new file: B3622.cpp

B3622.cpp

@@ -0,0 +1,30 @@
+// 92
+#include <cstdio>
+using namespace std;
+bool ch[20];
+int n;
+void dfs(int now)
+{
+    if (now > n)
+    {
+        for (int i = 1; i <= n; ++i)
+        {
+            if (ch[i])
+                printf("Y");
+            else
+                printf("N");
+        }
+        puts("");
+        return;
+    }
+    ch[now]=0;
+    dfs(now + 1);
+    ch[now]=1;
+    dfs(now + 1);
+}
+int main()
+{
+    scanf("%d", &n);
+    dfs(1);
+    return 0;
+}