diff --git a/code_study/Baekjoon/c/2442.c b/code_study/Baekjoon/c/2442.c
new file mode 100644
index 0000000..e5955bc
--- /dev/null
+++ b/code_study/Baekjoon/c/2442.c
@@ -0,0 +1,25 @@
+#include <stdio.h>
+
+int N;
+
+void blank(int n) {
+    for(int i=0; i<n; i++)
+        printf(" ");
+}
+
+void star(int n) {
+    for(int i=0; i<n; i++)
+        printf("*");
+}
+
+int main() {
+    scanf("%d",&N);
+
+    for(int i=1; i<=N; i++) {
+        blank(N-i);
+        star(2*i - 1);
+        printf("\n");
+    }
+
+    return 0;
+}
\ No newline at end of file
diff --git a/code_study/Baekjoon/python/20303.py b/code_study/Baekjoon/python/20303.py
new file mode 100644
index 0000000..7bfb8aa
--- /dev/null
+++ b/code_study/Baekjoon/python/20303.py
@@ -0,0 +1,44 @@
+import sys
+input = sys.stdin.readline
+
+N, M, K = map(int, input().split())
+
+candys = [0] + list(map(int, input().split()))
+counts = [1] * (N+1)
+parents = [i for i in range(N+1)]
+
+def find(x) :
+    if parents[x] != x :
+        parents[x] = find(parents[x])
+    return parents[x]
+
+def union(x, y) :
+    x = find(x)
+    y = find(y)
+    
+    if x == y :
+        return
+
+    if x > y :
+        x, y = y, x
+    
+    parents[y] = x
+    candys[x] += candys[y]
+    counts[x] += counts[y]
+
+for _ in range(M) :
+    u, v = map(int, input().split())
+    union(u, v)
+
+items = []
+for i in range(1, N+1) :
+    if i == parents[i] :
+        items.append((counts[i], candys[i]))
+
+dp = [0] * K
+
+for weight, value in items :
+    for w in range(K-1, weight-1, -1) :
+        dp[w] = max(dp[w], dp[w-weight] + value)
+
+print(dp[K-1])
\ No newline at end of file