Codeforces Round 252 (Div. 2)
E
Valera and Number
Codeforces
2400
原题
← D→
翻译中…

Valera is a coder. Recently he wrote a funny program. The pseudo code for this program is given below:

翻译中…

//input: integers x, k, p
a = x;
for(step = 1; step <= k; step = step + 1){
    rnd = [random integer from 1 to 100];
    if(rnd <= p)
        a = a * 2;
    else
        a = a + 1;
}

s = 0;

while(remainder after dividing a by 2 equals 0){
    a = a / 2;
    s = s + 1;
}

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Now Valera wonders: given the values $*x*$, $*k*$ and $*p*$, what is the expected value of the resulting number $*s*$?

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Input

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The first line of the input contains three integers $*x*, *k*, *p*$ ($1 ≤ *x* ≤ 10^{9}; 1 ≤ *k* ≤ 200; 0 ≤ *p* ≤ 100$).

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Output

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Print the required expected value. Your answer will be considered correct if the absolute or relative error doesn't exceed $10^{ - 6}$.

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Note

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If the concept of expected value is new to you, you can read about it by the link:

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样例

Input #1
1 1 50
Output #1
1.0000000000000
InputCopy OutputCopy
Input #2
5 3 0
Output #2
3.0000000000000
InputCopy OutputCopy
Input #3
5 3 25
Output #3
1.9218750000000
InputCopy OutputCopy
题目信息
题号
441E
时间限制
2 s
内存限制
256 MB
标签
位运算
动态规划
数学
概率论

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