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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
#761507#9553. The HermitxuzhihaodedieAC ✓66ms28308kbC++201.5kb2024-11-18 23:51:192024-11-18 23:51:21

Judging History

你现在查看的是最新测评结果

  • [2024-11-18 23:51:21]
  • 评测
  • 测评结果:AC
  • 用时:66ms
  • 内存:28308kb
  • [2024-11-18 23:51:19]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define PII pair<int,int>
//#define endl '\n'
#define lson 2*p
#define rson 2*p+1
const int N=3e5+10;
const int mod=998244353;
int fact[N],infact[N];
int dp[25][N],vis[N],p[N],cnt;
int qpow(int a,int b) {
    if(b==0) return 1;
    if(b&1) return a*qpow(a,b-1)%mod;
    else {
        int mul=qpow(a,b/2);
        return mul*mul%mod;
    }
}
void init() {
    infact[0]=fact[0]=1;
    for(int i=1;i<N;i++) fact[i]=fact[i-1]*i%mod;
    infact[N-1]=qpow(fact[N-1],mod-2);
    for(int i=N-2;i>=1;i--) infact[i]=infact[i+1]*(i+1)%mod;
}
int C(int n,int m) {
    if(n<m) return 0;
    return fact[n]*infact[m]%mod*infact[n-m]%mod;
}
void add(int &x,int y) {
    x+=y;
    if(x>=mod) x-=mod;
}
void solve() {
    int n,m;
    cin>>m>>n;
    for(int i=1;i<=m;i++) dp[1][i]=1;
    for(int i=1;i<=m;i++) {
        for(int j=i+i;j<=m;j+=i) {
            for(int c=1;c<20;c++) {
                add(dp[c+1][j],dp[c][i]);
            }
        }
    }
    int ans=0;
    for(int x=1;x<=m;x++) {
        for(int c=1;c<=20;c++) {
            // printf("dp[%d][%d]=%lld\n",c,x,dp[c][x]);
            add(ans,dp[c][x]*C(m/x-1,n-c)%mod);
        }
    }
    ans=(C(m,n)*n%mod-ans+mod)%mod;
    cout<<ans<<endl;
}
signed main() {
    int T=1;
    ios::sync_with_stdio(false);
    cin.tie(0);
    init();
    // freopen("in.txt","r",stdin);
    // freopen("out.txt","w",stdout);
    // cin>>T;
    while(T--) {
        solve();
    }
}

这程序好像有点Bug,我给组数据试试?

详细

Test #1:

score: 100
Accepted
time: 4ms
memory: 10804kb

input:

4 3

output:

7

result:

ok 1 number(s): "7"

Test #2:

score: 0
Accepted
time: 4ms
memory: 12296kb

input:

11 4

output:

1187

result:

ok 1 number(s): "1187"

Test #3:

score: 0
Accepted
time: 53ms
memory: 27284kb

input:

100000 99999

output:

17356471

result:

ok 1 number(s): "17356471"

Test #4:

score: 0
Accepted
time: 0ms
memory: 13536kb

input:

11451 1919

output:

845616153

result:

ok 1 number(s): "845616153"

Test #5:

score: 0
Accepted
time: 53ms
memory: 26928kb

input:

99998 12345

output:

936396560

result:

ok 1 number(s): "936396560"

Test #6:

score: 0
Accepted
time: 66ms
memory: 27252kb

input:

100000 1

output:

0

result:

ok 1 number(s): "0"

Test #7:

score: 0
Accepted
time: 57ms
memory: 26388kb

input:

100000 15

output:

190067060

result:

ok 1 number(s): "190067060"

Test #8:

score: 0
Accepted
time: 2ms
memory: 11888kb

input:

10 3

output:

299

result:

ok 1 number(s): "299"

Test #9:

score: 0
Accepted
time: 2ms
memory: 11456kb

input:

10 4

output:

743

result:

ok 1 number(s): "743"

Test #10:

score: 0
Accepted
time: 0ms
memory: 11204kb

input:

10 5

output:

1129

result:

ok 1 number(s): "1129"

Test #11:

score: 0
Accepted
time: 5ms
memory: 11892kb

input:

15 6

output:

28006

result:

ok 1 number(s): "28006"

Test #12:

score: 0
Accepted
time: 4ms
memory: 12476kb

input:

15 7

output:

42035

result:

ok 1 number(s): "42035"

Test #13:

score: 0
Accepted
time: 4ms
memory: 11460kb

input:

123 45

output:

214851327

result:

ok 1 number(s): "214851327"

Test #14:

score: 0
Accepted
time: 0ms
memory: 12420kb

input:

998 244

output:

964050559

result:

ok 1 number(s): "964050559"

Test #15:

score: 0
Accepted
time: 5ms
memory: 11700kb

input:

1919 810

output:

379720338

result:

ok 1 number(s): "379720338"

Test #16:

score: 0
Accepted
time: 0ms
memory: 12124kb

input:

1048 576

output:

216543264

result:

ok 1 number(s): "216543264"

Test #17:

score: 0
Accepted
time: 4ms
memory: 11944kb

input:

999 777

output:

635548531

result:

ok 1 number(s): "635548531"

Test #18:

score: 0
Accepted
time: 57ms
memory: 28092kb

input:

99999 77777

output:

448144614

result:

ok 1 number(s): "448144614"

Test #19:

score: 0
Accepted
time: 12ms
memory: 16604kb

input:

34527 6545

output:

748108997

result:

ok 1 number(s): "748108997"

Test #20:

score: 0
Accepted
time: 4ms
memory: 14112kb

input:

12345 12

output:

777496209

result:

ok 1 number(s): "777496209"

Test #21:

score: 0
Accepted
time: 0ms
memory: 11624kb

input:

1 1

output:

0

result:

ok 1 number(s): "0"

Test #22:

score: 0
Accepted
time: 54ms
memory: 26780kb

input:

100000 10101

output:

855985819

result:

ok 1 number(s): "855985819"

Test #23:

score: 0
Accepted
time: 58ms
memory: 26636kb

input:

100000 91919

output:

92446940

result:

ok 1 number(s): "92446940"

Test #24:

score: 0
Accepted
time: 58ms
memory: 28192kb

input:

100000 77979

output:

106899398

result:

ok 1 number(s): "106899398"

Test #25:

score: 0
Accepted
time: 8ms
memory: 13644kb

input:

10000 11

output:

326411649

result:

ok 1 number(s): "326411649"

Test #26:

score: 0
Accepted
time: 60ms
memory: 26540kb

input:

100000 2

output:

15322970

result:

ok 1 number(s): "15322970"

Test #27:

score: 0
Accepted
time: 63ms
memory: 26208kb

input:

100000 3

output:

93355797

result:

ok 1 number(s): "93355797"

Test #28:

score: 0
Accepted
time: 53ms
memory: 26360kb

input:

100000 99998

output:

331850772

result:

ok 1 number(s): "331850772"

Test #29:

score: 0
Accepted
time: 65ms
memory: 27392kb

input:

100000 99996

output:

885066226

result:

ok 1 number(s): "885066226"

Test #30:

score: 0
Accepted
time: 4ms
memory: 13636kb

input:

13115 2964

output:

0

result:

ok 1 number(s): "0"

Test #31:

score: 0
Accepted
time: 50ms
memory: 27556kb

input:

100000 17

output:

425792977

result:

ok 1 number(s): "425792977"

Test #32:

score: 0
Accepted
time: 59ms
memory: 27484kb

input:

99991 16

output:

667323936

result:

ok 1 number(s): "667323936"

Test #33:

score: 0
Accepted
time: 60ms
memory: 26960kb

input:

99991 17

output:

627396741

result:

ok 1 number(s): "627396741"

Test #34:

score: 0
Accepted
time: 58ms
memory: 26656kb

input:

99991 18

output:

874158501

result:

ok 1 number(s): "874158501"

Test #35:

score: 0
Accepted
time: 58ms
memory: 28308kb

input:

100000 100000

output:

99999

result:

ok 1 number(s): "99999"

Test #36:

score: 0
Accepted
time: 61ms
memory: 25612kb

input:

94229 94229

output:

94228

result:

ok 1 number(s): "94228"

Test #37:

score: 0
Accepted
time: 57ms
memory: 24608kb

input:

94229 94223

output:

476599876

result:

ok 1 number(s): "476599876"

Test #38:

score: 0
Accepted
time: 5ms
memory: 12140kb

input:

2 1

output:

0

result:

ok 1 number(s): "0"

Test #39:

score: 0
Accepted
time: 4ms
memory: 12180kb

input:

2 2

output:

0

result:

ok 1 number(s): "0"

Test #40:

score: 0
Accepted
time: 0ms
memory: 10656kb

input:

3 1

output:

0

result:

ok 1 number(s): "0"

Test #41:

score: 0
Accepted
time: 4ms
memory: 11016kb

input:

3 2

output:

2

result:

ok 1 number(s): "2"

Test #42:

score: 0
Accepted
time: 4ms
memory: 10868kb

input:

3 3

output:

2

result:

ok 1 number(s): "2"

Test #43:

score: 0
Accepted
time: 2ms
memory: 11552kb

input:

9 2

output:

44

result:

ok 1 number(s): "44"

Test #44:

score: 0
Accepted
time: 4ms
memory: 10524kb

input:

9 3

output:

206

result:

ok 1 number(s): "206"

Test #45:

score: 0
Accepted
time: 4ms
memory: 10880kb

input:

9 4

output:

441

result:

ok 1 number(s): "441"

Test #46:

score: 0
Accepted
time: 0ms
memory: 11444kb

input:

9 7

output:

224

result:

ok 1 number(s): "224"

Test #47:

score: 0
Accepted
time: 36ms
memory: 22288kb

input:

70839 22229

output:

0

result:

ok 1 number(s): "0"

Test #48:

score: 0
Accepted
time: 34ms
memory: 21324kb

input:

65536 17

output:

698801006

result:

ok 1 number(s): "698801006"

Test #49:

score: 0
Accepted
time: 36ms
memory: 20252kb

input:

65535 17

output:

433312902

result:

ok 1 number(s): "433312902"

Test #50:

score: 0
Accepted
time: 50ms
memory: 27256kb

input:

99856 317

output:

932131332

result:

ok 1 number(s): "932131332"

Test #51:

score: 0
Accepted
time: 62ms
memory: 26284kb

input:

99856 318

output:

398997854

result:

ok 1 number(s): "398997854"

Test #52:

score: 0
Accepted
time: 63ms
memory: 26336kb

input:

99856 2

output:

984791559

result:

ok 1 number(s): "984791559"

Test #53:

score: 0
Accepted
time: 51ms
memory: 28092kb

input:

100000 50000

output:

309108799

result:

ok 1 number(s): "309108799"

Extra Test:

score: 0
Extra Test Passed