diff --git a/du1/output/program.exe b/du1/output/program.exe
new file mode 100644
index 0000000..c1bf426
Binary files /dev/null and b/du1/output/program.exe differ
diff --git a/du1/program.c b/du1/program.c
index 2c35062..106852d 100644
--- a/du1/program.c
+++ b/du1/program.c
@@ -1,7 +1,14 @@
 #include <stdio.h>
 #include <ctype.h>
+#include <string.h>
 #define LINESIZE 100
 
+struct pizza {
+   float size;
+   char name[LINESIZE];
+};
+
+
 void deshifr (char *text) {
    for (int i = 0; text[i] != '\0'; i++) {
       switch (text[i]) {
@@ -40,14 +47,31 @@ void deshifr (char *text) {
    }
 }
 
+int search_string (const char* heap_orig, const char* needle_orig) {
+   char heap[LINESIZE];
+   char needle[LINESIZE];
+   strcpy (heap, heap_orig);
+   strcpy (needle, needle_orig);
+   deshifr(heap);
+   deshifr(needle);
+   int heap_len = strlen(heap);
+   int needle_len = strlen(needle);
+
+   for (int i = 0; i <= heap_len - needle_len; i++) {
+      int j;
+         for (j = 0; j < needle_len; j++) {
+            if (heap[i+j] != needle[j]) {
+               break;
+               }
+            }
+         if (j == needle_len) {
+            return i;
+         }
+      }
+   return -1;
+}
+
 
 int main() {
-   
-
-   struct pizza {
-      float prize;
-      char name[LINESIZE];
-   };
-
-return 0;
+   return 0;
 }
\ No newline at end of file