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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
#438819#8774. Manhattan WalkZSH_ZSH#AC ✓16ms11236kbC++14692b2024-06-11 08:16:232024-06-11 08:16:23

Judging History

你现在查看的是最新测评结果

  • [2024-06-11 08:16:23]
  • 评测
  • 测评结果:AC
  • 用时:16ms
  • 内存:11236kb
  • [2024-06-11 08:16:23]
  • 提交

answer

#include<bits/stdc++.h>
#define rep(i,a,b) for (int i=(a);i<=(b);i++)
#define drep(i,a,b) for (int i=(a);i>=(b);i--)
typedef long long ll;
using namespace std;

int main()
{
	ios::sync_with_stdio(false); cin.tie(0);
	
	int n,m; cin>>n>>m;
	double p; cin>>p;
	
	vector<vector<double> > f(n,vector<double>(m));
	drep(i,m-2,0) f[n-1][i]=p/4+f[n-1][i+1];
	drep(i,n-2,0) f[i][m-1]=p/4+f[i+1][m-1];
	
	drep(i,n-2,0) drep(j,m-2,0)
	{
		double x=f[i+1][j],y=f[i][j+1];
		if (x<y) swap(x,y);
		f[i][j]=y/2;
		if (y+p<x)
		{
			f[i][j]+=(y+p/2)/2;
			continue;
		}
		double z=x-y;
		f[i][j]+=((z/p)*(y+z/2)+(1-z/p)*x)/2;
	}
	printf("%.10lf\n",f[0][0]);
	
	return 0;
}

详细

Test #1:

score: 100
Accepted
time: 1ms
memory: 3968kb

input:

2 3 8

output:

2.8750000000

result:

ok found '2.8750000', expected '2.8750000', error '0.0000000'

Test #2:

score: 0
Accepted
time: 0ms
memory: 3912kb

input:

5 5 5

output:

2.4322338689

result:

ok found '2.4322339', expected '2.4322339', error '0.0000000'

Test #3:

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

input:

1 1 1

output:

0.0000000000

result:

ok found '0.0000000', expected '0.0000000', error '-0.0000000'

Test #4:

score: 0
Accepted
time: 16ms
memory: 11236kb

input:

1000 1000 1000000000

output:

1782317138.8083753586

result:

ok found '1782317138.8083754', expected '1782317138.8083761', error '0.0000000'

Test #5:

score: 0
Accepted
time: 1ms
memory: 3932kb

input:

1 4 5

output:

3.7500000000

result:

ok found '3.7500000', expected '3.7500000', error '0.0000000'

Test #6:

score: 0
Accepted
time: 1ms
memory: 3932kb

input:

4 1 5

output:

3.7500000000

result:

ok found '3.7500000', expected '3.7500000', error '0.0000000'

Test #7:

score: 0
Accepted
time: 1ms
memory: 3792kb

input:

1 1 1000000000

output:

0.0000000000

result:

ok found '0.0000000', expected '0.0000000', error '-0.0000000'

Test #8:

score: 0
Accepted
time: 0ms
memory: 3816kb

input:

1 2 1000000000

output:

250000000.0000000000

result:

ok found '250000000.0000000', expected '250000000.0000000', error '0.0000000'

Test #9:

score: 0
Accepted
time: 0ms
memory: 4000kb

input:

2 1 1000000000

output:

250000000.0000000000

result:

ok found '250000000.0000000', expected '250000000.0000000', error '0.0000000'

Test #10:

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

input:

1 2 1

output:

0.2500000000

result:

ok found '0.2500000', expected '0.2500000', error '0.0000000'

Test #11:

score: 0
Accepted
time: 0ms
memory: 3936kb

input:

2 1 1

output:

0.2500000000

result:

ok found '0.2500000', expected '0.2500000', error '0.0000000'

Test #12:

score: 0
Accepted
time: 0ms
memory: 3760kb

input:

1 10 3

output:

6.7500000000

result:

ok found '6.7500000', expected '6.7500000', error '0.0000000'

Test #13:

score: 0
Accepted
time: 0ms
memory: 4008kb

input:

10 1 3

output:

6.7500000000

result:

ok found '6.7500000', expected '6.7500000', error '0.0000000'

Test #14:

score: 0
Accepted
time: 9ms
memory: 11188kb

input:

997 993 998244353

output:

1779941051.3461599350

result:

ok found '1779941051.3461599', expected '1779941051.3461628', error '0.0000000'

Test #15:

score: 0
Accepted
time: 5ms
memory: 6536kb

input:

988 313 886183312

output:

78753022570.4833374023

result:

ok found '78753022570.4833374', expected '78753022570.4833527', error '0.0000000'

Test #16:

score: 0
Accepted
time: 3ms
memory: 5148kb

input:

583 286 322190846

output:

8636356976.8437118530

result:

ok found '8636356976.8437119', expected '8636356976.8437138', error '0.0000000'

Test #17:

score: 0
Accepted
time: 6ms
memory: 7232kb

input:

892 468 494964816

output:

17125998682.7292423248

result:

ok found '17125998682.7292423', expected '17125998682.7292328', error '0.0000000'

Test #18:

score: 0
Accepted
time: 1ms
memory: 4068kb

input:

26 882 386682745

output:

78231677700.7504882812

result:

ok found '78231677700.7504883', expected '78231677700.7504883', error '0.0000000'

Test #19:

score: 0
Accepted
time: 8ms
memory: 9568kb

input:

867 926 422131798

output:

945100500.3991063833

result:

ok found '945100500.3991064', expected '945100500.3991071', error '0.0000000'

Test #20:

score: 0
Accepted
time: 0ms
memory: 3804kb

input:

37 68 19

output:

62.2844598802

result:

ok found '62.2844599', expected '62.2844599', error '0.0000000'

Test #21:

score: 0
Accepted
time: 1ms
memory: 3952kb

input:

23 90 80

output:

860.0506987358

result:

ok found '860.0506987', expected '860.0506987', error '0.0000000'

Test #22:

score: 0
Accepted
time: 0ms
memory: 3960kb

input:

43 55 85

output:

118.3892679676

result:

ok found '118.3892680', expected '118.3892680', error '0.0000000'

Test #23:

score: 0
Accepted
time: 1ms
memory: 3848kb

input:

93 66 43

output:

97.9048408588

result:

ok found '97.9048409', expected '97.9048409', error '0.0000000'

Test #24:

score: 0
Accepted
time: 1ms
memory: 4004kb

input:

78 93 30

output:

44.8454523265

result:

ok found '44.8454523', expected '44.8454523', error '0.0000000'

Test #25:

score: 0
Accepted
time: 0ms
memory: 3820kb

input:

9 5 481032867

output:

400507342.3667383194

result:

ok found '400507342.3667383', expected '400507342.3667384', error '0.0000000'

Test #26:

score: 0
Accepted
time: 1ms
memory: 4200kb

input:

366 73 3

output:

149.4864642331

result:

ok found '149.4864642', expected '149.4864642', error '0.0000000'

Test #27:

score: 0
Accepted
time: 1ms
memory: 3992kb

input:

6 4 5

output:

2.8946451697

result:

ok found '2.8946452', expected '2.8946452', error '0.0000000'

Test #28:

score: 0
Accepted
time: 0ms
memory: 3792kb

input:

8 10 5

output:

3.3973608525

result:

ok found '3.3973609', expected '3.3973609', error '0.0000000'

Test #29:

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

input:

10 1 7

output:

15.7500000000

result:

ok found '15.7500000', expected '15.7500000', error '0.0000000'

Test #30:

score: 0
Accepted
time: 0ms
memory: 3724kb

input:

10 7 10

output:

7.3716466074

result:

ok found '7.3716466', expected '7.3716466', error '0.0000000'

Test #31:

score: 0
Accepted
time: 0ms
memory: 4032kb

input:

2 8 1

output:

1.3271069195

result:

ok found '1.3271069', expected '1.3271069', error '0.0000000'