add challenge scripts

js/03_are_you_still_doing_this_by_hand.js

@@ -0,0 +1,33 @@
+const p = 12345679943n;
+
+function onClick() {
+    if(n >= 30000n) {
+        return;
+    }
+    n++;
+    x = log(42n, 1n + (x+n) % (p-1n), p);
+}
+
+function log(g, b, m) {
+    const s = Math.ceil(Number(m)**.5);
+    const r = new Map();
+    let a = b % m;
+    if(a == 1n) {
+        return 0n;
+    }
+    for(let i = 0; i < s; i++) {
+        r.set(a, i);
+        a *= g;
+        a %= m;
+    }
+    const gs = pow(g, BigInt(s), m);
+    a = gs;
+    for(let j = 1; j <= s; j++) {
+        const i = r.get(a);
+        if(i !== undefined) {
+            return BigInt(j*s-i);
+        }
+        a *= gs;
+        a %= m;
+    }
+}