diff --git a/cv3/program.c b/cv3/program.c
index e69de29..469e7fa 100644
--- a/cv3/program.c
+++ b/cv3/program.c
@@ -0,0 +1,106 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#define STACK_SIZE 10
+struct stack_glavny {
+    float data[STACK_SIZE];
+    int size;
+};
+
+
+void initialize(struct stack_glavny* stack) {
+    stack->size = -1;
+}
+
+
+int push(struct stack_glavny* stack, float value) {
+    if (stack->size < STACK_SIZE - 1) {
+        stack->size++;
+        stack->data[stack->size] = value;
+        return true;
+    } else {
+        return false;
+    }
+}
+
+
+int pop(struct stack_glavny* stack, float* result) {
+    if (stack->size >= 0) {
+        *result = stack->data[stack->size];
+        stack->size--;
+        return true;
+    } else {
+        return false;
+    }
+}
+
+
+int operation_insert_result(struct stack_glavny* stack, char operation) {
+    float operand1, operand2, result;
+    if (pop(stack, &operand2) && pop(stack, &operand1)) {
+        switch (operation) {
+            case '+':
+                result = operand1 + operand2;
+                break;
+            case '-':
+                result = operand1 - operand2;
+                break;
+            case '*':
+                result = operand1 * operand2;
+                break;
+            case '/':
+                if (operand2 == 0) {
+                    printf("Chyba: Delenie nulou.\n");
+                    return false;
+                }
+                result = operand1 / operand2;
+                break;
+            default:
+                printf("Chyba: Neplatná operácia.\n");
+                return false;
+        }
+        if (!push(stack, result)) {
+            printf("Chyba: Zásobník je plný.\n");
+            return false;
+        }
+        return true;
+    } else {
+        printf("Chyba: Nedostatok operandov pre operáciu.\n");
+        return false;
+    }
+}
+
+int main() {
+    struct stack_glavny stack;
+    initialize(&stack);
+
+    char input[20];
+    
+    while (1) {
+        if (!fgets(input, sizeof(input), stdin)) {
+            printf("Chyba pri citani vstupu.\n");
+            break;
+        }
+    
+    float value;
+        
+        if (sscanf(input, "%f", &value) == 1) {
+            if (!push(&stack, value)) {
+                printf("Chyba: Zásobník je plný.\n");
+                break;
+            }
+        } else if (input[0] == '+' || input[0] == '-' || input[0] == '*' || input[0] == '/') {
+            if (!operation_insert_result(&stack, input[0])) {
+                break;
+            }
+        } else {
+            printf("Chyba: Neplatný vstup.\n");
+            break;
+        }
+        for (int i = 0; i <= stack.size; i++) {
+            printf("%.2f ", stack.data[i]);
+        }
+        printf("\n");
+    }
+    return 0;
+}
\ No newline at end of file