diff --git a/P1015.cpp b/P1015.cpp
new file mode 100644
index 0000000..3a888e4
--- /dev/null
+++ b/P1015.cpp
@@ -0,0 +1,50 @@
+#include <cstdio>
+#include <cstring>
+#define maxl 1000
+int n, a[maxl], l;
+char m[maxl], dm[maxl];
+void plus()
+{
+    for (int i = 0; i < l; i++)
+        dm[l - i - 1] = m[i];
+    l++;
+    for (int i = 0; i < l; i++)
+    {
+        m[i] += dm[i];
+        if (m[i] >= n)
+            m[i + 1]++, m[i] -= n;
+    }
+    while (!m[l - 1])
+        --l;
+    return;
+}
+bool hw()
+{
+    for (int i = 0; i < l; i++)
+        if (m[i] != m[l - 1 - i])
+            return 0;
+    return 1;
+}
+int main()
+{
+    scanf("%d%s", &n, m);
+    l = strlen(m);
+    for (int i = 0; i < l; i++)
+        if (m[i] >= '0' && m[i] <= '9')
+            m[i] -= '0';
+        else
+            m[i] = m[i] - 'A' + 10;
+    int step = 0;
+    while (!hw())
+    {
+        step++;
+        if (step > 30)
+            break;
+        plus();
+    }
+    if (step <= 30)
+        printf("STEP=%d\n", step);
+    else
+        puts("Impossible!");
+    return 0;
+}