diff --git a/data/51nod b/data/51nod
new file mode 100644
index 00000000..8072f95c
--- /dev/null
+++ b/data/51nod
@@ -0,0 +1 @@
+51nod.com
diff --git a/data/category-dev b/data/category-dev
index bfeeb687..d10cf0bc 100644
--- a/data/category-dev
+++ b/data/category-dev
@@ -48,6 +48,7 @@ include:strikingly
 include:tencent-dev
 include:termux
 include:thelinuxfoundation
+include:topcoder
 include:unity
 include:v8
 include:vim
diff --git a/data/category-scholar-!cn b/data/category-scholar-!cn
index b10280c5..4ccdea6a 100644
--- a/data/category-scholar-!cn
+++ b/data/category-scholar-!cn
@@ -175,6 +175,7 @@ totalmateria.com # Total Materia
 uchicago.edu
 ucla.edu
 umass.edu
+usaco.org
 westlaw.com
 wiley.com
 wolterskluwer.com
diff --git a/data/geolocation-cn b/data/geolocation-cn
index 9a616f80..da4c0425 100644
--- a/data/geolocation-cn
+++ b/data/geolocation-cn
@@ -213,6 +213,7 @@ include:tipdm
 include:xueyuanjun
 
 # 信息学
+include:51nod
 acwing.com
 hihocoder.com
 jisuanke.com
diff --git a/data/topcoder b/data/topcoder
new file mode 100644
index 00000000..7f98f62f
--- /dev/null
+++ b/data/topcoder
@@ -0,0 +1 @@
+topcoder.com