def solveExp(index,str_):
if(index>=len(str_)):
return 0
if(str_[index]=='+'):
return 1 + solveExp(index+1,str_)
else:
return -1+ solveExp(index+1,str_)
def solveMain(index,str_,target,ans,res,leng):
if(index>=len(str_)):
leng.append(True)
if(ans==target):
res.append(True)
return 0
if(str_[index]=='+'):
solveMain(index+1,str_,target,ans+1,res,leng)
elif(str_[index]=='-'):
solveMain(index+1,str_,target,ans-1,res,leng)
else:
solveMain(index+1,str_,target,ans+1,res,leng)
solveMain(index+1,str_,target,ans-1,res,leng)
s1=str(input())
s2=str(input())
k1 = solveExp(0,s1)
k2 = []
leng=[]
solveMain(0,s2,k1,0,k2,leng)
if('?' in s2):
op=format(len(k2)/len(leng), '.12f')
print(op)
else:
print(len(k2))
#include<bits/stdc++.h>
using namespace std;
int main()
{
ios::sync_with_stdio(false);
cin.tie(0);
string s1,s2;
cin>>s1>>s2;
int ps1 = 0;
int ps2 = 0;
int empty = 0;
for(int i=0; i<s1.size(); i++)
{
if(s1[i] == '+')
{
ps1++;
}
if(s2[i] == '+')
{
ps2++;
}
if(s2[i] == '?')
{
empty++;
}
}
int counter = 0;
//cout<<"Empty = "<<empty<<" "<<"LEn = "<<(1<<empty)<<"\n";
for(int i=0; i< (1<<empty); i++)
{
//cout<<bitset<32>(i)<<"\n";
//cout<<__builtin_popcount(i) <<" "<<ps2<<" "<<ps1<<"\n";
if(__builtin_popcount(i) + ps2 == ps1)
{
counter++;
}
}
cout<<fixed<<setprecision(9)<<(double)counter/(1<<empty)<<endl;
return 0;
}63A - Sinking Ship | 1704B - Luke is a Foodie |
298B - Sail | 239A - Two Bags of Potatoes |
1704E - Count Seconds | 682A - Alyona and Numbers |
44A - Indian Summer | 1133C - Balanced Team |
1704A - Two 0-1 Sequences | 1467A - Wizard of Orz |
1714E - Add Modulo 10 | 1714A - Everyone Loves to Sleep |
764A - Taymyr is calling you | 1714B - Remove Prefix |
1264F - Beautiful Fibonacci Problem | 52A - 123-sequence |
1543A - Exciting Bets | 1714D - Color with Occurrences |
215B - Olympic Medal | 1445A - Array Rearrangment |
1351A - A+B (Trial Problem) | 935B - Fafa and the Gates |
1291A - Even But Not Even | 1269A - Equation |
441A - Valera and Antique Items | 1702C - Train and Queries |
816B - Karen and Coffee | 838D - Airplane Arrangements |
148B - Escape | 847G - University Classes |