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| #include <bits/stdc++.h>
#define rep(i, b) for(int i = 0; i < b; i++)
using namespace std;
int calc(int x, char c, int y){
if( c == '-'){
if(y == 0) return 2;
else if(y == 1) return 1;
else return 0;
}
if(c == '+'){
if(x == 0) return y;
else if(x == 1){
if(y == 0) return x;
else return y;
}
else if(x == 2) return x;
}
if(c == '*'){
if(x == 0 || y == 0) return 0;
else if(x == 1 || y == 1) return 1;
else return 2;
}
}
int main(){
string str;
while(cin >> str, str != "."){
rep(i,str.size()){
if(str[i] == '-' && str[i+1] == '-'){
i = str.erase(str.begin() + i, str.begin() + i + 2) - str.begin();
}
}
int cnt = 0;
rep(p,3) rep(q,3) rep(r,3){
string tmp = str;
bool flag = true;
while(1){
int x = -1, y = -1;
char c;
int i = 0;
while(tmp[i++] != ')'){
if(i >= tmp.size()){
flag = false;
break;
}
}
if(!flag)break;
i--;
tmp.erase(tmp.begin() + i, tmp.begin() + i + 1);
int j = i;
char command;
while(tmp[j] != '('){
if(tmp[j] >= '0' && tmp[j] <= '2'){
if(y == -1) y = tmp[j] - '0';
else x = tmp[j] - '0';
}
else if(tmp[j] == 'P'){
if(y == -1) y = p;
else x = p;
tmp[j] = p + '0';
}
else if(tmp[j] == 'Q'){
if(y == -1) y = q;
else x = q;
tmp[j] = q + '0';
}
else if(tmp[j] == 'R'){
if(y == -1) y = r;
else x = r;
tmp[j] = r + '0';
}
else if(tmp[j] == '-') {
char t = calc(0,'-',tmp[j+1]-'0') + '0';
tmp.replace(tmp.begin() + j, tmp.begin() + j + 2, 1, t);
if(x != -1) x = t - '0';
else y = t - '0';
}
else if(tmp[j] == '+' || tmp[j] == '*') command = tmp[j];
j--;
}
tmp.erase(tmp.begin() + j,tmp.begin() + j + 1);
char t = calc(x,command,y) + '0';
tmp.replace(tmp.begin() + j, tmp.begin() + j + 3, 1, t);
}
int y = -1;
if( tmp[0] < '0' || tmp[0] > '2'){
if(tmp[tmp.size()-1] == 'P') tmp[tmp.size()-1] = p + '0';
else if(tmp[tmp.size()-1] == 'Q') tmp[tmp.size()-1] = q + '0';
else if(tmp[tmp.size()-1] == 'R') tmp[tmp.size()-1] = r + '0';
if(tmp[0] == '-'){
char t = calc(0,'-',tmp[1]-'0') + '0';
tmp.replace(tmp.begin(), tmp.begin() + 2, 1, t);
}
}
if(tmp == "2") cnt++;
}
cout << cnt << endl;
}
return 0;
}
|