some programs!!

cs101/dh_01_04.cpp

@@ -0,0 +1,37 @@
+#include <iostream>
+#include <vector>
+
+using namespace std;
+
+vector<int> calc_factors( int num) {
+    vector<int> factors;
+    for (const int factor : {3,5,7}) {
+        if (num % factor == 0) {
+            factors.push_back(factor);
+        }
+    }
+    return factors;
+}
+
+int num;
+vector<int> factors;
+
+int main() {
+    ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+
+    cin >> num;
+    factors = calc_factors(num);
+    if (factors.empty()) {
+        cout << "n" << endl;
+    } else {
+        int temp = factors[factors.size() - 1];
+        factors.pop_back();
+        for (const int factor : factors) {
+            cout << factor << " ";
+        }
+        cout << temp << endl;
+    }
+
+    return 0;
+}