diff --git a/src/week01/dasol/PG_12901.java b/src/week01/dasol/PG_12901.java
new file mode 100644
index 0000000..8759636
--- /dev/null
+++ b/src/week01/dasol/PG_12901.java
@@ -0,0 +1,14 @@
+class PG_12901 {
+    public String solution(int a, int b) {
+        //a=1; b=1;
+        String answer = "";
+        int[] months = {0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
+        String[] weeks = {"FRI","SAT","SUN","MON","TUE","WED","THU"};
+        int days = b-1;
+        for (int i=1 ; i<a ; i++) {
+            days+=months[i];
+        }
+        
+        return weeks[days%7];
+    }
+}
\ No newline at end of file
diff --git a/src/week01/dasol/PG_68935.java b/src/week01/dasol/PG_68935.java
new file mode 100644
index 0000000..7ea9b58
--- /dev/null
+++ b/src/week01/dasol/PG_68935.java
@@ -0,0 +1,5 @@
+class PG_68935 {
+    public int solution(int n) {
+        return Integer.parseInt(new StringBuilder(Integer.toString(n, 3)).reverse().toString(),3);
+    }
+}
\ No newline at end of file