diff --git a/du3/output/program.exe b/du3/output/program.exe
index 7099261..cead150 100644
Binary files a/du3/output/program.exe and b/du3/output/program.exe differ
diff --git a/du3/program.c b/du3/program.c
index dee0e9f..5fba259 100644
--- a/du3/program.c
+++ b/du3/program.c
@@ -1,34 +1,31 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <ctype.h>
 #define STACK_SIZE 10
 
-
-struct stack {
-    float values[STACK_SIZE];
+struct stack{
+    float *values;
     int size;
+    int capacity;
 };
 
-void push_stack(struct stack* stack, float value) {
-    if (stack->size >= STACK_SIZE) {
-        printf("Error!\n");
+struct stack* create_stack (int capacity) {
+    struct stack* s = malloc (sizeof(struct stack));
+    if (s==NULL) {
+        printf("Error!");
         exit(1);
     }
-    stack->values[stack->size] = value;
-    stack->size++;
-    
+    s->values = malloc(capacity * sizeof(float));
+    if (s->values==NULL) {
+        printf("Error!");
+        free(s);
+        exit(1);
+    }
+    s->size = 0;
+    s->capacity = capacity;
+    return s;
 }
 
-float pop_stack(struct stack* stack) {
-
-}
-
-int count_stack(struct stack* stuck) {
-
-}
-
-
 int main() {
     return 0;
 }
\ No newline at end of file