10 files changed, 146 insertions, 0 deletions
diff --git a/challenge-153/laurent-rosenfeld/awk/ch-1.awk b/challenge-153/laurent-rosenfeld/awk/ch-1.awk
new file mode 100644
index 0000000000..a30c9ae1e0
--- /dev/null
+++ b/challenge-153/laurent-rosenfeld/awk/ch-1.awk
@@ -0,0 +1,10 @@
+BEGIN {
+    left_fact = 1
+    fact = 1
+    for (i = 1; i <= 10; i++) {
+        printf "%d ", left_fact
+        fact *= i
+        left_fact += fact
+    }
+    printf "\n"
+}
diff --git a/challenge-153/laurent-rosenfeld/awk/ch-2.awk b/challenge-153/laurent-rosenfeld/awk/ch-2.awk
new file mode 100644
index 0000000000..ccd2287410
--- /dev/null
+++ b/challenge-153/laurent-rosenfeld/awk/ch-2.awk
@@ -0,0 +1,23 @@
+function populate_fact() {
+    fact[0] = 1
+    for (n = 1; n <= 9; n++) {
+        fact[n] = n * fact[n - 1]
+    }
+}
+function is_factorion(num) {
+    sum = 0
+    start_num = num
+    for (n = 0; n < length(start_num); n++) {
+        sum += fact[num % 10]
+        num = int(num / 10)
+    }
+    return sum == start_num
+ }
+BEGIN {
+    populate_fact()
+    for (i = 1; i <= 50000; i++) {
+        if (is_factorion(i)) {
+            print i
+        }
+    }
+}
diff --git a/challenge-153/laurent-rosenfeld/bc/ch-1.bc b/challenge-153/laurent-rosenfeld/bc/ch-1.bc
new file mode 100644
index 0000000000..40c14057fc
--- /dev/null
+++ b/challenge-153/laurent-rosenfeld/bc/ch-1.bc
@@ -0,0 +1,8 @@
+sum = 1
+fact = 1
+
+for (n = 1; n <= 10; n ++) {
+    print sum, " "
+    fact = fact * n
+    sum = sum + fact
+}
diff --git a/challenge-153/laurent-rosenfeld/bc/ch-2.bc b/challenge-153/laurent-rosenfeld/bc/ch-2.bc
new file mode 100644
index 0000000000..f813c4560d
--- /dev/null
+++ b/challenge-153/laurent-rosenfeld/bc/ch-2.bc
@@ -0,0 +1,16 @@
+fact[0] = 1
+for (n = 1; n <= 9; n++) {
+    fact[n] = n * fact[n - 1]
+}
+for (n = 1; n <= 50000; n++) {
+    sum = 0
+    i = n
+    while (i > 0) {
+        sum += fact[i % 10]
+        i /= 10
+    }
+    if (sum == n) {
+        print n, " "
+    }
+}
+halt
diff --git a/challenge-153/laurent-rosenfeld/c/ch-1.c b/challenge-153/laurent-rosenfeld/c/ch-1.c
new file mode 100644
index 0000000000..f5be36aaa2
--- /dev/null
+++ b/challenge-153/laurent-rosenfeld/c/ch-1.c
@@ -0,0 +1,13 @@
+#include <stdio.h>
+
+int main () {
+    int sum = 1;
+    int fact = 1;
+    for (int i = 1; i <= 10; i++) {
+        printf("%d ", sum);
+        fact *= i;
+        sum += fact;
+    }
+    printf ("\n");
+    return 0;
+}
diff --git a/challenge-153/laurent-rosenfeld/c/ch-2.c b/challenge-153/laurent-rosenfeld/c/ch-2.c
new file mode 100644
index 0000000000..9ea60c09fe
--- /dev/null
+++ b/challenge-153/laurent-rosenfeld/c/ch-2.c
@@ -0,0 +1,27 @@
+#include <stdio.h>
+
+char is_factorion(int fact[], int num) {
+    int sum = 0;
+    int n = num;
+    while (n > 0) {
+        sum += fact[n % 10];
+        n /= 10;
+    }
+    return num == sum;
+}
+
+int main() {
+    int fact[10];
+    fact[0] = 1;
+    for (int i = 1; i <= 9; i++) {
+        fact[i] = i * fact[i - 1];
+    }
+
+    for (int n = 1; n < 50000; n++) {
+        if (is_factorion(fact, n)) {
+            printf("%d ", n);
+        }
+    }
+    printf("\n");
+    return 0;
+}
diff --git a/challenge-153/laurent-rosenfeld/python/ch-1.py b/challenge-153/laurent-rosenfeld/python/ch-1.py
new file mode 100644
index 0000000000..159f8db710
--- /dev/null
+++ b/challenge-153/laurent-rosenfeld/python/ch-1.py
@@ -0,0 +1,7 @@
+fact = 1
+left_fact = 1
+
+for n in range (1, 11):
+    print(left_fact)
+    fact = fact * n
+    left_fact = left_fact + fact
diff --git a/challenge-153/laurent-rosenfeld/python/ch-2.py b/challenge-153/laurent-rosenfeld/python/ch-2.py
new file mode 100644
index 0000000000..6468fa9f27
--- /dev/null
+++ b/challenge-153/laurent-rosenfeld/python/ch-2.py
@@ -0,0 +1,15 @@
+fact = [1] * 10
+for n in range (1, 10):
+    fact[n] = n * fact[n - 1]
+
+def is_factorion (input):
+    sum = 0
+    n = str(input)
+    for i in range (0, len(n)):
+        sum = sum + fact[int(n[i])]
+
+    return input == sum
+
+for n in range(1, 50000):
+    if is_factorion(n):
+        print(n)
diff --git a/challenge-153/laurent-rosenfeld/ring/ch-1.ring b/challenge-153/laurent-rosenfeld/ring/ch-1.ring
new file mode 100644
index 0000000000..ff0aff779d
--- /dev/null
+++ b/challenge-153/laurent-rosenfeld/ring/ch-1.ring
@@ -0,0 +1,8 @@
+left_fact = 1
+fact = 1
+for i = 1 to 10
+    see " " + left_fact
+    fact *= i
+    left_fact += fact
+next
+see " " + nl
diff --git a/challenge-153/laurent-rosenfeld/ring/ch-2.ring b/challenge-153/laurent-rosenfeld/ring/ch-2.ring
new file mode 100644
index 0000000000..5f9d4989fd
--- /dev/null
+++ b/challenge-153/laurent-rosenfeld/ring/ch-2.ring
@@ -0,0 +1,19 @@
+fact = [1, 1]
+for k = 2 to 9
+    add (fact, k * fact[k]) # list indices start at 1
+next
+# see fact + nl
+for n = 1 to 50000
+    if is_factorion(fact, n)
+        see n + nl
+    ok
+next
+
+func is_factorion fact, input
+    sum = 0
+    n = "" + input
+    for i = 1 to len(n)
+        digit = n[i]
+        sum += fact[1 + digit]
+    next
+    return input = sum