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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
#48537#4003. Rounding Mastersdxl_love_summerAC ✓3ms3824kbC++14763b2022-09-14 15:08:542022-09-14 15:08:56

Judging History

This is the latest submission verdict.

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2022-09-14 15:08:56]
  • Judged
  • Verdict: AC
  • Time: 3ms
  • Memory: 3824kb
Show
  • [2022-09-14 15:08:54]
  • Submitted

answer

#include<bits/stdc++.h>
#define ll long long
using namespace std;
inline ll read(){
	ll x = 0,w = 1;
	char c = getchar();
	while(c < '0' || c > '9'){if(c == '-')w = -1;c = getchar();}
	while(c >= '0' && c <= '9'){x = (x << 3) + (x << 1) + c - '0';c = getchar();}
	return x * w;
}
ll n,k;
int main(){
	n = read(),k = read();
	if(n == 1){
		printf("0.50000000000\n");
		return 0;
	}
	double l = 1.5,r = 2e18;
	for(int i = 1;i <= 500;i++){
		double mid = (l + r) / 2;
		ll x = 1;
		bool f = 0;
		for(int j = 1;j <= k;j++){
			if(x * mid > 1.5e18){
				f = 1;
				break;
			}
			x = (ll)(x * mid + 0.5);
			if(x >= n){
				f = 1;
				break;
			}
		}
		if(f) r = mid;
		else l = mid;
	}
	printf("%.10lf",(l + r) / 2);
	return 0;
}
源文件, 语言: C++14

詳細信息

Test #1:

score: 100
Accepted
time: 3ms
memory: 3756kb

input:

18 4

output:

2.1250000000

result:

ok found '2.1250000', expected '2.1250000', error '0.0000000'

Test #2:

score: 0
Accepted
time: 2ms
memory: 3596kb

input:

1 1

output:

0.50000000000

result:

ok found '0.5000000', expected '0.5000000', error '0.0000000'

Test #3:

score: 0
Accepted
time: 2ms
memory: 3752kb

input:

1000000000000000000 1000000000000000000

output:

1.5000000000

result:

ok found '1.5000000', expected '1.5000000', error '0.0000000'

Test #4:

score: 0
Accepted
time: 0ms
memory: 3692kb

input:

2 100000

output:

1.5000000000

result:

ok found '1.5000000', expected '1.5000000', error '0.0000000'

Test #5:

score: 0
Accepted
time: 2ms
memory: 3688kb

input:

1 1000000000000000000

output:

0.50000000000

result:

ok found '0.5000000', expected '0.5000000', error '0.0000000'

Test #6:

score: 0
Accepted
time: 1ms
memory: 3736kb

input:

1000000000000000000 1

output:

1000000000000000000.0000000000

result:

ok found '1000000000000000000.0000000', expected '1000000000000000000.0000000', error '0.0000000'

Test #7:

score: 0
Accepted
time: 1ms
memory: 3700kb

input:

2 1000000000000000000

output:

1.5000000000

result:

ok found '1.5000000', expected '1.5000000', error '0.0000000'

Test #8:

score: 0
Accepted
time: 2ms
memory: 3676kb

input:

1000000000000000000 2

output:

1000000000.0000000000

result:

ok found '1000000000.0000000', expected '1000000000.0000000', error '0.0000000'

Test #9:

score: 0
Accepted
time: 2ms
memory: 3780kb

input:

265714758284843011 6476356347841896

output:

1.5000000000

result:

ok found '1.5000000', expected '1.5000000', error '0.0000000'

Test #10:

score: 0
Accepted
time: 2ms
memory: 3660kb

input:

266540997167959139 92

output:

1.5416666667

result:

ok found '1.5416667', expected '1.5416667', error '0.0000000'

Test #11:

score: 0
Accepted
time: 2ms
memory: 3608kb

input:

998169857863230070 46

output:

2.4740667096

result:

ok found '2.4740667', expected '2.4740667', error '0.0000000'

Test #12:

score: 0
Accepted
time: 1ms
memory: 3692kb

input:

762322967106512617 94

output:

1.5442883895

result:

ok found '1.5442884', expected '1.5442884', error '0.0000000'

Test #13:

score: 0
Accepted
time: 0ms
memory: 3772kb

input:

494087735053841727 1

output:

494087735053841664.0000000000

result:

ok found '494087735053841664.0000000', expected '494087735053841728.0000000', error '0.0000000'

Test #14:

score: 0
Accepted
time: 2ms
memory: 3740kb

input:

58564077538358873 97

output:

1.5000000000

result:

ok found '1.5000000', expected '1.5000000', error '0.0000000'

Test #15:

score: 0
Accepted
time: 2ms
memory: 3772kb

input:

518101003270379436 40

output:

2.7699947151

result:

ok found '2.7699947', expected '2.7699947', error '0.0000000'

Test #16:

score: 0
Accepted
time: 2ms
memory: 3656kb

input:

278796295010358752 12

output:

28.4697449081

result:

ok found '28.4697449', expected '28.4697449', error '0.0000000'

Test #17:

score: 0
Accepted
time: 2ms
memory: 3704kb

input:

679814304673935850 67

output:

1.8424368301

result:

ok found '1.8424368', expected '1.8424368', error '0.0000000'

Test #18:

score: 0
Accepted
time: 2ms
memory: 3704kb

input:

963457718519969787 22

output:

6.5473153709

result:

ok found '6.5473154', expected '6.5473154', error '0.0000000'

Test #19:

score: 0
Accepted
time: 2ms
memory: 3732kb

input:

267367244641009859 41

output:

2.6529506629

result:

ok found '2.6529507', expected '2.6529507', error '0.0000000'

Test #20:

score: 0
Accepted
time: 2ms
memory: 3776kb

input:

740983904691688417 65

output:

1.8775968192

result:

ok found '1.8775968', expected '1.8775968', error '0.0000000'

Test #21:

score: 0
Accepted
time: 0ms
memory: 3660kb

input:

941365965213552512 82

output:

1.6553168405

result:

ok found '1.6553168', expected '1.6553168', error '0.0000000'

Test #22:

score: 0
Accepted
time: 2ms
memory: 3740kb

input:

284337374294498000 38

output:

2.8722016496

result:

ok found '2.8722016', expected '2.8722016', error '0.0000000'

Test #23:

score: 0
Accepted
time: 2ms
memory: 3688kb

input:

812120465372795700 38

output:

2.9563154765

result:

ok found '2.9563155', expected '2.9563155', error '0.0000000'

Test #24:

score: 0
Accepted
time: 2ms
memory: 3824kb

input:

564561304973603673 7

output:

343.5000000000

result:

ok found '343.5000000', expected '343.5000000', error '0.0000000'

Test #25:

score: 0
Accepted
time: 2ms
memory: 3768kb

input:

333368798444245171 30

output:

3.8346128253

result:

ok found '3.8346128', expected '3.8346128', error '0.0000000'

Test #26:

score: 0
Accepted
time: 2ms
memory: 3760kb

input:

959976653971901732 69

output:

1.8170508006

result:

ok found '1.8170508', expected '1.8170508', error '0.0000000'

Test #27:

score: 0
Accepted
time: 2ms
memory: 3692kb

input:

268193483524125987 37

output:

2.9545682655

result:

ok found '2.9545683', expected '2.9545683', error '0.0000000'

Test #28:

score: 0
Accepted
time: 2ms
memory: 3660kb

input:

260425914665370955 71

output:

1.7529919829

result:

ok found '1.7529920', expected '1.7529920', error '0.0000000'

Test #29:

score: 0
Accepted
time: 2ms
memory: 3824kb

input:

897036930760783895 17

output:

11.4040000000

result:

ok found '11.4040000', expected '11.4040000', error '0.0000000'

Test #30:

score: 0
Accepted
time: 2ms
memory: 3676kb

input:

74587017830121569 24

output:

5.0515873016

result:

ok found '5.0515873', expected '5.0515873', error '0.0000000'

Test #31:

score: 0
Accepted
time: 0ms
memory: 3676kb

input:

565676857502199822 83

output:

1.6345079840

result:

ok found '1.6345080', expected '1.6345080', error '0.0000000'

Test #32:

score: 0
Accepted
time: 0ms
memory: 3672kb

input:

834393643531603718 27

output:

4.5955882041

result:

ok found '4.5955882', expected '4.5955882', error '0.0000000'

Test #33:

score: 0
Accepted
time: 2ms
memory: 3772kb

input:

611313338732907397 47

output:

2.3965517241

result:

ok found '2.3965517', expected '2.3965517', error '0.0000000'

Test #34:

score: 0
Accepted
time: 2ms
memory: 3548kb

input:

269019726702209411 91

output:

1.5491351186

result:

ok found '1.5491351', expected '1.5491351', error '0.0000000'

Test #35:

score: 0
Accepted
time: 2ms
memory: 3692kb

input:

779867924639053494 90

output:

1.5757741432

result:

ok found '1.5757741', expected '1.5757741', error '0.0000000'

Test #36:

score: 0
Accepted
time: 2ms
memory: 3736kb

input:

76079933162791087 6

output:

650.9352592713

result:

ok found '650.9352593', expected '650.9352593', error '0.0000000'

Test #37:

score: 0
Accepted
time: 2ms
memory: 3552kb

input:

864836661365745138 48

output:

2.3705488022

result:

ok found '2.3705488', expected '2.3705488', error '0.0000000'

Test #38:

score: 0
Accepted
time: 2ms
memory: 3780kb

input:

319233245336636649 83

output:

1.6225576145

result:

ok found '1.6225576', expected '1.6225576', error '0.0000000'

Test #39:

score: 0
Accepted
time: 2ms
memory: 3680kb

input:

880853945234827955 98

output:

1.5187481483

result:

ok found '1.5187481', expected '1.5187481', error '0.0000000'

Test #40:

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

input:

269845965585325539 86

output:

1.5902139711

result:

ok found '1.5902140', expected '1.5902140', error '0.0000000'

Test #41:

score: 0
Accepted
time: 2ms
memory: 3680kb

input:

299309934612736033 50

output:

2.2471614206

result:

ok found '2.2471614', expected '2.2471614', error '0.0000000'

Test #42:

score: 0
Accepted
time: 2ms
memory: 3604kb

input:

31750903004989766 46

output:

2.2892174420

result:

ok found '2.2892174', expected '2.2892174', error '0.0000000'

Test #43:

score: 0
Accepted
time: 2ms
memory: 3604kb

input:

878458341756144515 26

output:

4.8987502944

result:

ok found '4.8987503', expected '4.8987503', error '0.0000000'

Test #44:

score: 0
Accepted
time: 2ms
memory: 3692kb

input:

72789637466040772 32

output:

3.3778032953

result:

ok found '3.3778033', expected '3.3778033', error '0.0000000'

Test #45:

score: 0
Accepted
time: 1ms
memory: 3660kb

input:

270672213058376259 95

output:

1.5201065141

result:

ok found '1.5201065', expected '1.5201065', error '0.0000000'

Test #46:

score: 0
Accepted
time: 2ms
memory: 3704kb

input:

42123981441194380 57

output:

1.9542194609

result:

ok found '1.9542195', expected '1.9542195', error '0.0000000'

Test #47:

score: 0
Accepted
time: 2ms
memory: 3656kb

input:

423890230884993629 93

output:

1.5416856552

result:

ok found '1.5416857', expected '1.5416857', error '0.0000000'

Test #48:

score: 0
Accepted
time: 2ms
memory: 3664kb

input:

668707985291768083 4

output:

28596.3370297083

result:

ok found '28596.3370297', expected '28596.3370297', error '0.0000000'

Test #49:

score: 0
Accepted
time: 2ms
memory: 3660kb

input:

271498451941492387 52

output:

2.1686492620

result:

ok found '2.1686493', expected '2.1686493', error '0.0000000'

Test #50:

score: 0
Accepted
time: 2ms
memory: 3656kb

input:

561565987119909623 68

output:

1.8187500000

result:

ok found '1.8187500', expected '1.8187500', error '0.0000000'

Test #51:

score: 0
Accepted
time: 2ms
memory: 3656kb

input:

166464870954228340 74

output:

1.7081046562

result:

ok found '1.7081047', expected '1.7081047', error '0.0000000'

Test #52:

score: 0
Accepted
time: 2ms
memory: 3604kb

input:

272324690824608515 48

output:

2.3084215457

result:

ok found '2.3084215', expected '2.3084215', error '0.0000000'

Test #53:

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

input:

81007997093592161 28

output:

4.0188770571

result:

ok found '4.0188771', expected '4.0188771', error '0.0000000'

Test #54:

score: 0
Accepted
time: 0ms
memory: 3680kb

input:

273150934002691939 102

output:

1.5000000000

result:

ok found '1.5000000', expected '1.5000000', error '0.0000000'

Test #55:

score: 0
Accepted
time: 2ms
memory: 3768kb

input:

1000000000000000000 101

output:

1.5001950775

result:

ok found '1.5001951', expected '1.5001951', error '0.0000000'
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