'commit'

TangDou/LanQiaoBei/LanQiao12GuoSai/GS12_2_3.cpp

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+#include <bits/stdc++.h>
+
+using namespace std;
+
+//分解质因数
+const int N = 110;
+
+//欧拉筛
+int primes[N], cnt;     // primes[]存储所有素数
+bool st[N];             // st[x]存储x是否被筛掉
+void get_primes(int n) {
+    for (int i = 2; i <= n; i++) {
+        if (!st[i]) primes[cnt++] = i;
+        for (int j = 0; primes[j] <= n / i; j++) {
+            st[primes[j] * i] = true;
+            if (i % primes[j] == 0) break;
+        }
+    }
+}
+
+int main() {
+    int n;
+    cin >> n;
+    get_primes(n);
+    int c = 0;
+    for (int i = 0; i < cnt; i++) {
+        while (n % primes[i] == 0) {
+            n /= primes[i];
+            cout << primes[i] << " ";
+            c++;
+        }
+    }
+    cout << endl;
+    cout << c << endl;
+    return 0;
+}