new file: P11375.cpp

P11375.cpp

@@ -0,0 +1,41 @@
+#include <bits/stdc++.h>
+using namespace std;
+#define int long long
+int n, s, t;
+int inf = 1e12;
+string str;
+signed main()
+{
+    cin >> n >> s;
+    cin >> str;
+    for (auto i : str)
+    {
+        if (i == 'U')
+        {
+            if (s == 1)
+                continue;
+            if (t)
+            {
+                t--;
+                continue;
+            }
+            s /= 2;
+        }
+        if (i == 'L')
+        {
+            if (2 * s > inf)
+                t++;
+            else
+                s *= 2;
+        }
+        else if (i == 'R')
+        {
+            if (2 * s + 1 > inf)
+                t++;
+            else
+                s = s * 2 + 1;
+        }
+    }
+    cout << s << endl;
+    return 0;
+}