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  1. #include<bits/stdc++.h>
  2. #define ll long long
  3. using namespace std;
  4. ll a,b,t,d[1000006];
  5. int main()
  6. {
  7.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  8.     freopen("SBD.inp", "r", stdin);
  9.     freopen("SBD.out", "w", stdout);
  10.     memset(d,0,sizeof d);
  11.     for(int i = 1; i <= 1000000; i++)
  12.     {
  13.         d[i] = d[i-1];
  14.         if(i%3 == 0)
  15.         {
  16.             ll t = i,uc = 1;
  17.             for(int j = 2; j <= sqrt(t) ;j++)
  18.             {
  19.                 if(t%j == 0)
  20.                 {
  21.                     ll dem = 0;
  22.                     while(t%j == 0)
  23.                     {
  24.                         dem++;
  25.                         t/=j;
  26.                     }
  27.                     uc = uc*(dem+1);
  28.                 }
  29.             }
  30.             if(t > 1)
  31.                 uc*=2;
  32.             if(uc == 9)
  33.                 d[i]++;
  34.         }
  35.     }
  36.     cin >> t;
  37.     while(t--)
  38.     {
  39.         cin >> a >> b;
  40.         cout << d[b] - d[a-1] << '\n';
  41.     }
  42. }
  43.  
Success #stdin #stdout 0.59s 11712KB
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https://ideone.com/eGmVsZ
language:
C++14 (gcc 8.3)
created:
7 days ago
visibility:
public

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