fix: clarify brackets

Author: jaspwr

competition/unclosed-brackets/prob.md

@@ -16,4 +16,4 @@ difficulty = 1
 Given a snippet of C with unclosed curly braces (`{}`), determine the index of the first unclosed opening curly brace.
 
 ## Output Format
-Your output should be the index of the first unclosed opening curly brace.
+Your output should be the index (with the first character being index 0) of the first unclosed opening curly brace.

competition/unclosed-brackets/src/main.rs

@@ -127,12 +127,9 @@ fn run(seed: u64, method: &str) {
     };
 
     match method {
-        // If `fuzz`-ing, just output the prompt.
         "generate" => {
             println!("{}", src);
         }
-        // If `judge`-ing, to maintain fairness, we take the prompt rather than the tree
-        // and rebuild a tree from that, then match the input against the prefix notation.
         "validate" => {
             // Reads from user input.
             let mut buffer = String::new();
@@ -147,8 +144,6 @@ fn run(seed: u64, method: &str) {
                 exit(1);
             }
         }
-        // In this case, there is only one "correct" answer.
-        // In debugging, this can be directly outputted.
         "solution" => {
             println!("{}", solution);
         }