diff --git a/du1/program.c b/du1/program.c
index d61f74f..d2f9af9 100644
--- a/du1/program.c
+++ b/du1/program.c
@@ -2,20 +2,12 @@
 
 int main(){
     
-    int c= 0;
-    while(1){
+    char riadok[LINE_SIZE];
+    memset(riadok, 0,LINE_SIZE);
+    char* r = fgets(riadok,LINE_SIZE,stdin);
 
-        c = getchar();
-        if (c < 0) break;
-
-        if (c >= 97 && c <= 122){
-            c = c - 'a' + 'A';
-        } else
-        if (c >= 65 && c <= 90){
-            c = c - 'A' + 'a';
-        }
-        putchar(c);
+    if (r == NULL){
+        return 0;
     }
-
     return 0;
 }
\ No newline at end of file