635548531

result:

ok 1 number(s): "635548531"

Test #18:

score: 0
Accepted
time: 21ms
memory: 21040kb

input:

99999 77777

output:

448144614

result:

ok 1 number(s): "448144614"

Test #19:

score: 0
Accepted
time: 4ms
memory: 9848kb

input:

34527 6545

output:

748108997

result:

ok 1 number(s): "748108997"

Test #20:

score: 0
Accepted
time: 3ms
memory: 5964kb

input:

12345 12

output:

777496209

result:

ok 1 number(s): "777496209"

Test #21:

score: 0
Accepted
time: 1ms
memory: 5872kb

input:

1 1

output:

0

result:

ok 1 number(s): "0"

Test #22:

score: 0
Accepted
time: 22ms
memory: 21036kb

input:

100000 10101

output:

855985819

result:

ok 1 number(s): "855985819"

Test #23:

score: 0
Accepted
time: 23ms
memory: 21084kb

input:

100000 91919

output:

92446940

result:

ok 1 number(s): "92446940"

Test #24:

score: 0
Accepted
time: 22ms
memory: 21028kb

input:

100000 77979

output:

106899398

result:

ok 1 number(s): "106899398"

Test #25:

score: 0
Accepted
time: 3ms
memory: 6836kb

input:

10000 11

output:

326411649

result:

ok 1 number(s): "326411649"

Test #26:

score: 0
Accepted
time: 23ms
memory: 20912kb

input:

100000 2

output:

15322970

result:

ok 1 number(s): "15322970"

Test #27:

score: 0
Accepted
time: 25ms
memory: 21020kb

input:

100000 3

output:

93355797

result:

ok 1 number(s): "93355797"

Test #28:

score: 0
Accepted
time: 33ms
memory: 21072kb

input:

100000 99998

output:

331850772

result:

ok 1 number(s): "331850772"

Test #29:

score: 0
Accepted
time: 25ms
memory: 21028kb

input:

100000 99996

output:

885066226

result:

ok 1 number(s): "885066226"

Test #30:

score: 0
Accepted
time: 0ms
memory: 6220kb

input:

13115 2964

output:

0

result:

ok 1 number(s): "0"

Test #31:

score: 0
Accepted
time: 30ms
memory: 20988kb

input:

100000 17

output:

425792977

result:

ok 1 number(s): "425792977"

Test #32:

score: 0
Accepted
time: 26ms
memory: 21032kb

input:

99991 16

output:

667323936

result:

ok 1 number(s): "667323936"

Test #33:

score: 0
Accepted
time: 26ms
memory: 21032kb

input:

99991 17

output:

627396741

result:

ok 1 number(s): "627396741"

Test #34:

score: 0
Accepted
time: 15ms
memory: 20972kb

input:

99991 18

output:

874158501

result:

ok 1 number(s): "874158501"

Test #35:

score: 0
Accepted
time: 21ms
memory: 21024kb

input:

100000 100000

output:

99999

result:

ok 1 number(s): "99999"

Test #36:

score: 0
Accepted
time: 22ms
memory: 20132kb

input:

94229 94229

output:

94228

result:

ok 1 number(s): "94228"

Test #37:

score: 0
Accepted
time: 19ms
memory: 19968kb

input:

94229 94223

output:

476599876

result:

ok 1 number(s): "476599876"

Test #38:

score: 0
Accepted
time: 1ms
memory: 5820kb

input:

2 1

output:

0

result:

ok 1 number(s): "0"

Test #39:

score: 0
Accepted
time: 1ms
memory: 5932kb

input:

2 2

output:

0

result:

ok 1 number(s): "0"

Test #40:

score: 0
Accepted
time: 1ms
memory: 5836kb

input:

3 1

output:

0

result:

ok 1 number(s): "0"

Test #41:

score: 0
Accepted
time: 0ms
memory: 3892kb

input:

3 2

output:

2

result:

ok 1 number(s): "2"

Test #42:

score: 0
Accepted
time: 1ms
memory: 5816kb

input:

3 3

output:

2

result:

ok 1 number(s): "2"

Test #43:

score: 0
Accepted
time: 0ms
memory: 3788kb

input:

9 2

output:

44

result:

ok 1 number(s): "44"

Test #44:

score: 0
Accepted
time: 1ms
memory: 5876kb

input:

9 3

output:

206

result:

ok 1 number(s): "206"

Test #45:

score: 0
Accepted
time: 0ms
memory: 5868kb

input:

9 4

output:

441

result:

ok 1 number(s): "441"

Test #46:

score: 0
Accepted
time: 0ms
memory: 5884kb

input:

9 7

output:

224

result:

ok 1 number(s): "224"

Test #47:

score: 0
Accepted
time: 14ms
memory: 16196kb

input:

70839 22229

output:

0

result:

ok 1 number(s): "0"

Test #48:

score: 0
Accepted
time: 14ms
memory: 15224kb

input:

65536 17

output:

698801006

result:

ok 1 number(s): "698801006"

Test #49:

score: 0
Accepted
time: 13ms
memory: 15644kb

input:

65535 17

output:

433312902

result:

ok 1 number(s): "433312902"

Test #50:

score: 0
Accepted
time: 16ms
memory: 20932kb

input:

99856 317

output:

932131332

result:

ok 1 number(s): "932131332"

Test #51:

score: 0
Accepted
time: 24ms
memory: 20932kb

input:

99856 318

output:

398997854

result:

ok 1 number(s): "398997854"

Test #52:

score: 0
Accepted
time: 18ms
memory: 20944kb

input:

99856 2

output:

984791559

result:

ok 1 number(s): "984791559"

Test #53:

score: 0
Accepted
time: 23ms
memory: 21008kb

input:

100000 50000

output:

309108799

result:

ok 1 number(s): "309108799"

Extra Test:

score: 0
Extra Test Passed
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服务器时间: 2024-12-05 05:10:50 | 开源项目