diff --git a/du3/output/program.exe b/du3/output/program.exe
index cead150..e145c0d 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 d21a7c5..bbe5786 100644
--- a/du3/program.c
+++ b/du3/program.c
@@ -57,12 +57,47 @@ void destroy_stack (struct stack* s) {
 }
 
 int main() {
-    struct stack* novystack = create_stack(STACK_SIZE);
-    push_stack(novystack, 3.14);
-    push_stack(novystack, 2.71);
-    float x = pop_stack(novystack);
-    printf("Popped: %2.f\n", x);
-    print_stack(novystack);
-    destroy_stack(novystack);
+    struct stack* s = create_stack(STACK_SIZE);
+    char input[101];
+    while (scanf("%s", input)==1) {
+        char *end;
+        float value = strtof(input, &end);
+        if (*end == '\0') {
+            push_stack(s, value);
+            print_stack(s);
+        } else if (strcmp(input, "+")==0 || strcmp(input, "-")==0 || strcmp(input, "*")==0 || strcmp(input, "/")==0) {
+            if (s->size < 2) {
+                printf("no input\n");
+                destroy_stack(s);
+                return 0;
+            }
+            
+            float b = pop_stack(s);
+            float a = pop_stack(s);
+            float result = 0;
+
+            if (strcmp(input, "+")==0) {
+                result = a+b;
+            }
+            if (strcmp(input, "-")==0) {
+                result = a - b;
+            }
+            if (strcmp(input, "*")==0) {
+                result = a * b;
+            }
+            if (strcmp(input, "/")==0) {
+                result = a/b;
+            }
+            push_stack(s);
+            print_stack(s);
+        }
+        else {
+                printf("no input");
+                destroy_stack(s);
+                return 0;
+        }
+    }
+    destroy_stack(s);
     return 0;
+
 }
\ No newline at end of file