'commit'

TangDou/AcWing_TiGao/T5/FenJieZhiYinShu/197_BruteForce.cpp

@@ -0,0 +1,22 @@
+#include <bits/stdc++.h>
+using namespace std;
+typedef long long LL;
+
+int n;
+bool prime(int x) {
+    if (x == 2) return 1;
+    for (int i = 2; i * i <= x; i++)
+        if (x % i == 0) return 0;
+    return 1;
+}
+int main() {
+    cin >> n;
+    for (int i = 2; i <= n; i++) {
+        if (!prime(i)) continue;
+        LL x = i;
+        int ans = 0;
+        while (x <= n) ans += n / x, x *= i;
+        printf("%d %d\n", i, ans);
+    }
+    return 0;
+}