#include #include using namespace std;int arr[26];int trans(char input){ return arr[input - 'A' ];}double cal(double a, double b, char oper){ switch (oper) { case '+': return a + b; break; case '-': return a - b; break; case '*': return a * b; break; case '/': return a / b; break; }}int main(){ int N; cin >> N; string input; cin >> input; stack s; for (int i = 0; i > tmp; arr[i] = tm..
