Add FZOI Codes

FZOI/数的组合.cpp

@@ -0,0 +1,38 @@
+#include <iostream>
+#include <vector>
+#include <string>
+#define int long long
+
+using namespace std;
+
+int m, cnt = 0;
+
+void f(int n, vector<int>& vt, int start) {
+    if (n == 0) {
+        cout << m << "=" << vt[0];
+        for (int i = 1; i < vt.size(); i++) {
+            cout << "+" << vt[i];
+        }
+        cout << endl ;
+        cnt ++ ;
+    } else {
+        for (int i = start; i >= 1; i--) {
+            if (n >= i) {
+                vt.push_back(i);
+                f(n - i, vt, i);
+                vt.pop_back();
+            }
+        }
+    }
+}
+
+signed main() {
+    cin >> m;
+
+    vector<int> vt;
+    f(m, vt, m - 1);
+
+    cout << "total=" << cnt << endl;
+
+    return 0;
+}