NOI.AC

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
#199288	#2807. 小明的涂色	snow_trace	100	170ms	1376kb	C++11	465b	2023-12-09 11:06:25	2023-12-09 12:09:36

answer

#include<bits/stdc++.h>
using namespace std;
#define lowbit(x) x&(-x)
#define endl '\n'
long long n,m,k;
signed main(){
	cin>>k>>n>>m;long double ans = 0;
	long long tot= n*m*n*m;
	for(long long i = 1;i<=n;i++){
		for(long long j = 1;j<=m;j++){
			long long sum = 0;sum = (i*j)*(n-i+1)*(m-j+1)*4-2*i*(n-i+1)-2*j*(m-j+1)+1;
		//	cout<<sum<<" "<<tot<<endl;
			ans+=1-pow(1-1.0*sum/tot,k);
		}
	}cout<<fixed<<setprecision(2)<< ans << endl;
	return 0;
}

源文件, 语言: C++11

详细

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Test #1:

score: 10

Accepted

time: 1ms

memory: 1264kb

input:

1 2 2

output:

2.25

result:

ok single line: '2.25'

Test #2:

score: 10

Accepted

time: 0ms

memory: 1272kb

input:

1 20 20

output:

58.52

result:

ok single line: '58.52'

Test #3:

score: 10

Accepted

time: 0ms

memory: 1268kb

input:

1 19 16

output:

46.18

result:

ok single line: '46.18'

Test #4:

score: 10

Accepted

time: 5ms

memory: 1324kb

input:

100 59 990

output:

55484.94

result:

ok single line: '55484.94'

Test #5:

score: 10

Accepted

time: 11ms

memory: 1368kb

input:

32 407 341

output:

116240.55

result:

ok single line: '116240.55'

Test #6:

score: 10

Accepted

time: 32ms

memory: 1368kb

input:

22 746 624

output:

361402.19

result:

ok single line: '361402.19'

Test #7:

score: 10

Accepted

time: 32ms

memory: 1328kb

input:

74 481 873

output:

385866.87

result:

ok single line: '385866.87'

Test #8:

score: 10

Accepted

time: 0ms

memory: 1372kb

input:

50 164 158

output:

23216.24

result:

ok single line: '23216.24'

Test #9:

score: 10

Accepted

time: 15ms

memory: 1324kb

input:

77 412 452

output:

171908.35

result:

ok single line: '171908.35'

Test #10:

score: 10

Accepted

time: 74ms

memory: 1376kb

input:

100 1000 1000

output:

936523.83

result:

ok single line: '936523.83'