#include<bits/stdc++.h>
using namespace std;

#define REP(i,a,b) for(i=a;i<b;i++)
#define rep(i,n) REP(i,0,n)

#define mygc(c) (c)=getchar_unlocked()
#define mypc(c) putchar_unlocked(c)

#define ll long long
#define ull unsigned ll

void reader(int *x){int k,m=0;*x=0;for(;;){mygc(k);if(k=='-'){m=1;break;}if('0'<=k&&k<='9'){*x=k-'0';break;}}for(;;){mygc(k);if(k<'0'||k>'9')break;*x=(*x)*10+k-'0';}if(m)(*x)=-(*x);}
void reader(ll *x){int k,m=0;*x=0;for(;;){mygc(k);if(k=='-'){m=1;break;}if('0'<=k&&k<='9'){*x=k-'0';break;}}for(;;){mygc(k);if(k<'0'||k>'9')break;*x=(*x)*10+k-'0';}if(m)(*x)=-(*x);}
void reader(double *x){scanf("%lf",x);}
int reader(char c[]){int i,s=0;for(;;){mygc(i);if(i!=' '&&i!='\n'&&i!='\r'&&i!='\t'&&i!=EOF) break;}c[s++]=i;for(;;){mygc(i);if(i==' '||i=='\n'||i=='\r'||i=='\t'||i==EOF) break;c[s++]=i;}c[s]='\0';return s;}
template <class T, class S> void reader(T *x, S *y){reader(x);reader(y);}
template <class T, class S, class U> void reader(T *x, S *y, U *z){reader(x);reader(y);reader(z);}
template <class T, class S, class U, class V> void reader(T *x, S *y, U *z, V *w){reader(x);reader(y);reader(z);reader(w);}

void writer(int x, char c){int s=0,m=0;char f[10];if(x<0)m=1,x=-x;while(x)f[s++]=x%10,x/=10;if(!s)f[s++]=0;if(m)mypc('-');while(s--)mypc(f[s]+'0');mypc(c);}
void writer(ll x, char c){int s=0,m=0;char f[20];if(x<0)m=1,x=-x;while(x)f[s++]=x%10,x/=10;if(!s)f[s++]=0;if(m)mypc('-');while(s--)mypc(f[s]+'0');mypc(c);}
void writer(double x, char c){printf("%.15f",x);mypc(c);}
void writer(const char c[]){int i;for(i=0;c[i]!='\0';i++)mypc(c[i]);}
void writer(const char x[], char c){int i;for(i=0;x[i]!='\0';i++)mypc(x[i]);mypc(c);}
template<class T> void writerLn(T x){writer(x,'\n');}
template<class T, class S> void writerLn(T x, S y){writer(x,' ');writer(y,'\n');}
template<class T, class S, class U> void writerLn(T x, S y, U z){writer(x,' ');writer(y,' ');writer(z,'\n');}
template<class T> void writerArr(T x[], int n){int i;if(!n){mypc('\n');return;}rep(i,n-1)writer(x[i],' ');writer(x[n-1],'\n');}

char memarr[17000000]; void *mem = memarr;
#define MD 1000000007

int N;
int A; double P[3];
double dp[21][100000];
int bc[100000];

int red[100000];

int main(){
  int i, j, k, x, mask, nx, r;
  double res = 0, p;

  REP(i,1,1<<14) bc[i] = bc[i&(i-1)]+1;

  reader(&A,P,P+1,P+2);
  rep(i,3) P[i] /= 100;
  N = 80 - A;

  rep(i,1<<14){
    red[i] = i;
    REP(j,1,14) if(!(i&1<<j) && !(i&1<<(j-1))){
      red[i] = 0;
      rep(k,j) if(i&1<<k) red[i] |= 1<<k;
      REP(k,j,14) if(i&1<<k) red[i] |= 1<<(k-1);
    }
    if(red[i] != i) continue;
  }

  dp[0][(1<<14)-1] = 1;
  rep(k,N){
    rep(i,1<<14){
      j = i;
      while(j != red[j]) j = red[j];
      if(i==j) continue;
      dp[k][j] += dp[k][i];
      dp[k][i] = 0;
    }
    rep(i,1<<14) if(dp[k][i]>1e-20) for(j=i;;j=(j-1)&i){
      p = 1;
      rep(x,14) if(i&1<<x){
        r = 0;
        if(x!=0 && i&1<<(x-1)) r++;
        if(i&1<<(x+1)) r++;
        if(j&1<<x) p *= 1-P[r]; else p *= P[r];
      }
      dp[k+1][j] += dp[k][i] * p;
      if(j==0) break;
    }
  }

  rep(i,1<<14) res += 2 * bc[i] * dp[N][i];
  writerLn(res);

  return 0;
}