func_code_string: #include <bits/stdc++.h>   using namespace std;   int num1 = 0;   string s1, s2;   int counter = 0;   int ques = 0;   int main() {     cin >> s1 >> s2;     int num2 = 0;     for (int i = 0; i < s1.length(); i++)       if (s1[i] ==  + )         num1++;       else         num1--;     for (int i = 0; i < s2.length(); i++)       if (s2[i] ==  + )         num2++;       else if (s2[i] ==  - )         num2--;       else         ques++;     float num = 0;     int limit = (1 << ques);     for (int i = 0; i < limit; i++) {       int sum = num2;       for (int j = 0; j < ques; j++) {         if ((1 << j) & i)           sum++;         else           sum--;       }       if (sum == num1) counter++;     }     if (ques != 0) {       num = (float)counter / (1 << ques);     } else if (num2 == num1)       num = 1;     printf( %0.12f n , num);   }   