QOJ.ac

QOJ

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
#427827#8774. Manhattan Walkucup-team3555#AC ✓15ms11864kbC++14885b2024-06-01 16:04:292024-06-01 16:04:31

Judging History

你现在查看的是最新测评结果

  • [2024-06-01 16:04:31]
  • 评测
  • 测评结果:AC
  • 用时:15ms
  • 内存:11864kb
  • [2024-06-01 16:04:29]
  • 提交

answer

# include <bits/stdc++.h>

const int N=100010,INF=0x3f3f3f3f;

inline int read(void){
	int res,f=1;
	char c;
	while((c=getchar())<'0'||c>'9')
		if(c=='-') f=-1;
	res=c-48;
	while((c=getchar())>='0'&&c<='9')
		res=res*10+c-48;
	return res*f;
}

int n,m;
double p;
double f[1010][1010];

double rinf=1e14;

int main(void){
	n=read(),m=read(),p=read();
	
	for(int i=1;i<=n+1;++i) for(int j=1;j<=m+1;++j) f[i][j]=rinf;
	
	for(int i=n;i;--i){
		for(int j=m;j;--j){
			if(i==n&&j==m){
				f[i][j]=0;
				continue;
			}
			double A=f[i][j+1],B=f[i+1][j];
			f[i][j]=0;
			double lim=std::max(A-B,0.0);
			lim=std::min(lim,p);			
			f[i][j]+=(B*lim+0.5*lim*lim+A*(p-lim))/p;
			std::swap(A,B),lim=std::max(A-B,0.0),lim=std::min(lim,p);
			f[i][j]+=(B*lim+0.5*lim*lim+A*(p-lim))/p;
			f[i][j]*=0.5;
		}
	}
	
	printf("%.12lf",f[1][1]);

	return 0;
}

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 3932kb

input:

2 3 8

output:

2.875000000000

result:

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

Test #2:

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

input:

5 5 5

output:

2.432233868874

result:

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

Test #3:

score: 0
Accepted
time: 0ms
memory: 3916kb

input:

1 1 1

output:

0.000000000000

result:

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

Test #4:

score: 0
Accepted
time: 15ms
memory: 11864kb

input:

1000 1000 1000000000

output:

1782317138.808375835419

result:

ok found '1782317138.8083758', expected '1782317138.8083761', error '0.0000000'

Test #5:

score: 0
Accepted
time: 1ms
memory: 3988kb

input:

1 4 5

output:

3.750000000000

result:

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

Test #6:

score: 0
Accepted
time: 0ms
memory: 3828kb

input:

4 1 5

output:

3.750000000000

result:

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

Test #7:

score: 0
Accepted
time: 0ms
memory: 3928kb

input:

1 1 1000000000

output:

0.000000000000

result:

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

Test #8:

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

input:

1 2 1000000000

output:

250000000.000000000000

result:

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

Test #9:

score: 0
Accepted
time: 0ms
memory: 3924kb

input:

2 1 1000000000

output:

250000000.000000000000

result:

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

Test #10:

score: 0
Accepted
time: 1ms
memory: 3920kb

input:

1 2 1

output:

0.250000000000

result:

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

Test #11:

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

input:

2 1 1

output:

0.250000000000

result:

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

Test #12:

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

input:

1 10 3

output:

6.750000000000

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:

6.750000000000

result:

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

Test #14:

score: 0
Accepted
time: 15ms
memory: 11664kb

input:

997 993 998244353

output:

1779941051.346159458160

result:

ok found '1779941051.3461595', expected '1779941051.3461628', error '0.0000000'

Test #15:

score: 0
Accepted
time: 3ms
memory: 11392kb

input:

988 313 886183312

output:

78753022570.483337402344

result:

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

Test #16:

score: 0
Accepted
time: 2ms
memory: 9004kb

input:

583 286 322190846

output:

8636356976.843711853027

result:

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

Test #17:

score: 0
Accepted
time: 9ms
memory: 11620kb

input:

892 468 494964816

output:

17125998682.729242324829

result:

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

Test #18:

score: 0
Accepted
time: 0ms
memory: 4088kb

input:

26 882 386682745

output:

78231677700.750427246094

result:

ok found '78231677700.7504272', expected '78231677700.7504883', error '0.0000000'

Test #19:

score: 0
Accepted
time: 11ms
memory: 11016kb

input:

867 926 422131798

output:

945100500.399107098579

result:

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

Test #20:

score: 0
Accepted
time: 1ms
memory: 5996kb

input:

37 68 19

output:

62.284459880159

result:

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

Test #21:

score: 0
Accepted
time: 0ms
memory: 3988kb

input:

23 90 80

output:

860.050698735791

result:

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

Test #22:

score: 0
Accepted
time: 1ms
memory: 4076kb

input:

43 55 85

output:

118.389267967564

result:

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

Test #23:

score: 0
Accepted
time: 1ms
memory: 4340kb

input:

93 66 43

output:

97.904840858751

result:

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

Test #24:

score: 0
Accepted
time: 1ms
memory: 6092kb

input:

78 93 30

output:

44.845452326451

result:

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

Test #25:

score: 0
Accepted
time: 0ms
memory: 3964kb

input:

9 5 481032867

output:

400507342.366738319397

result:

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

Test #26:

score: 0
Accepted
time: 0ms
memory: 8464kb

input:

366 73 3

output:

149.486464233096

result:

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

Test #27:

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

input:

6 4 5

output:

2.894645169729

result:

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

Test #28:

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

input:

8 10 5

output:

3.397360852475

result:

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

Test #29:

score: 0
Accepted
time: 1ms
memory: 4024kb

input:

10 1 7

output:

15.750000000000

result:

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

Test #30:

score: 0
Accepted
time: 0ms
memory: 3964kb

input:

10 7 10

output:

7.371646607394

result:

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

Test #31:

score: 0
Accepted
time: 0ms
memory: 3864kb

input:

2 8 1

output:

1.327106919466

result:

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