#include <stdio.h>
#include<stdlib.h>
#include <string.h>
#include <assert.h>
#define STACK_SIZE 10000

struct stack{
    float values[STACK_SIZE];
    int size;
};
struct stack mystack;

void push_stack(struct stack* stack, float value){
assert(stack->size < STACK_SIZE); 
stack->values[stack->size] = value;
stack->size += 1;
}
float pop_stack(struct stack* stack){
  assert(stack->size > 0);
float value = stack->values[stack->size-1];
stack->size -= 1;
return value;
}
void print_stack(struct stack* stack){
    for(int i = 0; i < stack->size; i++)
        printf("%g ", stack->values[i]);
    printf("\n");
}
  
void process_operations(struct stack* stack){
    char line[STACK_SIZE];
    if(!fgets(line, STACK_SIZE, stdin)){
        printf("Chyba\n");
        return;
    }
    for(int i = 0; line[i] != '\0'; i++){
        if(line[i] >= '0' && line[i] <= '9'){
            char *endptr;
            float val = strtof(&line[i], &endptr);
            push_stack(stack, val);
             print_stack(stack);
            i = endptr - line - 1;
        }
        else if ((line[i] == '*' || line[i] == '+' || line[i] == '-' || line[i] == '/') 
                  && stack->size >= 2){
            float b = pop_stack(stack);
            float a = pop_stack(stack);
            float res = (line[i] == '+') ? a + b :
                        (line[i] == '-') ? a - b :
                        (line[i] == '*') ? a * b :
                        (line[i] == '/') ? a / b : 0;
            push_stack(stack, res);
             print_stack(stack);
        }
    }
}
int main(void){
    memset(&mystack,0,sizeof(struct stack));
    process_operations(&mystack);
}