Implement challenge 24 and finish set 3.

src/main.rs

@@ -4,13 +4,16 @@ mod cbc;
 mod ctr;
 mod ecb;
 mod mt19937;
+mod mtcipher;
 mod parser;
 mod set1;
 mod set2;
 mod set3;
+mod set4;
+mod utils;
 
 fn main() {
-    const RUN_ALL: bool = true;
+    const RUN_ALL: bool = false;
     if RUN_ALL {
         set1::challenge1();
         set1::challenge2();
@@ -36,7 +39,8 @@ fn main() {
         set3::challenge22();
         set3::challenge23();
         set3::challenge24();
+        set4::challenge25();
     } else {
-        set3::challenge24();
+        set4::challenge25();
     }
 }