diff --git a/code_study/Baekjoon/python/23795.py b/code_study/Baekjoon/python/23795.py
new file mode 100644
index 0000000..366c31b
--- /dev/null
+++ b/code_study/Baekjoon/python/23795.py
@@ -0,0 +1,4 @@
+ans = 0
+while (n := int(input())) != -1 :
+    ans += n
+print(ans)
\ No newline at end of file
diff --git a/code_study/Baekjoon/ts/1562.ts b/code_study/Baekjoon/ts/1562.ts
new file mode 100644
index 0000000..bf47339
--- /dev/null
+++ b/code_study/Baekjoon/ts/1562.ts
@@ -0,0 +1,49 @@
+export {};
+const N: number = Number(require("fs").readFileSync(0).toString());
+const MOD: number = 1000000000;
+
+if(N < 10) {
+    console.log(0);
+    process.exit(0);
+}
+
+let dp: number[][][] = Array.from({length : N },
+                 () => Array.from({length : 10}, () => new Array(1024).fill(0)
+                )
+            );
+
+for(let n=1; n<=9; n++) {
+    dp[0][n][1<<n] = 1;
+}
+
+for(let i=1; i<N; i++) {
+    for(let n=0; n<10; n++) {
+        for(let bit_state=0; bit_state < 1024; bit_state++) {
+            if(dp[i-1][n][bit_state] === 0) continue;
+
+            let next_num: number = n+1;
+            let next_bit_state: number = bit_state | (1<<next_num);
+
+            if(next_num < 10) {
+                dp[i][next_num][next_bit_state] += dp[i-1][n][bit_state];
+                dp[i][next_num][next_bit_state] %= MOD;
+            }
+
+            next_num = n-1;
+            next_bit_state = bit_state | (1<<next_num);
+
+            if(next_num >= 0) {
+                dp[i][next_num][next_bit_state] += dp[i-1][n][bit_state];
+                dp[i][next_num][next_bit_state] %= MOD;
+            }
+        }
+    }
+}
+
+let ans: number = 0;
+for(let n=0; n<10; n++) {
+    ans += dp[N-1][n][1023];
+    ans %= MOD;
+}
+
+console.log(ans);
\ No newline at end of file