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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
#213394#2053. 地雷爆炸one_zero_four_zero1001ms1256kbC++11667b2024-11-11 21:23:562024-11-11 23:06:57

answer

#include<bits/stdc++.h>
#pragma GCC optimize(2)
using namespace std;

int N, M;
double P[10004];
double dp[305];

double qpow(double a, int b){
	double res = 1.0;
	while (b){
		if (b & 1) res *= a;
		a *= a;
		b >>= 1;
	}
	return res;
}

int main(){
#ifndef ONLINE_JUDGE
	freopen("../data.in", "r", stdin);
	freopen("../data.out", "w", stdout);
#endif

	scanf("%d %d", &N, &M);
	for (int i = 0; i < N; i ++){
		scanf("%lf", &P[i]);
	}
	for (int i = 1; i <= M; i ++){
		for (int j = 0; j < N; j ++){
			dp[i] += P[j] * qpow(dp[i - 1], j);
		}
		// cout << i << " " << dp[i] << ";;\n";
	}
	printf("%.4lf\n", dp[M]);
	
	return 0;
}

详细

小提示:点击横条可展开更详细的信息

Test #1:

score: 10
Accepted
time: 0ms
memory: 1252kb

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: 1252kb

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: 1256kb

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: 1252kb

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: 1252kb

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: 0ms
memory: 1252kb

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: 1256kb

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: 0ms
memory: 1248kb

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: 1252kb

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: 1256kb

input:

6 3
1 0 0 0 0 0

output:

1.0000

result:

ok single line: '1.0000'