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  1. #include <iostream>
  2. #include <string>
  3. #include <algorithm>
  4. #include <cmath>
  5. #include <climits>
  6. #include <iomanip>
  7. #include <vector>
  8.  
  9. using namespace std;
  10. // P.Moriarty //
  11. #define AAD ios_base::sync_with_stdio(0); cin.tie(nullptr); cout.tie(nullptr);
  12. long long fac(int n)
  13. {
  14. long long fact = 1;
  15. for (int i = 1;i <= n;i++)
  16. {
  17. fact *= i;
  18. }
  19. return fact;
  20. }
  21. long long per(int n, int j)
  22. {
  23. long long p = 1;
  24. for (int i = n; i > n - j; i--)
  25. {
  26. p *= i;
  27. }
  28. return p;
  29. }
  30. bool lucky(int ch)
  31. {
  32. bool l = true;
  33.  
  34. while (ch > 0)
  35. {
  36. int d = ch % 10;
  37. if (d == 7 || d == 4)
  38. {
  39. ch /= 10;
  40. }
  41. else
  42. {
  43. l = false;
  44. break;
  45. }
  46. }
  47.  
  48. return l;
  49.  
  50. }
  51. int pro(int x, int i)
  52. {
  53. int r = 1;
  54. for (int j = 1;j <= i;j++)
  55. {
  56. r *= x;
  57. }
  58. return r;
  59. }
  60.  
  61. bool prime(int x) {
  62. if (x <= 1) return false;
  63. if (x == 2 || x == 3) return true;
  64. if (x % 2 == 0 || x % 3 == 0) return false;
  65.  
  66. for (int i = 5; i <= sqrt(x); i += 6) {
  67. if (x % i == 0 || x % (i + 2) == 0) return false;
  68. }
  69.  
  70. return true;
  71. }
  72.  
  73. int f(string a, string b)
  74. {
  75. int c = 0;
  76. for (int i = 0;i < a.size();i++)
  77. {
  78. if (a[i] == b[i])
  79. c++;
  80. }
  81. return c;
  82. }
  83.  
  84. int main()
  85. {
  86. AAD;
  87. int n;
  88. cin >> n;
  89.  
  90. vector<pair<long long, long long>> p(n);
  91. for (int i = 0; i < n; i++) {
  92. cin >> p[i].first >> p[i].second;
  93. }
  94.  
  95. sort(p.begin(), p.end());
  96. long long l = p[0].first, r = p[0].second;
  97. vector<pair<long long, long long>> result;
  98. for (int i = 1; i < n; i++)
  99. {
  100. if (l <= p[i].first && r >= p[i].first && r < p[i].second)
  101. {
  102. r = p[i].second;
  103. }
  104. else
  105. {
  106. result.push_back(pair<long long, long long>(l, r));
  107. l = p[i].first;
  108. r = p[i].second;
  109.  
  110. }
  111.  
  112. }
  113. for (int i = 0; i < result.size(); ++i) {
  114. cout << result[i].first << " " << result[i].second << endl;
  115. }
  116. cout << l << " " << r << endl;
  117.  
  118. }
  119.  
  120.  
  121.  
  122.  
  123.  
  124.  
Success #stdin #stdout 0.02s 5316KB
stdin
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