'commit'

TangDou/LanQiaoBei/LanQiao12XuanBaSaiZhongJi/5.cpp

@@ -0,0 +1,30 @@
+#include <iostream>
+
+using namespace std;
+int n, m;
+const int N = 110;
+int res;
+int a[N];
+
+void dfs(int u) {
+    if (u == n + 1) {
+        int sum = 0;
+        for (int i = 1; i <= n; i++) sum += a[i];
+        if (sum == m) {
+            res++;
+        }
+        return;
+    }
+    for (int i = a[u - 1]; i >= 1; i--) {
+        a[u] += i;
+        dfs(u + 1);
+        a[u] -= i;
+    }
+}
+int main() {
+    cin >> n >> m;
+    a[0] = m;
+    dfs(1);
+    cout << res << endl;
+    return 0;
+}