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  1. /**
  2.  *    author:  orzvanh14 (  )
  3.  *    created: 23.12.2022 10:08:02
  4.  *    too lazy to update time
  5. **/
  6. // i wants to take ioi
  7. //binhtinhtutinkhongcaycunhungmotkhikhongcontutinnualatuyetvong
  8. #include <bits/stdc++.h>
  9.  
  10. using namespace std;
  11.  
  12. #define int long long
  13. #define nn "\n"
  14. #define pi pair<int, int>
  15. #define fi first
  16. #define se second
  17. #define lb lower_bound
  18. #define ub upper_bound
  19. #define eb emplace_back
  20. #define pb push_back
  21. #define TASK " "
  22.  
  23. #define ms(a, x) memset(a, x, sizeof(a))
  24. #define all(a) a.begin(), a.end()
  25. #define All(a, n) a + 1, a + 1 + n
  26.  
  27. #define LOG 19
  28.  
  29.  
  30. const int INF = 1e18;
  31. const int mod = 1e9+7;
  32. const int N = 1e6  + 5;
  33. const int maxN = 2e5 + 3;
  34. int MOD = 998244353;
  35. int bit[200000];
  36. struct node{
  37. 	int kc, u, hk;
  38. 	bool operator<(const node& other) const {
  39.         return kc > other.kc;
  40.     }
  41. };
  42. struct edge{
  43. 	int v, w, h;
  44. };
  45.  
  46. void nhap(){
  47.  
  48. }
  49. void solve(){
  50.     int n; cin >> n;
  51.     int ans = 0;
  52.     for(int i = 2; i * i <= n; i++){
  53.         if(n % i == 0){
  54.             ans = i;
  55.             while(n % i == 0){
  56.                 n /= i;
  57.             }
  58.         }
  59.     }
  60.     if(n > 1){
  61.         ans = n;
  62.     }
  63.     cout << ans << nn;
  64. }
  65. signed main() {
  66. 	// freopen("uocnt.inp", "r", stdin);
  67. 	// freopen("uocnt.out", "w", stdout);
  68. 	ios_base::sync_with_stdio(0);
  69. 	cin.tie(0);
  70. 	cout.tie(0);
  71. //    int t;
  72. //    cin >> t;
  73. //    while(t--) solve();
  74.     solve();
  75. 	return 0;
  76.  
  77. }
  78.  
Success #stdin #stdout 0.01s 5296KB
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https://ideone.com/4SW2QO
language:
C++14 (gcc 8.3)
created:
18 hours ago
visibility:
public

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