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
#213363	#2053. 地雷爆炸	xuewentao	100	3ms	1300kb	C++	594b	2024-11-11 20:10:56	2024-11-11 23:03:28

answer

#include<bits/stdc++.h>

using namespace std;

const int maxn = 310;

int n, m;

double p[maxn];
double ans[maxn];

double pownm(double x, int k) {
	double res = 1;
	while (k) {
		if (k & 1) res = res * x;
		x = x * x;
		k >>= 1;
	}
	return res;
}

int main() {
	cin >> n >> m;
	for (int i = 0; i < n; i++) cin >> p[i];
	
	ans[0] = 0;
	for (int i = 1; i <= m; i++) {
		for (int j = 0; j < n; j++) {
			ans[i] += p[j] * pownm(ans[i-1], j);
		}
	}
	printf("%.4f\n", ans[m]);
}

/*

6 3

0.00447010 0.64182590 0.34123410 0.01028470 0.00118920 0.00099600

*/

源文件, 语言: C++

详细

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Test #1:

score: 10

Accepted

time: 0ms

memory: 1296kb

input:

300 20
0.00379430 0.00378180 0.00857190 0.00919620 0.00396670 0.00176760 0.00511380 0.00793840 0.005...

output:

0.0038

result:

ok single line: '0.0038'

Test #2:

score: 10

Accepted

time: 1ms

memory: 1300kb

input:

300 69
0.03642550 0.00870610 0.00174390 0.00728740 0.00917590 0.00276320 0.00788090 0.00688300 0.000...

output:

0.0367

result:

ok single line: '0.0367'

Test #3:

score: 10

Accepted

time: 0ms

memory: 1300kb

input:

300 1
0.02275200 0.00255280 0.00714900 0.00673530 0.00625580 0.00952860 0.00503680 0.00361520 0.0085...

output:

0.0228

result:

ok single line: '0.0228'

Test #4:

score: 10

Accepted

time: 0ms

memory: 1296kb

input:

300 34
0.01174930 0.00237960 0.00725200 0.00622610 0.00092020 0.00915390 0.00050940 0.00135760 0.006...

output:

0.0118

result:

ok single line: '0.0118'

Test #5:

score: 10

Accepted

time: 0ms

memory: 1300kb

input:

300 180
0.03276550 0.00945640 0.00095320 0.00353310 0.00647080 0.00637530 0.00059110 0.00265000 0.00...

output:

0.0331

result:

ok single line: '0.0331'

Test #6:

score: 10

Accepted

time: 1ms

memory: 1300kb

input:

300 78
0.07426740 0.00030970 0.00922200 0.00879440 0.00434000 0.00690410 0.00787240 0.00838550 0.005...

output:

0.0743

result:

ok single line: '0.0743'

Test #7:

score: 10

Accepted

time: 0ms

memory: 1300kb

input:

300 21
0.03122890 0.00933980 0.00300750 0.00424390 0.00213370 0.00940520 0.00636220 0.00227220 0.007...

output:

0.0315

result:

ok single line: '0.0315'

Test #8:

score: 10

Accepted

time: 1ms

memory: 1300kb

input:

6 4
0.64261410 0.35418080 0.00144510 0.00171790 0.00002830 0.00001380

output:

0.9831

result:

ok single line: '0.9831'

Test #9:

score: 10

Accepted

time: 0ms

memory: 1296kb

input:

6 1
0.23944990 0.51892380 0.07985400 0.07066520 0.03907530 0.05203180

output:

0.2394

result:

ok single line: '0.2394'

Test #10:

score: 10

Accepted

time: 0ms

memory: 1296kb

input:

6 3
1 0 0 0 0 0

output:

1.0000

result:

ok single line: '1.0000'