add problem.

src/utils/constants.ts

@@ -119,11 +119,26 @@ export const STORAGE_KEY = {
   USER: "user",
 }
 
+export const DIFFICULTY = {
+  Low: "简单",
+  Mid: "中等",
+  High: "困难",
+}
+
+export function getTagColor(tag: string) {
+  return {
+    Low: "success",
+    Mid: "",
+    High: "danger",
+    简单: "success",
+    中等: "",
+    困难: "danger",
+  }[tag]
+}
+
 export function buildProblemCodeKey(problemID: number, contestID = null) {
   if (contestID) {
     return `${STORAGE_KEY.PROBLEM_CODE}_${contestID}_${problemID}`
   }
   return `${STORAGE_KEY.PROBLEM_CODE}_NaN_${problemID}`
 }
-
-export const GOOGLE_ANALYTICS_ID = "UA-111499601-1"