operand = input().split()
stack = []
for op in operand:
    if op.isdigit():
        stack.append(op)
    else:
        val1 = stack.pop()
        val2 = stack.pop()
        stack.append(str(eval("("+val2+")" + op + "("+val1+")")))
print (stack[0]) operand = input().split() operand input().split() ().split () input split stack = [] stack [] for op in operand:
    if op.isdigit():
        stack.append(op)
    else:
        val1 = stack.pop()
        val2 = stack.pop()
        stack.append(str(eval("("+val2+")" + op + "("+val1+")"))) op operand if op.isdigit():
        stack.append(op)
    else:
        val1 = stack.pop()
        val2 = stack.pop()
        stack.append(str(eval("("+val2+")" + op + "("+val1+")"))) op.isdigit() op.isdigit op isdigit stack.append(op) stack.append stack append op val1 = stack.pop() val1 stack.pop() stack.pop stack pop val2 = stack.pop() val2 stack.pop() stack.pop stack pop stack.append(str(eval("("+val2+")" + op + "("+val1+")"))) stack.append stack append str(eval("("+val2+")" + op + "("+val1+")")) str eval("("+val2+")" + op + "("+val1+")") eval "("+val2+")" + op + "("+val1+")" "("+val2+")" + op + "("+val1 "("+val2+")" + op + "(" "("+val2+")" + op "("+val2+")" "("+val2 "(" val2 ")" op "(" val1 ")" print (stack[0]) print stack[0] stack 0 stack = [] [] stack operand = input().split() input().split() operand val2 = stack.pop() stack.pop() val2 val1 = stack.pop() stack.pop() val1
operand = input().split()
stack = []
for op in operand:
    if op.isdigit():
        stack.append(op)
    else:
        val1 = stack.pop()
        val2 = stack.pop()
        stack.append(str(eval("("+val2+")" + op + "("+val1+")")))
print (stack[0])