diff --git a/SelfEducation/Task/T4/6ticket/func.c b/SelfEducation/Task/T4/6ticket/func.c
index 8e81eb2..2b116b9 100644
--- a/SelfEducation/Task/T4/6ticket/func.c
+++ b/SelfEducation/Task/T4/6ticket/func.c
@@ -5,6 +5,7 @@
 void print_revers(int x)
 {
     int res = 0;
+    int *p_res = &res;
     for (int i = N - 1; i > -1; i--)
     {
         res += (x / (int)pow(10, i)) * (int)pow(10, (N - 1 - i));
@@ -12,5 +13,5 @@ void print_revers(int x)
         printf("%d | %d\n", x, res);
     }
 
-    printf("%d\n", res);
+    printf("%d %ls\n", res, p_res);
 }
\ No newline at end of file
diff --git a/SelfEducation/Task/T4/6ticket/out/6t_app b/SelfEducation/Task/T4/6ticket/out/6t_app
index 494aea4..2939662 100755
Binary files a/SelfEducation/Task/T4/6ticket/out/6t_app and b/SelfEducation/Task/T4/6ticket/out/6t_app differ
diff --git a/SelfEducation/Task/T4/center/func.c b/SelfEducation/Task/T4/center/func.c
new file mode 100644
index 0000000..256e6f6
--- /dev/null
+++ b/SelfEducation/Task/T4/center/func.c
@@ -0,0 +1,17 @@
+#include <stdio.h>
+
+void center(int xlt, int ylt, int xrb, int yrb, int *pxc, int *pyc)
+{
+    *pxc = (xlt + xrb) / 2;
+    *pyc = (ylt + yrb) / 2;
+}
+
+void rotateC(int *x1, int *y1, int *x2, int *y2)
+{
+    int t1 = *x1, t2 = *x2;
+
+    *x1 = *y2;
+    *x2 = *y1;
+    *y1 = t2;
+    *y2 = t1;
+}
\ No newline at end of file
diff --git a/SelfEducation/Task/T4/center/main.c b/SelfEducation/Task/T4/center/main.c
new file mode 100644
index 0000000..26753fb
--- /dev/null
+++ b/SelfEducation/Task/T4/center/main.c
@@ -0,0 +1,20 @@
+#include <stdio.h>
+
+void center(int xlt, int ylt, int xrb, int yrb, int *pxc, int *pyc);
+void rotateC(int *x1, int *y1, int *x2, int *y2);
+
+int main()
+{
+    int xlt, ylt, xrb, yrb, xc, yc;
+    int *pxc = &xc, *pyc = &yc;
+
+    scanf("%d%d%d%d", &xlt, &ylt, &xrb, &yrb);
+
+    center(xlt, ylt, xrb, yrb, pxc, pyc);
+
+    rotateC(&xlt, &ylt, &xrb, &yrb);
+
+    printf("%d %d %d %d\n", xlt, ylt, xrb, yrb);
+
+    return 0;
+}
\ No newline at end of file
diff --git a/SelfEducation/Task/T4/center/out/cent_app b/SelfEducation/Task/T4/center/out/cent_app
new file mode 100755
index 0000000..5cffcb8
Binary files /dev/null and b/SelfEducation/Task/T4/center/out/cent_app differ
diff --git a/SelfEducation/Task/T4/min2time/func.c b/SelfEducation/Task/T4/min2time/func.c
new file mode 100644
index 0000000..78c4d9e
--- /dev/null
+++ b/SelfEducation/Task/T4/min2time/func.c
@@ -0,0 +1,7 @@
+#include <stdio.h>
+
+void min2time(int mm, int *ph, int *pm)
+{
+    *ph = (mm / 60) % 24;
+    *pm = (mm - ((mm / 60) % 24) * 60) % 60;
+}
\ No newline at end of file
diff --git a/SelfEducation/Task/T4/min2time/main.c b/SelfEducation/Task/T4/min2time/main.c
new file mode 100644
index 0000000..a20591c
--- /dev/null
+++ b/SelfEducation/Task/T4/min2time/main.c
@@ -0,0 +1,15 @@
+#include <stdio.h>
+
+void min2time(int mm, int *ph, int *pm);
+
+int main()
+{
+    int mm, h, m;
+    scanf("%d", &mm);
+
+    min2time(mm, &h, &m);
+
+    printf("%02d:%02d\n", h, m);
+
+    return 0;
+}
\ No newline at end of file
diff --git a/SelfEducation/Task/T4/min2time/out/m2t_app b/SelfEducation/Task/T4/min2time/out/m2t_app
new file mode 100755
index 0000000..1e0f022
Binary files /dev/null and b/SelfEducation/Task/T4/min2time/out/m2t_app differ
diff --git a/SelfEducation/Task/T4/mirror/func.c b/SelfEducation/Task/T4/mirror/func.c
new file mode 100644
index 0000000..3cfcda2
--- /dev/null
+++ b/SelfEducation/Task/T4/mirror/func.c
@@ -0,0 +1,12 @@
+#include <stdio.h>
+
+void mirror(int *px, int *py)
+{
+    *px = *px * (-1);
+}
+
+void mirror_seg(int *px1, int *py1, int *px2, int *py2)
+{
+    *py1 *= -1;
+    *py2 *= -1;
+}
\ No newline at end of file
diff --git a/SelfEducation/Task/T4/mirror/main.c b/SelfEducation/Task/T4/mirror/main.c
new file mode 100644
index 0000000..05013b8
--- /dev/null
+++ b/SelfEducation/Task/T4/mirror/main.c
@@ -0,0 +1,24 @@
+#include <stdio.h>
+
+void mirror(int *px, int *py);
+void mirror_seg(int *px1, int *py1, int *px2, int *py2);
+
+int main()
+{
+    int x1, y1, x2, y2;
+    int *px1 = &x1, *py1 = &y1;
+    int *px2 = &x2, *py2 = &y2;
+
+    scanf("%d%d", px1, py1);
+    scanf("%d%d", px2, py2);
+
+    // mirror(px1, py1);
+
+    // printf("%d %d\n", x1, y1);
+
+    mirror_seg(px1, py1, px2, py2);
+
+    printf("%d %d %d %d\n", x1, y1, x2, y2);
+
+    return 0;
+}
\ No newline at end of file
diff --git a/SelfEducation/Task/T4/mirror/out/m_app b/SelfEducation/Task/T4/mirror/out/m_app
new file mode 100755
index 0000000..30616ca
Binary files /dev/null and b/SelfEducation/Task/T4/mirror/out/m_app differ
diff --git a/SelfEducation/Task/T4/move/func.c b/SelfEducation/Task/T4/move/func.c
new file mode 100644
index 0000000..dc21d3b
--- /dev/null
+++ b/SelfEducation/Task/T4/move/func.c
@@ -0,0 +1,7 @@
+#include <stdio.h>
+
+void move(int *px, int *py, int dx, int dy)
+{
+    *px += dx;
+    *py += dy;
+}
diff --git a/SelfEducation/Task/T4/move/main.c b/SelfEducation/Task/T4/move/main.c
new file mode 100644
index 0000000..da3cd7d
--- /dev/null
+++ b/SelfEducation/Task/T4/move/main.c
@@ -0,0 +1,17 @@
+#include <stdio.h>
+
+void move(int *px, int *py, int dx, int dy);
+
+int main()
+{
+    int x, y, dx, dy;
+    int *px = &x, *py = &y;
+
+    scanf("%d%d%d%d", px, py, &dx, &dy);
+
+    move(px, py, dx, dy);
+
+    printf("%d %d\n", *px, *py);
+
+    return 0;
+}
\ No newline at end of file
diff --git a/SelfEducation/Task/T4/move/out/move_app b/SelfEducation/Task/T4/move/out/move_app
new file mode 100755
index 0000000..79ccd1e
Binary files /dev/null and b/SelfEducation/Task/T4/move/out/move_app differ
diff --git a/SelfEducation/Task/T4/swap/func.c b/SelfEducation/Task/T4/swap/func.c
new file mode 100644
index 0000000..0868fc7
--- /dev/null
+++ b/SelfEducation/Task/T4/swap/func.c
@@ -0,0 +1,12 @@
+#include <stdio.h>
+
+void swap(int *px, int *py)
+{
+    int t;
+
+    t = *px;
+    *px = *py;
+    *py = t;
+
+    return;
+}
diff --git a/SelfEducation/Task/T4/swap/main.c b/SelfEducation/Task/T4/swap/main.c
new file mode 100644
index 0000000..8425656
--- /dev/null
+++ b/SelfEducation/Task/T4/swap/main.c
@@ -0,0 +1,14 @@
+#include <stdio.h>
+
+void swap(int *px, int *py);
+
+int main()
+{
+    int x, y;
+    scanf("%d%d", &x, &y);
+
+    swap(&x, &y);
+
+    printf("%d %d\n", x, y);
+    return 0;
+}
diff --git a/SelfEducation/Task/T4/swap/out/swap_app b/SelfEducation/Task/T4/swap/out/swap_app
new file mode 100755
index 0000000..52c6004
Binary files /dev/null and b/SelfEducation/Task/T4/swap/out/swap_app differ