diff --git a/20240826/CSP2020-senior/CSP2020-senior-C-A.pdf b/20240826/CSP2020-senior/CSP2020-senior-C-A.pdf
new file mode 100644
index 0000000..1017733
Binary files /dev/null and b/20240826/CSP2020-senior/CSP2020-senior-C-A.pdf differ
diff --git a/20240826/CSP2020-senior/ans.txt b/20240826/CSP2020-senior/ans.txt
new file mode 100644
index 0000000..61781d0
--- /dev/null
+++ b/20240826/CSP2020-senior/ans.txt
@@ -0,0 +1,15 @@
+1.  C
+2.  B
+3.  B
+4.  B
+5.  D
+6.  B
+7.  B
+8.? A
+9.  A
+10. ?
+11. C
+12. D
+13. B
+14. C
+15.?D
\ No newline at end of file