#include<stdio.h>
#include <stdlib.h>
#include<string.h>

int top, S[1000];

	void push(int x) {
		S[++top] = x;
	}
	int pop() {
		top--;
		return S[top + 1];
	}

int main() {
	char s[100];
	int a, b;
	top = 0;

	while (s[0] = getchar() != EOF) {
		if (s[0] == '+') {
			a = pop();
			b = pop();
			push(a + b);
		}
		else 	if (s[0] == '-') {
			a = pop();
			b = pop();
			push(a - b);
		}
		else 	if (s[0] == '*') {
			a = pop();
			b = pop();
			push(a * b);
		}
		else {
			push(atoi(s));
		}

		printf("%d\n", pop());
	}

	return 0;
}