feat(letters): Use lettera A-Z instead of numbers.

src/conn.ts

@@ -50,7 +50,11 @@ const EMPTY = new SiteDescription(
         let problems = [];
 
         for (let i = 0; i < total; i++) {
-            problems.push(new Problem(`P${i + 1}`, `P${i + 1}`, [], []));
+            let name = `Z${i - 25}`;
+            if (i < 26) {
+                name = String.fromCharCode(i + 65);
+            }
+            problems.push(new Problem(name, name, [], []));
         }
 
         return new Contest(name, problems);

src/extension.ts

@@ -344,6 +344,7 @@ async function debugTestCase(uriPath: vscode.Uri) {
 }
 
 async function debugTest() {
+    vscode.window.showInformationMessage(String.fromCharCode(65));
     console.log("no bugs :O");
 }
 
@@ -365,7 +366,7 @@ export function activate(context: vscode.ExtensionContext) {
     let setCheckerCommand = vscode.commands.registerCommand('acmx.setChecker', setChecker);
     let debugTestCaseCommand = vscode.commands.registerCommand('acmx.debugTestCase', debugTestCase);
 
-    // let debugTestCommand = vscode.commands.registerCommand('acmx.debugTest', debugTest);
+    let debugTestCommand = vscode.commands.registerCommand('acmx.debugTest', debugTest);
 
     context.subscriptions.push(addProblemCommand);
     context.subscriptions.push(addContestCommand);
@@ -379,7 +380,7 @@ export function activate(context: vscode.ExtensionContext) {
     context.subscriptions.push(setCheckerCommand);
     context.subscriptions.push(debugTestCaseCommand);
 
-    // context.subscriptions.push(debugTestCommand);
+    context.subscriptions.push(debugTestCommand);
 }
 
 // this method is called when your extension is deactivated