From 8bd714bc2b43c4bd9340caba089db0e67810f34e Mon Sep 17 00:00:00 2001
From: hanyixuanten <hanyixuanten@outlook.com>
Date: Fri, 14 Aug 2026 10:05:34 +0800
Subject: [PATCH] new file:   7.cpp

---
 7.cpp | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 7.cpp

diff --git a/7.cpp b/7.cpp
new file mode 100644
index 0000000..b75c46c
--- /dev/null
+++ b/7.cpp
@@ -0,0 +1,30 @@
+// 93
+#include <cstdio>
+using namespace std;
+bool ch[50];
+int n, m;
+void dfs(int count, int now)
+{
+    if (now > n)
+    {
+        if (count != m)
+            return;
+        for (int i = 1; i <= n; ++i)
+        {
+            if (ch[i])
+                printf("%d ", i);
+        }
+        puts("");
+        return;
+    }
+    ch[now] = 1;
+    dfs(count + 1, now + 1);
+    ch[now] = 0;
+    dfs(count, now + 1);
+}
+int main()
+{
+    scanf("%d%d", &n, &m);
+    dfs(0, 1);
+    return 0;
+}
\ No newline at end of file