oj.uz

답안 #15402

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
15402 2015-07-12T07:09:54 Z skeksk91 맛있는 과자 (kriii3_A) C++
33 / 33
 0 ms 1204 KB 
#include<stdio.h>
#include<algorithm>
#include<math.h>
long long pascal[41][41];

long long pow(long long n, long long k) {
	if (k == 0) {
		return 1;
	}
	long long temp = pow(n, k / 2);
	if (k % 2 == 0) {
		return temp*temp;
	}
	return temp*temp*n;
}


int main() {
	for (int i = 0; i <= 40; i++) {
		for (int j = 0; j <= i; j++) {
			if (j == 0 || j == i) {
				pascal[i][j] = 1;
			}
			else {
				pascal[i][j] = pascal[i - 1][j] + pascal[i - 1][j - 1];
			}
		}
	}
	long long a, b, n, k;
	scanf("%lld%lld%lld%lld", &a, &b, &n, &k);
	if (a < b) {
		std::swap(a, b);
	}
	long long l = pow(2, n);
	double s = (double)a*b/2;

	for (int i = 0; i <= n; i++) {
		k -= pascal[n][i];
		if (k <= 0) {
			for (int j = 1; j <= i; j++) {
				s = s*b*b / ((a*a) + (b*b));
			}
			for (int j = 1; j <= n-i; j++) {
				s = s*a*a / ((a*a) + (b*b));
			}
			break;
		}
	}
	printf("%.12lf", log(s));

}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 1204 KB Output is correct
2 Correct 0 ms 1204 KB Output is correct
3 Correct 0 ms 1204 KB Output is correct
4 Correct 0 ms 1204 KB Output is correct
5 Correct 0 ms 1204 KB Output is correct
6 Correct 0 ms 1204 KB Output is correct
7 Correct 0 ms 1204 KB Output is correct
8 Correct 0 ms 1204 KB Output is correct
9 Correct 0 ms 1204 KB Output is correct
10 Correct 0 ms 1204 KB Output is correct
11 Correct 0 ms 1204 KB Output is correct
12 Correct 0 ms 1204 KB Output is correct
13 Correct 0 ms 1204 KB Output is correct
14 Correct 0 ms 1204 KB Output is correct
15 Correct 0 ms 1204 KB Output is correct
16 Correct 0 ms 1204 KB Output is correct
17 Correct 0 ms 1204 KB Output is correct
18 Correct 0 ms 1204 KB Output is correct
19 Correct 0 ms 1204 KB Output is correct
20 Correct 0 ms 1204 KB Output is correct
21 Correct 0 ms 1204 KB Output is correct
22 Correct 0 ms 1204 KB Output is correct
23 Correct 0 ms 1204 KB Output is correct
24 Correct 0 ms 1204 KB Output is correct
25 Correct 0 ms 1204 KB Output is correct

Subtask #2
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 1204 KB Output is correct
2 Correct 0 ms 1204 KB Output is correct
3 Correct 0 ms 1204 KB Output is correct
4 Correct 0 ms 1204 KB Output is correct
5 Correct 0 ms 1204 KB Output is correct
6 Correct 0 ms 1204 KB Output is correct
7 Correct 0 ms 1204 KB Output is correct
8 Correct 0 ms 1204 KB Output is correct
9 Correct 0 ms 1204 KB Output is correct
10 Correct 0 ms 1204 KB Output is correct
11 Correct 0 ms 1204 KB Output is correct
12 Correct 0 ms 1204 KB Output is correct
13 Correct 0 ms 1204 KB Output is correct
14 Correct 0 ms 1204 KB Output is correct
15 Correct 0 ms 1204 KB Output is correct
16 Correct 0 ms 1204 KB Output is correct
17 Correct 0 ms 1204 KB Output is correct
18 Correct 0 ms 1204 KB Output is correct
19 Correct 0 ms 1204 KB Output is correct
20 Correct 0 ms 1204 KB Output is correct
21 Correct 0 ms 1204 KB Output is correct
22 Correct 0 ms 1204 KB Output is correct
23 Correct 0 ms 1204 KB Output is correct
24 Correct 0 ms 1204 KB Output is correct
25 Correct 0 ms 1204 KB Output is correct