diff --git a/AtCoder/ABC257/B/B.cpp b/AtCoder/ABC257/B/B.cpp
new file mode 100644
index 00000000..8cdb626f
--- /dev/null
+++ b/AtCoder/ABC257/B/B.cpp
@@ -0,0 +1,43 @@
+#include <iostream>
+
+using std::cin;
+using std::cout;
+const char endl = '\n';
+
+const int N = 205;
+
+int n, k, q, a[N];
+bool s[N];
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    cin >> n >> k >> q;
+
+    for (int i = 1; i <= k; i++) {
+        cin >> a[i];
+
+        s[a[i]] = true;
+    }
+
+    while (q--) {
+        int x;
+
+        cin >> x;
+
+        if (a[x] < n && !s[a[x] + 1]) {
+            s[a[x]] = false;
+            s[a[x] + 1] = true;
+            a[x]++;
+        }
+    }
+
+    for (int i = 1; i <= k; i++) {
+        cout << a[i] << ' ';
+    }
+
+    cout << endl;
+
+    return 0;
+}