diff --git a/cv3/program.c b/cv3/program.c
index e69de29..53de6da 100644
--- a/cv3/program.c
+++ b/cv3/program.c
@@ -0,0 +1,65 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <ctype.h>
+
+#define STACK_SIZE 100
+
+struct stack{
+    float values[STACK_SIZE];
+    int size;
+};
+
+int main(){
+    struct stack mystack;
+    memset(&mystack,0,sizeof(struct stack));
+    char vstup[STACK_SIZE];
+    int counter = 0;
+    while(1){
+        fgets(vstup, STACK_SIZE, stdin);
+        if(vstup[0] == '-' || vstup[0] == '+' || vstup[0] == '*' || vstup[0] == '/'){
+            if(vstup[0] == '-'){
+                mystack.values[0] = mystack.values[0] - mystack.values[1];
+                for(int i = 1; mystack.values[i] != 0;i++){
+                    mystack.values[i] = mystack.values[i+1];
+                    mystack.values[i+1] = 0;
+                    counter--;
+                }
+            }
+                if(vstup[0] == '/'){
+                mystack.values[0] = mystack.values[0] / mystack.values[1];
+                for(int i = 1; mystack.values[i] != 0;i++){
+                    mystack.values[i] = mystack.values[i+1];
+                    mystack.values[i+1] = 0;
+                    counter--;
+                }
+            }
+                if(vstup[0] == '*'){
+                mystack.values[0] = mystack.values[0] * mystack.values[1];
+                for(int i = 1; mystack.values[i] != 0;i++){
+                    mystack.values[i] = mystack.values[i+1];
+                    mystack.values[i+1] = 0;
+                    counter--;
+                }
+            }
+                if(vstup[0] == '+'){
+                mystack.values[0] = mystack.values[0] + mystack.values[1];
+                for(int i = 1; mystack.values[i] != 0;i++){
+                    mystack.values[i] = mystack.values[i+1];
+                    mystack.values[i+1] = 0;
+                    counter--;
+                }
+                }
+            }
+        else{
+            float cislo = strtof(vstup, NULL);
+            mystack.values[counter] = cislo;
+            counter++;
+            
+        }
+        mystack.size = counter;
+        for(int i =0; mystack.values[i] != 0;i++){
+            printf("%.2f ", mystack.values[i]);
+        }
+    }
+}
\ No newline at end of file