diff --git a/src/bidendalausbid.py b/src/bidendalausbid.py
new file mode 100644
index 0000000..bef33be
--- /dev/null
+++ b/src/bidendalausbid.py
@@ -0,0 +1,13 @@
+sh, sm = [int(d) for d in input().split(":")]
+eh, em = [int(d) for d in input().split(":")]
+dh, dm = 0, 0
+dh = eh - sh
+if dh < 0:
+    dh += 24
+dm = em - sm
+if dm < 0:
+    dm += 60
+    dh -= 1
+if dh < 0:
+    dh += 24
+print(60 * dh + dm)
diff --git a/src/maetingarlisti.py b/src/maetingarlisti.py
new file mode 100644
index 0000000..7966b55
--- /dev/null
+++ b/src/maetingarlisti.py
@@ -0,0 +1,8 @@
+n, r, c = [int(d) for d in input().split()]
+a = [input().split() for _ in range(r)]
+for i in range(r):
+    b = [input() for _ in range(c)]
+    if a[i] == b:
+        print("left")
+    else:
+        print("right")
diff --git a/src/skak.py b/src/skak.py
new file mode 100644
index 0000000..9f564f2
--- /dev/null
+++ b/src/skak.py
@@ -0,0 +1,6 @@
+xh, yh = [int(d) for d in input().split()]
+xp, yp = [int(d) for d in input().split()]
+if xh == xp or yh == yp:
+    print(1)
+else:
+    print(2)