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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define ll long long
  4. #define fi first
  5. #define se second
  6. #define MOD 1000000007
  7. #define FOR(i,a,b) for (int i = (a);i <= (b);i++)
  8. #define FOD(i,a,b) for (int i = (b);i >= (a);i--)
  9. #define ALL(x) (x).begin(),(x).end()
  10. #define ii pair<ll,ll>
  11. #define iii pair<int,pair<int,int>>
  12. //const int MOD = 998244353;
  13. const int MAXN = 1e5 + 7;
  14. int random(int l,int r){
  15.     return l + rand() % (r - l + 1);
  16. }
  17. int Pow(int a,int b,int mod){
  18.     if (b == 1)return a;
  19.     ll x = Pow(a,b / 2,mod);
  20.     if (b & 1)return x * x % mod * a % mod;
  21.     return x * x % mod;
  22. }
  23. bool prime(int n){
  24.     if (n == 2)return true;
  25.     FOR(i,1,1){
  26.         int x = random(2,n - 1);
  27.         if (Pow(x,n - 1,n) != 1)return false;
  28.     }
  29.     return true;
  30. }
  31. int check(int n){
  32.     if (prime(n))return 2;
  33.     int ans = 1;
  34.     FOR(i,2,(int)sqrt(n))if (n % i == 0){
  35.         int res = 1;
  36.         while(n % i == 0){
  37.             res++;
  38.             n = n / i;
  39.         }
  40.         ans = ans * res;
  41.     }
  42.     if (n > 1)ans = ans * 2;
  43.     return ans;
  44. }
  45. int main(){
  46.     ios_base::sync_with_stdio(false);
  47.     cin.tie(0); cout.tie(0);
  48.     //freopen("MRG.INP","r",stdin);
  49.     //freopen("MRG.OUT","w",stdout);
  50.     srand(time(NULL));
  51.     int l,r;cin >> l >> r;
  52.     int q = 0,k,t,cnt = 0;
  53.     FOR(i,l,r){
  54.         cnt++;
  55.         if (cnt == 10000)break;
  56.         int res = check(i);
  57.         if (res > q){
  58.             q = res;
  59.             k = i;t = 0;
  60.         }
  61.         if (res == q)t++;
  62.     }
  63.     cout << q << ' ' << k << ' ' << t;
  64.     return 0^0;
  65. }
Success #stdin #stdout 0.23s 5288KB
comments (?)
stdin
copy 
999000000 1000000000
stdout
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512 999001080 1
https://ideone.com/slsFqN
language:
C++ (gcc 8.3)
created:
3 days ago
visibility:
public

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