'commit'

TangDou/AcWing/HighPrecision/P1009_2.cpp

@@ -0,0 +1,16 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int main() {
+    int s = 0;
+    // 1!+2!+3!+4!+5!
+    int f = 1;
+    for (int i = 1; i <= 5; i++) {
+        f *= i; // 阶乘
+        s += f;
+    }
+
+    cout << s << endl;
+    return 0;
+}