agcd print update

.gitignore

@@ -1,2 +1,4 @@
 /target
 scripts/__pycache__/
+*.txt
+Cargo.lock

src/agcd.rs

@@ -21,6 +21,11 @@ pub fn agcd(ciphertexts: Vec<Integer>, noise_bits: usize) -> Integer {
     let q0 = &shortest_vector[0] / (Integer::from(1) << (noise_bits + 1));
     println!("q0: {}", q0);
 
+    if q0 == 0 {
+        println!("Couldn't recover p.");
+        return Integer::from(0);
+    }
+
     // 5. Find p
     // compute r0 = x0 (mod q0)
     // and p = (x0 − r0)/q0.
@@ -31,5 +36,7 @@ pub fn agcd(ciphertexts: Vec<Integer>, noise_bits: usize) -> Integer {
     let p_guess = abs((x0 - r0) / q0);
 
     println!("Recovered p: {}", p_guess);
+    println!("Approximate GCD with noise_bits={}: {}", noise_bits, p_guess);
+
     p_guess
 }