diff --git a/22Ex/input.txt b/22Ex/input.txt
deleted file mode 100644
index e69de29..0000000
diff --git a/22Ex/main.c b/22Ex/main.c
deleted file mode 100644
index d467ff4..0000000
--- a/22Ex/main.c
+++ /dev/null
@@ -1,30 +0,0 @@
-#include <stdio.h>
-#include "tools.h"
-
-int transposition(double * numbers);
-
-int transposition(double * numbers) {
-    unsigned length = (int)numbers[0];
-
-
-    int last_index = -1;
-    unsigned last_length = 0;
-
-    return 0
-}
-
-int main(void) {
-    double * numbers;
-    FILE * file = getFile();
-    if (file == NULL) return -1;
-
-    numbers = getList(file);
-    if (numbers == NULL) return -1;
-
-    if (transposition(numbers) != 0) return -1;
-
-    for (int i = 1; i < numbers[0]; ++i) printf("%d ", numbers[i]);
-
-    free(numbers);
-    return 0;
-}
diff --git a/13Ex/equal.c b/WorkingArrays/13Ex/equal.c
similarity index 100%
rename from 13Ex/equal.c
rename to WorkingArrays/13Ex/equal.c
diff --git a/13Ex/equal.h b/WorkingArrays/13Ex/equal.h
similarity index 100%
rename from 13Ex/equal.h
rename to WorkingArrays/13Ex/equal.h
diff --git a/13Ex/input.txt b/WorkingArrays/13Ex/input.txt
similarity index 100%
rename from 13Ex/input.txt
rename to WorkingArrays/13Ex/input.txt
diff --git a/13Ex/main.c b/WorkingArrays/13Ex/main.c
similarity index 100%
rename from 13Ex/main.c
rename to WorkingArrays/13Ex/main.c
diff --git a/13Ex/makefile b/WorkingArrays/13Ex/makefile
similarity index 100%
rename from 13Ex/makefile
rename to WorkingArrays/13Ex/makefile
diff --git a/13Ex/tools.c b/WorkingArrays/13Ex/tools.c
similarity index 100%
rename from 13Ex/tools.c
rename to WorkingArrays/13Ex/tools.c
diff --git a/13Ex/tools.h b/WorkingArrays/13Ex/tools.h
similarity index 100%
rename from 13Ex/tools.h
rename to WorkingArrays/13Ex/tools.h
diff --git a/15Ex/input.txt b/WorkingArrays/15Ex/input.txt
similarity index 100%
rename from 15Ex/input.txt
rename to WorkingArrays/15Ex/input.txt
diff --git a/15Ex/main.c b/WorkingArrays/15Ex/main.c
similarity index 100%
rename from 15Ex/main.c
rename to WorkingArrays/15Ex/main.c
diff --git a/15Ex/makefile b/WorkingArrays/15Ex/makefile
similarity index 100%
rename from 15Ex/makefile
rename to WorkingArrays/15Ex/makefile
diff --git a/15Ex/replace_local_min.c b/WorkingArrays/15Ex/replace_local_min.c
similarity index 100%
rename from 15Ex/replace_local_min.c
rename to WorkingArrays/15Ex/replace_local_min.c
diff --git a/15Ex/replace_local_min.h b/WorkingArrays/15Ex/replace_local_min.h
similarity index 100%
rename from 15Ex/replace_local_min.h
rename to WorkingArrays/15Ex/replace_local_min.h
diff --git a/15Ex/tools.c b/WorkingArrays/15Ex/tools.c
similarity index 100%
rename from 15Ex/tools.c
rename to WorkingArrays/15Ex/tools.c
diff --git a/15Ex/tools.h b/WorkingArrays/15Ex/tools.h
similarity index 100%
rename from 15Ex/tools.h
rename to WorkingArrays/15Ex/tools.h
diff --git a/WorkingArrays/22Ex/input.txt b/WorkingArrays/22Ex/input.txt
new file mode 100644
index 0000000..f0ac2bb
--- /dev/null
+++ b/WorkingArrays/22Ex/input.txt
@@ -0,0 +1 @@
+1 1 2 3 2 2 2 3 3 3 4 4 4 0 0 0 9 9 9 7 7 7 8 8 8 5 5
\ No newline at end of file
diff --git a/WorkingArrays/22Ex/local_minimum.c b/WorkingArrays/22Ex/local_minimum.c
new file mode 100644
index 0000000..bf3334f
--- /dev/null
+++ b/WorkingArrays/22Ex/local_minimum.c
@@ -0,0 +1,56 @@
+#include "local_minimum.h"
+
+int transposition(double * numbers, unsigned * start_end)
+{
+    unsigned f_start = start_end[0], f_end = start_end[1], s_start = start_end[2], s_end = start_end[3];
+    unsigned f_len = f_end - f_start + 1, s_len = s_end - s_start + 1, betw_len = s_start - f_end - 1;
+
+    double buffer[start_end[3] - start_end[0] + 1];
+
+    for (unsigned i = 0; i < s_len; ++i) buffer[i] = numbers[s_start + i];
+    for (unsigned i = 0; i < betw_len; ++i) buffer[i + s_len] = numbers[f_end + 1 + i];
+    for (unsigned i = 0; i < f_len; ++i) buffer[i + s_len + betw_len] = numbers[f_start + i];
+    for (unsigned i = f_start; i <= s_end; ++i) numbers[i] = buffer[i - f_start];
+
+    return 0;
+}
+
+
+int searching_loc_min(double * numbers)
+{
+    unsigned length = (int)numbers[0];
+    unsigned start_end[4];
+    int curr_len = 1;
+
+    bool min_num = false;
+
+
+    for (unsigned i = 2; i < length; ++i) {
+        if (numbers[i] == numbers[i - 1]) {
+            if (curr_len) ++curr_len;
+        } else if (numbers[i] > numbers[i - 1]) {
+            if (curr_len) {
+                // It is important to remember that numbers[0] is equal to the length of the list!
+                start_end[0 + (min_num * 2)] = (i - curr_len), start_end[1 + (min_num * 2)] = i - 1;
+
+                if (min_num) {
+                    if (transposition(numbers, start_end)) return -1;
+                    memset(start_end, 0, sizeof(start_end));
+                }
+
+                min_num = !min_num;
+                curr_len = 0;
+            }
+        } else {
+            curr_len = 1;
+        }
+    }
+
+    if (curr_len) {
+        start_end[0 + (min_num * 2)] = (length - curr_len), start_end[1 + (min_num * 2)] = length - 1;
+
+        if (min_num && transposition(numbers, start_end)) return -1;
+    }
+
+    return 0;
+}
diff --git a/WorkingArrays/22Ex/local_minimum.h b/WorkingArrays/22Ex/local_minimum.h
new file mode 100644
index 0000000..dae8dcf
--- /dev/null
+++ b/WorkingArrays/22Ex/local_minimum.h
@@ -0,0 +1,10 @@
+#ifndef LOCAL_MINIMUM
+#define LOCAL_MINIMUM
+
+#include <string.h>
+#include <stdbool.h>
+
+int transposition(double * numbers, unsigned * start_end);
+int searching_loc_min(double * numbers);
+
+#endif // LOCAL_MINIMUM
diff --git a/WorkingArrays/22Ex/main.c b/WorkingArrays/22Ex/main.c
new file mode 100644
index 0000000..6b9b72e
--- /dev/null
+++ b/WorkingArrays/22Ex/main.c
@@ -0,0 +1,19 @@
+#include <stdio.h>
+#include "tools.h"
+#include "local_minimum.h"
+
+int main(void) {
+    double * numbers;
+    FILE * file = getFile();
+    if (file == NULL) return -1;
+
+    numbers = getList(file);
+    if (numbers == NULL) return -1;
+
+    if (searching_loc_min(numbers)) return -1;
+
+    for (int i = 1; i < numbers[0]; ++i) printf("%.1lf ", numbers[i]);
+
+    free(numbers);
+    return 0;
+}
diff --git a/WorkingArrays/22Ex/makefile b/WorkingArrays/22Ex/makefile
new file mode 100644
index 0000000..6016e1e
--- /dev/null
+++ b/WorkingArrays/22Ex/makefile
@@ -0,0 +1,11 @@
+all: main.o local_minimum.o tools.o
+	gcc main.o local_minimum.o tools.o && del *.o
+	
+main.o: main.c
+	gcc -c main.c
+
+local_minimum.o: local_minimum.c
+	gcc -c local_minimum.c
+
+tools.o: tools.c
+	gcc -c tools.c
\ No newline at end of file
diff --git a/22Ex/tools.c b/WorkingArrays/22Ex/tools.c
similarity index 96%
rename from 22Ex/tools.c
rename to WorkingArrays/22Ex/tools.c
index f2ebc66..7f14c54 100644
--- a/22Ex/tools.c
+++ b/WorkingArrays/22Ex/tools.c
@@ -22,7 +22,8 @@ FILE * getFile(void)
     }
 }
 
-double * getList(FILE * file) {
+double * getList(FILE * file)
+{
     double current;
     int i, length = 2;
     double * numbers = NULL;
diff --git a/22Ex/tools.h b/WorkingArrays/22Ex/tools.h
similarity index 100%
rename from 22Ex/tools.h
rename to WorkingArrays/22Ex/tools.h