func_code_string: #include <bits/stdc++.h>   using namespace std;   ofstream fo( test.out );   ifstream fi( test.inp );   int n, m, k, dem;   int x[200005], y[200005];   int main() {     long long a;     cin >> a;     for (long long i = 2; i * i <= a; i++) {       while (a % (i * i) == 0) a /= i;     }     cout << a;   }   