Function main

Codeforces_problems/Dreamoon and WIFI/solution.cpp:31–63

	return result;
}
int main() {
	string str1, str2;
	cin >> str1 >> str2;
	int count1Plus = count(str1.begin(), str1.end(), '+');
	int count1Minus = count(str1.begin(), str1.end(), '-');
	int count2Plus = count(str2.begin(), str2.end(), '+');
	int count2Minus = count(str2.begin(), str2.end(), '-');
	int count2Mark = str2.length() - (count2Plus + count2Minus);
	if (!count2Mark) {
		if (count2Plus == count1Plus && count2Minus == count1Minus) {
			cout << "1.000000000000";
			return 0;
		}
		else {
			cout << "0.000000000000";
			return 0;
		}
	}
	int diffPlus = count1Plus - count2Plus;
	int diffMinus = count1Minus - count2Minus;
	if (diffPlus + diffMinus == count2Mark && diffPlus >= 0 && diffMinus >=0) {
		long long int res = factorial(count2Mark);
		long long int res1 = factorial(diffPlus);
		long long int res2 = factorial(diffMinus);
		double result = (double)res /(double) (res1 * res2);
		long long int totalWays = pow(2, count2Mark);
		cout << fixed;
		cout << setprecision(12);
		cout << result / (double)totalWays;
	}
	else cout << "0.000000000000";
	return 0;
}