oj.uz

답안 #15177

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
15177 2015-07-12T03:21:19 Z ainta 맛있는 과자 (kriii3_A) C++
33 / 33
 0 ms 1204 KB 
#include<stdio.h>
#include<algorithm>
#include<math.h>
using namespace std;
long long K, C[41][41], S;
int a, b, n;
double Res;
int main()
{
    int i, j, x;
    scanf("%d%d%d%lld",&a,&b,&n,&K);
    if(a<b)swap(a,b);
    for(i=0;i<=n;i++){
        C[i][0]=1;
        for(j=1;j<=i;j++)C[i][j]=C[i-1][j-1]+C[i-1][j];
    }
    for(i=0;i<=n;i++){
        S+=C[n][i];
        if(S>=K)break;
    }
    x = i;
    Res=a*b*0.5;
    Res = log(Res);
    for(i=1;i<=x;i++){
        Res=Res+log(b*b)-log(a*a+b*b);
    }
    for(i=1;i<=n-x;i++){
        Res=Res+log(a*a)-log(a*a+b*b);
    }
    printf("%.11lf\n",Res);
}

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