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#include <bits/stdc++.h>
using namespace std;
int main() {
int n;
cin >> n;//输入这个数
for (int i = 2; i <= n; i++)//用for循环查找最小的因数
if (n % i == 0)//如果i是n的因数
{
cout << n / i;//输出较大的因数
break;//跳出循环
}
return 0;
}