diff --git a/OnlineJudges/lydsy/1012.cpp b/OnlineJudges/lydsy/1012.cpp
new file mode 100644
index 0000000..7168404
--- /dev/null
+++ b/OnlineJudges/lydsy/1012.cpp
@@ -0,0 +1,18 @@
+#include <cstdio>
+int m, d, l, q, sz, a[200001], maxa[200001];
+char ch;
+int main()
+{
+    scanf("%d%d", &m, &d);
+    while (m-- && ~scanf("%s%d", &ch, &q))
+        if (ch == 'A')
+        {
+            a[++sz] = (l + q) % d;
+            for (int i = sz; i; i--)
+                if (a[sz] > maxa[i]) maxa[i] = a[sz];
+                else break;
+        }
+        else
+            printf("%d\n", l = maxa[sz - q + 1]);
+    return 0;
+}
\ No newline at end of file