did stuff

hello.c

@@ -2,5 +2,5 @@
 // vim: set ts=4 sw=4 tw=80 et:
 
 int main() {
-    printf("Hello\n");
+    printf("Hello World!\n");
 }

modular_exponentiation.py

@@ -0,0 +1,16 @@
+import math
+import sys
+
+def mod_exp(x, y, m):
+    k = x % m
+    for i in range(y):
+        print(i)
+        k = (k * x) % m
+    return k
+
+line = sys.stdin.readline().split()
+x = int(line[0])
+y = int(line[1])
+m = int(line[2])
+
+print(mod_exp(x, y, m))

modulat.txt

@@ -0,0 +1 @@
+457327 129852986013369 53279108