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#824592#9778. Brotatoucup-team3161#AC ✓191ms790284kbC++17854b2024-12-21 14:48:342024-12-21 14:48:42

Judging History

This is the latest submission verdict.

  • [2024-12-21 14:48:42]
  • Judged
  • Verdict: AC
  • Time: 191ms
  • Memory: 790284kb
Show
  • [2024-12-21 14:48:34]
  • Submitted

answer

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define db long double
#define eb emplace_back
#define mid ((l+r)/2)
const int N=1e5+5,up=500,M=up+5;
int n,m;db p,pw[N],w[N],f[M][N];
int main()
{
	scanf("%d %d %Lf",&n,&m,&p);
	m=min(m,up);
	pw[0]=1;
	for(int i=1;i<=n;++i) pw[i]=pw[i-1]*(1-p);
	for(int i=1;i<=n;++i) w[i]=w[i-1]+pw[i-1];
	for(int i=1;i<=n;++i) w[i]/=pw[i];
	f[0][0]=w[n];
	for(int i=n-1;i>=1;--i)
		f[0][i]=f[0][i+1]*(1-p)+f[0][0]*p+1;
	for(int i=1;i<=m;++i)
	{
		for(int j=n-1;j>=0;--j)
			f[i][j]=f[i][j+1]*(1-p)+f[i-1][j]*p+1;
		int l=1,r=n-1;
		while(l<=r)
		{
			db t=f[i][mid+1]+w[mid+1];
			if(t<f[i-1][mid]) l=mid+1;
			else r=mid-1;
		}
		f[i][0]=f[i][r+1]+w[r+1];
		for(int j=r;j>=1;--j)
			f[i][j]=f[i][j+1]*(1-p)+f[i][0]*p+1;
	}
	printf("%.10Lf\n",f[m][0]);
	return 0;
}
源文件, 语言: C++17

这程序好像有点Bug，我给组数据试试？

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 3880kb

input:

5 0
0.5

output:

62.0000000000

result:

ok found '62.000000000', expected '62.000000000', error '0.000000000'

Test #2:

score: 0
Accepted
time: 1ms
memory: 6012kb

input:

5 1
0.5

output:

47.0000000000

result:

ok found '47.000000000', expected '47.000000000', error '0.000000000'

Test #3:

score: 0
Accepted
time: 1ms
memory: 6076kb

input:

10000 0
0.002

output:

247489700298.2536833584

result:

ok found '247489700298.253692627', expected '247489700298.253692627', error '0.000000000'

Test #4:

score: 0
Accepted
time: 0ms
memory: 24292kb

input:

100000 10
0.0002

output:

38767507133.2322347909

result:

ok found '38767507133.232231140', expected '38767507133.232215881', error '0.000000000'

Test #5:

score: 0
Accepted
time: 3ms
memory: 8572kb

input:

100000 0
0.0002

output:

2430683127170.3768451214

result:

ok found '2430683127170.376953125', expected '2430683127170.376953125', error '0.000000000'

Test #6:

score: 0
Accepted
time: 24ms
memory: 39760kb

input:

100000 20
0.0002

output:

801073272.2316815020

result:

ok found '801073272.231681466', expected '801073272.231680870', error '0.000000000'

Test #7:

score: 0
Accepted
time: 20ms
memory: 71152kb

input:

100000 40
0.0002

output:

478148.7184263074

result:

ok found '478148.718426307', expected '478148.718426307', error '0.000000000'

Test #8:

score: 0
Accepted
time: 8ms
memory: 14832kb

input:

99995 4
0.0001

output:

38976542.8681758441

result:

ok found '38976542.868175842', expected '38976542.868175834', error '0.000000000'

Test #9:

score: 0
Accepted
time: 8ms
memory: 24468kb

input:

99995 10
0.0001

output:

3549184.5977120186

result:

ok found '3549184.597712019', expected '3549184.597712017', error '0.000000000'

Test #10:

score: 0
Accepted
time: 18ms
memory: 33556kb

input:

99995 16
0.0001

output:

399507.4705567422

result:

ok found '399507.470556742', expected '399507.470556742', error '0.000000000'

Test #11:

score: 0
Accepted
time: 3ms
memory: 20988kb

input:

99990 8
0.0001

output:

7773463.9479307238

result:

ok found '7773463.947930723', expected '7773463.947930722', error '0.000000000'

Test #12:

score: 0
Accepted
time: 8ms
memory: 24208kb

input:

99990 10
0.0001

output:

3547428.9454722985

result:

ok found '3547428.945472299', expected '3547428.945472297', error '0.000000000'

Test #13:

score: 0
Accepted
time: 3ms
memory: 27392kb

input:

99990 12
0.0001

output:

1647102.0204343962

result:

ok found '1647102.020434396', expected '1647102.020434395', error '0.000000000'

Test #14:

score: 0
Accepted
time: 1ms
memory: 6444kb

input:

16664 1
0.0012

output:

257920044630.8605458140

result:

ok found '257920044630.860534668', expected '257920044630.860534668', error '0.000000000'

Test #15:

score: 0
Accepted
time: 5ms
memory: 10224kb

input:

16664 21
0.0012

output:

92190688.5444150179

result:

ok found '92190688.544415012', expected '92190688.544415027', error '0.000000000'

Test #16:

score: 0
Accepted
time: 10ms
memory: 17044kb

input:

16664 41
0.0012

output:

59865.0917859199

result:

ok found '59865.091785920', expected '59865.091785920', error '0.000000000'

Test #17:

score: 0
Accepted
time: 0ms
memory: 7720kb

input:

16659 5
0.0003

output:

63366.2644069548

result:

ok found '63366.264406955', expected '63366.264406955', error '0.000000000'

Test #18:

score: 0
Accepted
time: 3ms
memory: 7588kb

input:

16659 11
0.0003

output:

18120.9118635425

result:

ok found '18120.911863543', expected '18120.911863543', error '0.000000000'

Test #19:

score: 0
Accepted
time: 4ms
memory: 11024kb

input:

16659 17
0.0003

output:

16666.5554519674

result:

ok found '16666.555451967', expected '16666.555451967', error '0.000000000'

Test #20:

score: 0
Accepted
time: 3ms
memory: 8776kb

input:

16654 9
0.0001

output:

16656.0794165756

result:

ok found '16656.079416576', expected '16656.079416576', error '0.000000000'

Test #21:

score: 0
Accepted
time: 3ms
memory: 9236kb

input:

16654 11
0.0001

output:

16655.6741221724

result:

ok found '16655.674122172', expected '16655.674122172', error '0.000000000'

Test #22:

score: 0
Accepted
time: 0ms
memory: 9636kb

input:

16654 13
0.0001

output:

16655.6656953627

result:

ok found '16655.665695363', expected '16655.665695363', error '0.000000000'

Test #23:

score: 0
Accepted
time: 0ms
memory: 4128kb

input:

2774 2
0.0072

output:

28951389306.9875141047

result:

ok found '28951389306.987514496', expected '28951389306.987514496', error '0.000000000'

Test #24:

score: 0
Accepted
time: 2ms
memory: 7144kb

input:

2774 22
0.0072

output:

11312241.4506539420

result:

ok found '11312241.450653942', expected '11312241.450653942', error '0.000000000'

Test #25:

score: 0
Accepted
time: 2ms
memory: 6016kb

input:

2774 42
0.0072

output:

8222.4151085086

result:

ok found '8222.415108509', expected '8222.415108509', error '0.000000000'

Test #26:

score: 0
Accepted
time: 1ms
memory: 6244kb

input:

2769 6
0.0021

output:

13600.5823557316

result:

ok found '13600.582355732', expected '13600.582355732', error '0.000000000'

Test #27:

score: 0
Accepted
time: 1ms
memory: 6544kb

input:

2769 12
0.0021

output:

3239.5499782111

result:

ok found '3239.549978211', expected '3239.549978211', error '0.000000000'

Test #28:

score: 0
Accepted
time: 0ms
memory: 6860kb

input:

2769 18
0.0021

output:

2776.6281948752

result:

ok found '2776.628194875', expected '2776.628194875', error '0.000000000'

Test #29:

score: 0
Accepted
time: 0ms
memory: 6456kb

input:

2764 10
0.0007

output:

2765.9870739551

result:

ok found '2765.987073955', expected '2765.987073955', error '0.000000000'

Test #30:

score: 0
Accepted
time: 1ms
memory: 4660kb

input:

2764 12
0.0007

output:

2765.9373628500

result:

ok found '2765.937362850', expected '2765.937362850', error '0.000000000'

Test #31:

score: 0
Accepted
time: 0ms
memory: 6620kb

input:

2764 14
0.0007

output:

2765.9361767035

result:

ok found '2765.936176704', expected '2765.936176704', error '0.000000000'

Test #32:

score: 0
Accepted
time: 191ms
memory: 790284kb

input:

100000 1000000000
0.0001

output:

100010.0010001001

result:

ok found '100010.001000100', expected '100010.001000100', error '0.000000000'

Test #33:

score: 0
Accepted
time: 0ms
memory: 8008kb

input:

1 1000000000
0.5

output:

2.0000000000

result:

ok found '2.000000000', expected '2.000000000', error '0.000000000'

Test #34:

score: 0
Accepted
time: 1ms
memory: 6172kb

input:

50 50
0.25

output:

66.7341873337

result:

ok found '66.734187334', expected '66.734187334', error '0.000000000'

Test #35:

score: 0
Accepted
time: 1ms
memory: 6396kb

input:

40 100
0.5

output:

788.6331239663

result:

ok found '788.633123966', expected '788.633123966', error '0.000000000'

Test #36:

score: 0
Accepted
time: 0ms
memory: 6660kb

input:

40 160
0.5

output:

80.0000002552

result:

ok found '80.000000255', expected '80.000000255', error '0.000000000'

Test #37:

score: 0
Accepted
time: 0ms
memory: 6724kb

input:

40 162
0.5

output:

80.0000000982

result:

ok found '80.000000098', expected '80.000000098', error '0.000000000'

Test #38:

score: 0
Accepted
time: 0ms
memory: 6204kb

input:

40 1000000000
0.5

output:

80.0000000000

result:

ok found '80.000000000', expected '80.000000000', error '0.000000000'

Test #39:

score: 0
Accepted
time: 0ms
memory: 3880kb

input:

40 0
0.5000

output:

2199023255550.0000000000

result:

ok found '2199023255550.000000000', expected '2199023255550.000000000', error '0.000000000'

Test #40:

score: 0
Accepted
time: 1ms
memory: 6012kb

input:

40 1
0.5000

output:

1649267441663.0000000000

result:

ok found '1649267441663.000000000', expected '1649267441663.000000000', error '0.000000000'

Test #41:

score: 0
Accepted
time: 0ms
memory: 3908kb

input:

40 2
0.5000

output:

1236950581248.2500000000

result:

ok found '1236950581248.250000000', expected '1236950581248.250000000', error '0.000000000'

Test #42:

score: 0
Accepted
time: 1ms
memory: 5868kb

input:

40 3
0.5000

output:

962072674305.0000000000

result:

ok found '962072674305.000000000', expected '962072674305.000000000', error '0.000000000'

Test #43:

score: 0
Accepted
time: 1ms
memory: 5960kb

input:

40 4
0.5000

output:

738734374914.2187500000

result:

ok found '738734374914.218750000', expected '738734374914.218750000', error '0.000000000'

Test #44:

score: 0
Accepted
time: 1ms
memory: 5948kb

input:

40 5
0.5000

output:

575525617666.9531250000

result:

ok found '575525617666.953125000', expected '575525617666.953125000', error '0.000000000'

Test #45:

score: 0
Accepted
time: 1ms
memory: 6056kb

input:

40 10
0.5000

output:

173409304583.1325683594

result:

ok found '173409304583.132568359', expected '173409304583.132568359', error '0.000000000'

Test #46:

score: 0
Accepted
time: 0ms
memory: 3948kb

input:

40 15
0.5000

output:

55390502923.0735082626

result:

ok found '55390502923.073509216', expected '55390502923.073509216', error '0.000000000'

Test #47:

score: 0
Accepted
time: 1ms
memory: 6104kb

input:

40 20
0.5000

output:

18180087821.7474045008

result:

ok found '18180087821.747406006', expected '18180087821.747406006', error '0.000000000'

Test #48:

score: 0
Accepted
time: 1ms
memory: 6124kb

input:

40 25
0.5000

output:

5963269457.3187836017

result:

ok found '5963269457.318783760', expected '5963269457.318783760', error '0.000000000'

Test #49:

score: 0
Accepted
time: 1ms
memory: 6064kb

input:

40 30
0.5000

output:

2008652291.2097989810

result:

ok found '2008652291.209799051', expected '2008652291.209799051', error '0.000000000'

Test #50:

score: 0
Accepted
time: 1ms
memory: 6140kb

input:

40 35
0.5000

output:

676323760.7668040633

result:

ok found '676323760.766804099', expected '676323760.766804099', error '0.000000000'

Test #51:

score: 0
Accepted
time: 1ms
memory: 6112kb

input:

40 40
0.5000

output:

231036317.1178015730

result:

ok found '231036317.117801577', expected '231036317.117801577', error '0.000000000'

Test #52:

score: 0
Accepted
time: 1ms
memory: 6212kb

input:

40 45
0.5000

output:

79224360.2456898969

result:

ok found '79224360.245689899', expected '79224360.245689899', error '0.000000000'

Test #53:

score: 0
Accepted
time: 1ms
memory: 4120kb

input:

40 50
0.5000

output:

27134304.8508336109

result:

ok found '27134304.850833610', expected '27134304.850833610', error '0.000000000'

Test #54:

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

input:

2 1
0.0001

output:

2.0002000300

result:

ok found '2.000200030', expected '2.000200030', error '0.000000000'

Test #55:

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

input:

2 0
0.0001

output:

2.0003000400

result:

ok found '2.000300040', expected '2.000300040', error '0.000000000'

Test #56:

score: 0
Accepted
time: 1ms
memory: 5956kb

input:

2 2
0.0001

output:

2.0002000200

result:

ok found '2.000200020', expected '2.000200020', error '0.000000000'

Test #57:

score: 0
Accepted
time: 1ms
memory: 5956kb

input:

2 3
0.0001

output:

2.0002000200

result:

ok found '2.000200020', expected '2.000200020', error '0.000000000'

Test #58:

score: 0
Accepted
time: 54ms
memory: 102324kb

input:

100000 60
0.0002

output:

100020.2748383050

result:

ok found '100020.274838305', expected '100020.274838305', error '0.000000000'

Test #59:

score: 0
Accepted
time: 36ms
memory: 133512kb

input:

100000 80
0.0002

output:

100020.0040008003

result:

ok found '100020.004000800', expected '100020.004000800', error '0.000000000'

Test #60:

score: 0
Accepted
time: 55ms
memory: 164828kb

input:

100000 100
0.0002

output:

100020.0040008002

result:

ok found '100020.004000800', expected '100020.004000800', error '0.000000000'

Test #61:

score: 0
Accepted
time: 51ms
memory: 196064kb

input:

100000 120
0.0002

output:

100020.0040008002

result:

ok found '100020.004000800', expected '100020.004000800', error '0.000000000'

Test #62:

score: 0
Accepted
time: 39ms
memory: 227404kb

input:

100000 140
0.0002

output:

100020.0040008002

result:

ok found '100020.004000800', expected '100020.004000800', error '0.000000000'

Test #63:

score: 0
Accepted
time: 67ms
memory: 289824kb

input:

100000 180
0.0002

output:

100020.0040008002

result:

ok found '100020.004000800', expected '100020.004000800', error '0.000000000'

Test #64:

score: 0
Accepted
time: 35ms
memory: 94860kb

input:

100000 55
0.0002

output:

100070.8503282033

result:

ok found '100070.850328203', expected '100070.850328203', error '0.000000000'

Test #65:

score: 0
Accepted
time: 32ms
memory: 86768kb

input:

100000 50
0.0002

output:

103207.6841930913

result:

ok found '103207.684193091', expected '103207.684193091', error '0.000000000'

Extra Test:

score: 0
Extra Test Passed
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服务器时间: 2025-02-08 18:57:59 | 开源项目