ui-default: init

将ui-default合并至主存储库便于维护

packages/ui-default/templates/partials/problem_default.md

@@ -0,0 +1,30 @@
+# Background
+Special for beginners, ^_^
+
+# Description
+Given two integers x and y, print the sum.
+
+# Format
+
+## Input
+Two integers x and y, satisfying $0\leq x,y\leq 32767$ .
+
+## Output
+One integer, the sum of x and y.
+
+# Sample 1
+
+## Input
+
+```
+123 500
+```
+
+## Output
+
+```
+623
+```
+
+# Limitation
+1s, 1024KiB for each test case.