oj.uz

답안 #15836

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
15836 2015-07-30T11:58:17 Z ggoh 맛있는 과자 (kriii3_A) C++
33 / 33
 0 ms 1204 KB 
#include<cstdio>
#include<algorithm>
#include<vector>
#include<cmath>
long long s,a,b,n,k,i,j,D[44][44];
long long C(long long N,long long R)
{
    if(D[N][R])return D[N][R];
    if(R==0||R==N)return D[N][R]=1;
    if(R==1)return D[N][R]=N;
    return D[N][R]=C(N-1,R)+C(N-1,R-1);
}
main()
{
    scanf("%lld%lld%lld%lld",&a,&b,&n,&k);
    i=0;
    while(s<k)
    {
        s+=C(n,i);
        i++;
    }
    k=n-i+1;
    if(a>b)j=a,a=b,b=j;
    double sq=(double)(a*b)/(double)2;
    for(j=1;j<=k;j++)
    {
        sq*=(double)(b*b)/(double)(a*a+b*b);
    }
    for(j=1;j<=n-k;j++)
    {
        sq*=(double)(a*a)/(double)(a*a+b*b);
    }
    printf("%.10lf",log(sq));
}

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