/**
 *    author:  otera    
**/
#include<iostream>
#include<string> 
#include<cstdio>
#include<cstring>
#include<vector>
#include<cmath>
#include<algorithm> 
#include<functional>
#include<iomanip>
#include<queue>
#include<deque>
#include<ciso646>
#include<random>
#include<map>
#include<set>
#include<complex>
#include<bitset>
#include<stack>
#include<unordered_map>
#include<unordered_set>
#include<utility>
#include<cassert>
#include <cctype>
using namespace std;
typedef long double ld;

typedef string::const_iterator State;
class ParseError {};

ld p, q, r; 
string s;

ld expr(State &begin);
ld term(State &begin);
ld factor(State &begin);

ld expr(State &begin) {
    ld r1 = term(begin);
    while(begin != s.end() and *begin == 'o') {
        begin += 2;
        ld r2 = factor(begin);
        ld y = 1 - (1 - r1) * (1 - r2);
        r1 = (1 - r) * y + r * (1 - y);
    }
    return r1;
}

ld term(State &begin) {
    ld r1 = factor(begin);
    while(begin != s.end() and *begin == 'a') {
        begin += 3;
        ld r2 = factor(begin);
        ld y = r1 * r2;
        r1 = (1 - r) * y + r * (1 - y);
    }
    return r1;
}

ld factor(State &begin) {
    if(*begin == 'Y') {
        begin += 3;
        return 1.0;
    } 
    if(*begin == 'N') {
        begin += 2;
        return 0.0;
    }
    if(*begin == '(') {
        ++ begin;
        ld ret = expr(begin);
        ++ begin;
        return ret;
    } 
    if(*begin == 'r') {
        begin += 7;
        ld r1 = expr(begin);
        ld r2 = expr(begin);
        ld t = r1 * r2;
        return t * p + (1 - t) * q;
        ++ begin;
    } 
    assert(0);
}

int main() {
    int n;
    cin >> p >> q >> r;
    getline(cin, s);
    State begin = s.begin();
    ld ret = expr(begin);
    cout << ceil(100 * ret) << endl;
}