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  1. #include <iostream>
  2. #include <bits/stdc++.h>
  3. #define Kirlos ios_base::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr);
  4. #define ll long long
  5. #define pb(k) push_back(k)
  6. #define fi first
  7. #define se second
  8. #define endl '\n'
  9. #define mp(x,y) make_pair(x,y)
  10. #define MOD 1000000007
  11. #define all(x) x.begin(), x.end()
  12. #define PI acos(-1)
  13. #define sin(x) sin((x)*PI/180)
  14. #define cos(x) cos((x)*PI/180)
  15. #define tan(x) tan((x)*PI/180)
  16. #define Ones(x) __builtin_popcountll(x)
  17.  
  18. using namespace std;
  19.  
  20. void solve()
  21. {
  22. int n,k,q;
  23. cin>>n>>k>>q;
  24. vector<int>pre(200005);
  25. while(n--)
  26. {
  27. int l,r;
  28. cin>>l>>r;
  29. pre[l]++;
  30. pre[r+1]--;
  31. }
  32. for(int i=1; i<200005; i++)
  33. {
  34. pre[i]+=pre[i-1];
  35. }
  36. vector<int>freq(200005);
  37. for(int i=1; i<200005; i++)
  38. {
  39. if(pre[i]>=k)
  40. {
  41. freq[i]=1;
  42. }
  43. }
  44. for(int i=1; i<200005; i++)
  45. {
  46. freq[i]+=freq[i-1];
  47. }
  48. while(q--)
  49. {
  50. int l,r;
  51. cin>>l>>r;
  52. cout<<freq[r]-freq[l-1]<<endl;
  53. }
  54. }
  55.  
  56. int main()
  57. {
  58. Kirlos
  59. ll t;
  60. t=1;
  61. //cin>>t;
  62. while(t--)
  63. {
  64. solve();
  65. }
  66. return 0;
  67. }
Success #stdin #stdout 0.01s 5532KB
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