#include <bits/stdc++.h>
using namespace std;
int n, k, p;
int read() {
  int s = 0, f = 1;
  char ch = getchar();
  while (ch < '0' || ch > '9') {
    if (ch == '-') f = -1;
    ch = getchar();
  }
  while (ch >= '0' && ch <= '9') {
    s = s * 10 + ch - '0';
    ch = getchar();
  }
  return s * f;
}
double dp[500][500];
int main() {
  n = read(), k = read(), p = read();
  double p1 = 1.0 * p / 100, p2 = 1.0 - p1;
  for (int i = 0; i <= k; ++i) {
    for (int j = n + i; (j & 1) == 0; j >>= 1) {
      dp[0][i] += 1.0;
    }
  }
  for (int i = 0; i < k; ++i) {
    for (int j = 0; j <= k; ++j) {
      if (j != 0) dp[i + 1][j - 1] += p2 * dp[i][j];
      if (j * 2 <= k) dp[i + 1][j * 2] += p1 * (dp[i][j] + 1);
    }
  }
  printf("%.10lf", dp[k][0]);
}
