diff --git a/The Last Algorithms Course You'll Need/5. Two Crystal Balls.c b/The Last Algorithms Course You'll Need/5. Two Crystal Balls.c
new file mode 100644
index 0000000..d3501c2
--- /dev/null
+++ b/The Last Algorithms Course You'll Need/5. Two Crystal Balls.c	
@@ -0,0 +1,32 @@
+#include <math.h>
+#include <stdio.h>
+
+#define SIZE 999
+
+int two_crystal_balls_search(int array[], int size, int value)
+{
+	int i = 0;
+	int step = sqrt((double)(size));
+	for (; i < size; i = i + step)
+		if (array[i] >= value)
+			break;
+
+	printf("Step is: %d\n", step);
+	printf("The first one broke at: %d\n", i);
+
+	i = i - step;
+	for (; i < i + step; ++i)
+		if (array[i] >= value)
+			return i;
+
+	return -1;
+}
+
+int main()
+{
+	int array[SIZE];
+	for (int i = 0; i < SIZE; ++i)
+		array[i] = i;
+
+	printf("The balls break at: %d\n", two_crystal_balls_search(array, SIZE, 567));
+}