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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
#661228#8774. Manhattan Walkcomeintocalm#AC ✓12ms11888kbC++20946b2024-10-20 15:22:272024-10-20 15:22:30

Judging History

你现在查看的是最新测评结果

  • [2024-10-20 15:22:30]
  • 评测
  • 测评结果:AC
  • 用时:12ms
  • 内存:11888kb
  • [2024-10-20 15:22:27]
  • 提交

answer

#include<bits/stdc++.h>

using namespace std;
const int N = 1e3+7;

double f[N][N], pw2[N*2];

int main() {
	double P, r, c;
	pw2[0] = 1.0;
	for(int i = 1; i <= 2002; i++) 
		pw2[i] = pw2[i - 1] * 0.50;
	cin >> r >> c >> P;
	
	for(int i = r; i >= 1; i--) {
		for(int j = c; j >= 1; j--) {
			if(i == r && j == c) continue;
			if(i == r) {
				f[i][j] = f[i][j + 1] + P * pw2[2];	
			}
			else if(j == c) {
				f[i][j] = f[i + 1][j] + P * pw2[2];	
			}
			
			else {
				//f[i][j] = pw2[1] * min(f[i + 1][j], f[i][j + 1] + P * pw2[1])
				//	+ pw2[1] * min(f[i][j + 1], f[i + 1][j] + P * pw2[1]);	
				double fx = f[i + 1][j], fy = f[i][j + 1];
				if(fx > fy) swap(fx, fy);
				
				if(fy >= fx + P) {
					f[i][j] = fx + P * pw2[2];	
				} else {
					f[i][j] = (P - fy + fx) * fy / (2*P) + fx / 2 + (fy - fx) * (fx + fy) / (4*P);	
				}
				
			}
		}
	}
	
	
	
	printf("%.8lf", f[1][1]);	
return 0;	
}

詳細信息

Test #1:

score: 100
Accepted
time: 1ms
memory: 3980kb

input:

2 3 8

output:

2.87500000

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:

2.43223387

result:

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

Test #3:

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

input:

1 1 1

output:

0.00000000

result:

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

Test #4:

score: 0
Accepted
time: 10ms
memory: 11724kb

input:

1000 1000 1000000000

output:

1782317138.80837584

result:

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

Test #5:

score: 0
Accepted
time: 1ms
memory: 4036kb

input:

1 4 5

output:

3.75000000

result:

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

Test #6:

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

input:

4 1 5

output:

3.75000000

result:

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

Test #7:

score: 0
Accepted
time: 0ms
memory: 3976kb

input:

1 1 1000000000

output:

0.00000000

result:

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

Test #8:

score: 0
Accepted
time: 0ms
memory: 3984kb

input:

1 2 1000000000

output:

250000000.00000000

result:

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

Test #9:

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

input:

2 1 1000000000

output:

250000000.00000000

result:

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

Test #10:

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

input:

1 2 1

output:

0.25000000

result:

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

Test #11:

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

input:

2 1 1

output:

0.25000000

result:

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

Test #12:

score: 0
Accepted
time: 0ms
memory: 3844kb

input:

1 10 3

output:

6.75000000

result:

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

Test #13:

score: 0
Accepted
time: 0ms
memory: 4016kb

input:

10 1 3

output:

6.75000000

result:

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

Test #14:

score: 0
Accepted
time: 10ms
memory: 11888kb

input:

997 993 998244353

output:

1779941051.34616065

result:

ok found '1779941051.3461607', expected '1779941051.3461628', error '0.0000000'

Test #15:

score: 0
Accepted
time: 6ms
memory: 11348kb

input:

988 313 886183312

output:

78753022570.48333740

result:

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

Test #16:

score: 0
Accepted
time: 0ms
memory: 8376kb

input:

583 286 322190846

output:

8636356976.84371758

result:

ok found '8636356976.8437176', expected '8636356976.8437138', error '0.0000000'

Test #17:

score: 0
Accepted
time: 7ms
memory: 10976kb

input:

892 468 494964816

output:

17125998682.72924042

result:

ok found '17125998682.7292404', expected '17125998682.7292328', error '0.0000000'

Test #18:

score: 0
Accepted
time: 1ms
memory: 4040kb

input:

26 882 386682745

output:

78231677700.75039673

result:

ok found '78231677700.7503967', expected '78231677700.7504883', error '0.0000000'

Test #19:

score: 0
Accepted
time: 12ms
memory: 10660kb

input:

867 926 422131798

output:

945100500.39910698

result:

ok found '945100500.3991070', expected '945100500.3991071', error '0.0000000'

Test #20:

score: 0
Accepted
time: 1ms
memory: 4100kb

input:

37 68 19

output:

62.28445988

result:

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

Test #21:

score: 0
Accepted
time: 0ms
memory: 3892kb

input:

23 90 80

output:

860.05069874

result:

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

Test #22:

score: 0
Accepted
time: 1ms
memory: 4176kb

input:

43 55 85

output:

118.38926797

result:

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

Test #23:

score: 0
Accepted
time: 1ms
memory: 4280kb

input:

93 66 43

output:

97.90484086

result:

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

Test #24:

score: 0
Accepted
time: 1ms
memory: 4228kb

input:

78 93 30

output:

44.84545233

result:

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

Test #25:

score: 0
Accepted
time: 0ms
memory: 4016kb

input:

9 5 481032867

output:

400507342.36673826

result:

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

Test #26:

score: 0
Accepted
time: 2ms
memory: 6528kb

input:

366 73 3

output:

149.48646423

result:

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

Test #27:

score: 0
Accepted
time: 0ms
memory: 4060kb

input:

6 4 5

output:

2.89464517

result:

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

Test #28:

score: 0
Accepted
time: 0ms
memory: 4012kb

input:

8 10 5

output:

3.39736085

result:

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

Test #29:

score: 0
Accepted
time: 0ms
memory: 3884kb

input:

10 1 7

output:

15.75000000

result:

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

Test #30:

score: 0
Accepted
time: 0ms
memory: 3824kb

input:

10 7 10

output:

7.37164661

result:

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

Test #31:

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

input:

2 8 1

output:

1.32710692

result:

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