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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
#755084#9553. The Hermitucup-team191#AC ✓133ms47472kbC++231.6kb2024-11-16 16:25:222024-11-16 16:25:26

Judging History

你现在查看的是测评时间为 2024-11-16 16:25:26 的历史记录

  • [2024-11-18 19:48:17]
  • 自动重测本题所有获得100分的提交记录
  • 测评结果:AC
  • 用时:227ms
  • 内存:48152kb
  • [2024-11-18 19:43:48]
  • hack成功,自动添加数据
  • (/hack/1196)
  • [2024-11-16 16:25:26]
  • 评测
  • 测评结果:100
  • 用时:133ms
  • 内存:47472kb
  • [2024-11-16 16:25:22]
  • 提交

answer

#include <bits/stdc++.h>
#define x first
#define y second
using namespace std;
using ll=long long;
using vi=vector<int>;
using vl=vector<ll>;
using pii=pair<int,int>;
#define pb push_back
#define all(a) begin(a),end(a)

const int N=300010,MOD=998244353;
const char en='\n';
const ll LLINF=1ll<<60;
const int LOG = 20;

inline int add(int A, int B) {
	if(A + B >= MOD) return A + B - MOD;
	return A + B;
}

inline int sub(int A, int B) {
	if(A - B < 0) return A - B + MOD;
	return A - B; 
}

inline int mul(int A, int B) {
	return 1ll * A * B % MOD;
}

inline int pot(int A, int B) {
	int ret = 1;
	for(; B ; B >>= 1) {
		if(B & 1) ret = mul(ret, A);
		A = mul(A, A);
	}
	return ret;
}

int fak[N], inv[N];
vector < int > dj[N];

void precompute() {
	fak[0] = 1;
	for(int i = 1;i < N;i++) {
		fak[i] = mul(i, fak[i - 1]);
	}
	inv[N - 1] = pot(fak[N - 1], MOD - 2);
	for(int i = N - 2;i >= 0;i--)
		inv[i] = mul(i + 1, inv[i + 1]);
	for(int i = 1;i < N;i++) {
		for(int j = 2 * i;j < N;j += i)
			dj[j].pb(i);
	}
}

int choose(int n, int k) {
	if(k > n || k < 0) return 0;
	return mul(fak[n], mul(inv[k], inv[n - k]));
}

int n, m, puteva[N][LOG];

int main()
{
	ios_base::sync_with_stdio(0);
	cin.tie(0); precompute();
	cin >> n >> m;
	int sol = mul(m, choose(n, m));
	for(int i = 1;i <= n;i++) {
		puteva[i][1] = 1;
		for(int j = 2;j < LOG;j++) {
			for(int x : dj[i])
				puteva[i][j] = add(puteva[i][j], puteva[x][j - 1]);
		}
		for(int j = 1;j < LOG;j++) {
			sol = sub(sol, mul(puteva[i][j], choose(n / i - 1, m - j)));
		}
	}
	cout << sol << endl;
}

这程序好像有点Bug,我给组数据试试?

詳細信息

Test #1:

score: 100
Accepted
time: 82ms
memory: 38280kb

input:

4 3

output:

7

result:

ok 1 number(s): "7"

Test #2:

score: 0
Accepted
time: 98ms
memory: 38312kb

input:

11 4

output:

1187

result:

ok 1 number(s): "1187"

Test #3:

score: 0
Accepted
time: 115ms
memory: 46596kb

input:

100000 99999

output:

17356471

result:

ok 1 number(s): "17356471"

Test #4:

score: 0
Accepted
time: 85ms
memory: 39172kb

input:

11451 1919

output:

845616153

result:

ok 1 number(s): "845616153"

Test #5:

score: 0
Accepted
time: 115ms
memory: 46080kb

input:

99998 12345

output:

936396560

result:

ok 1 number(s): "936396560"

Test #6:

score: 0
Accepted
time: 117ms
memory: 46076kb

input:

100000 1

output:

0

result:

ok 1 number(s): "0"

Test #7:

score: 0
Accepted
time: 110ms
memory: 46076kb

input:

100000 15

output:

190067060

result:

ok 1 number(s): "190067060"

Test #8:

score: 0
Accepted
time: 81ms
memory: 38356kb

input:

10 3

output:

299

result:

ok 1 number(s): "299"

Test #9:

score: 0
Accepted
time: 92ms
memory: 38240kb

input:

10 4

output:

743

result:

ok 1 number(s): "743"

Test #10:

score: 0
Accepted
time: 76ms
memory: 38296kb

input:

10 5

output:

1129

result:

ok 1 number(s): "1129"

Test #11:

score: 0
Accepted
time: 100ms
memory: 38308kb

input:

15 6

output:

28006

result:

ok 1 number(s): "28006"

Test #12:

score: 0
Accepted
time: 79ms
memory: 38296kb

input:

15 7

output:

42035

result:

ok 1 number(s): "42035"

Test #13:

score: 0
Accepted
time: 84ms
memory: 38316kb

input:

123 45

output:

214851327

result:

ok 1 number(s): "214851327"

Test #14:

score: 0
Accepted
time: 84ms
memory: 38392kb

input:

998 244

output:

964050559

result:

ok 1 number(s): "964050559"

Test #15:

score: 0
Accepted
time: 84ms
memory: 38412kb

input:

1919 810

output:

379720338

result:

ok 1 number(s): "379720338"

Test #16:

score: 0
Accepted
time: 87ms
memory: 38396kb

input:

1048 576

output:

216543264

result:

ok 1 number(s): "216543264"

Test #17:

score: 0
Accepted
time: 87ms
memory: 38340kb

input:

999 777

output:

635548531

result:

ok 1 number(s): "635548531"

Test #18:

score: 0
Accepted
time: 111ms
memory: 46328kb

input:

99999 77777

output:

448144614

result:

ok 1 number(s): "448144614"

Test #19:

score: 0
Accepted
time: 100ms
memory: 40968kb

input:

34527 6545

output:

748108997

result:

ok 1 number(s): "748108997"

Test #20:

score: 0
Accepted
time: 95ms
memory: 39324kb

input:

12345 12

output:

777496209

result:

ok 1 number(s): "777496209"

Test #21:

score: 0
Accepted
time: 91ms
memory: 38312kb

input:

1 1

output:

0

result:

ok 1 number(s): "0"

Test #22:

score: 0
Accepted
time: 117ms
memory: 46136kb

input:

100000 10101

output:

855985819

result:

ok 1 number(s): "855985819"

Test #23:

score: 0
Accepted
time: 115ms
memory: 46124kb

input:

100000 91919

output:

92446940

result:

ok 1 number(s): "92446940"

Test #24:

score: 0
Accepted
time: 129ms
memory: 46128kb

input:

100000 77979

output:

106899398

result:

ok 1 number(s): "106899398"

Test #25:

score: 0
Accepted
time: 103ms
memory: 39112kb

input:

10000 11

output:

326411649

result:

ok 1 number(s): "326411649"

Test #26:

score: 0
Accepted
time: 133ms
memory: 46112kb

input:

100000 2

output:

15322970

result:

ok 1 number(s): "15322970"

Test #27:

score: 0
Accepted
time: 116ms
memory: 46892kb

input:

100000 3

output:

93355797

result:

ok 1 number(s): "93355797"

Test #28:

score: 0
Accepted
time: 111ms
memory: 47096kb

input:

100000 99998

output:

331850772

result:

ok 1 number(s): "331850772"

Test #29:

score: 0
Accepted
time: 111ms
memory: 46076kb

input:

100000 99996

output:

885066226

result:

ok 1 number(s): "885066226"

Test #30:

score: 0
Accepted
time: 89ms
memory: 39328kb

input:

13115 2964

output:

0

result:

ok 1 number(s): "0"

Test #31:

score: 0
Accepted
time: 125ms
memory: 46952kb

input:

100000 17

output:

425792977

result:

ok 1 number(s): "425792977"

Test #32:

score: 0
Accepted
time: 117ms
memory: 46072kb

input:

99991 16

output:

667323936

result:

ok 1 number(s): "667323936"

Test #33:

score: 0
Accepted
time: 120ms
memory: 47472kb

input:

99991 17

output:

627396741

result:

ok 1 number(s): "627396741"

Test #34:

score: 0
Accepted
time: 111ms
memory: 46628kb

input:

99991 18

output:

874158501

result:

ok 1 number(s): "874158501"

Test #35:

score: 0
Accepted
time: 115ms
memory: 46128kb

input:

100000 100000

output:

99999

result:

ok 1 number(s): "99999"

Test #36:

score: 0
Accepted
time: 106ms
memory: 45668kb

input:

94229 94229

output:

94228

result:

ok 1 number(s): "94228"

Test #37:

score: 0
Accepted
time: 105ms
memory: 45600kb

input:

94229 94223

output:

476599876

result:

ok 1 number(s): "476599876"

Test #38:

score: 0
Accepted
time: 81ms
memory: 38228kb

input:

2 1

output:

0

result:

ok 1 number(s): "0"

Test #39:

score: 0
Accepted
time: 87ms
memory: 38292kb

input:

2 2

output:

0

result:

ok 1 number(s): "0"

Test #40:

score: 0
Accepted
time: 82ms
memory: 38264kb

input:

3 1

output:

0

result:

ok 1 number(s): "0"

Test #41:

score: 0
Accepted
time: 82ms
memory: 38320kb

input:

3 2

output:

2

result:

ok 1 number(s): "2"

Test #42:

score: 0
Accepted
time: 83ms
memory: 38384kb

input:

3 3

output:

2

result:

ok 1 number(s): "2"

Test #43:

score: 0
Accepted
time: 79ms
memory: 38280kb

input:

9 2

output:

44

result:

ok 1 number(s): "44"

Test #44:

score: 0
Accepted
time: 89ms
memory: 38320kb

input:

9 3

output:

206

result:

ok 1 number(s): "206"

Test #45:

score: 0
Accepted
time: 87ms
memory: 38264kb

input:

9 4

output:

441

result:

ok 1 number(s): "441"

Test #46:

score: 0
Accepted
time: 88ms
memory: 38244kb

input:

9 7

output:

224

result:

ok 1 number(s): "224"

Test #47:

score: 0
Accepted
time: 108ms
memory: 43816kb

input:

70839 22229

output:

0

result:

ok 1 number(s): "0"

Test #48:

score: 0
Accepted
time: 87ms
memory: 43480kb

input:

65536 17

output:

698801006

result:

ok 1 number(s): "698801006"

Test #49:

score: 0
Accepted
time: 108ms
memory: 43404kb

input:

65535 17

output:

433312902

result:

ok 1 number(s): "433312902"

Test #50:

score: 0
Accepted
time: 117ms
memory: 46064kb

input:

99856 317

output:

932131332

result:

ok 1 number(s): "932131332"

Test #51:

score: 0
Accepted
time: 115ms
memory: 47308kb

input:

99856 318

output:

398997854

result:

ok 1 number(s): "398997854"

Test #52:

score: 0
Accepted
time: 113ms
memory: 46080kb

input:

99856 2

output:

984791559

result:

ok 1 number(s): "984791559"

Test #53:

score: 0
Accepted
time: 121ms
memory: 47084kb

input:

100000 50000

output:

309108799

result:

ok 1 number(s): "309108799"

Extra Test:

score: 0
Extra Test Passed