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  1. /*
  2.  * Created on: 18-October-2019
  3.  * Author: ankur314
  4.  */
  5. #include <bits/stdc++.h>
  6. #define lli long long int
  7. #define li long int
  8. #define db double
  9. #define ldb long double
  10. #define vr vector
  11. #define it iterator
  12. #define fi(i,a,n) for(int i=a;i<n;i++)
  13. #define fli(i,a,n) for(long int i=a;i<n;i++)
  14. #define flli(i,a,n) for(long long int i=a;i<n;i++)
  15. #define pb(n) push_back(n)
  16. #define ppf() pop_front()
  17. #define pii pair<int,int>
  18. #define MOD 1000000007
  19.  
  20. #define debug1(x) cout<<x<<"\n"
  21. #define debug2(x,y) cout<<x<<" "<<y<<"\n"
  22. #define debug3(x,y,z) cout<<x<<" "<<y<<" "<<z<<"\n"
  23. #define debug4(x,y,z,w) cout<<x<<" "<<y<<" "<<z<<" "<<w<<"\n"
  24.  
  25. using namespace std;
  26.  
  27. struct bag{
  28. int l, r, v;
  29. };
  30.  
  31. bool comp(bag a, bag b)
  32. {
  33. if(a.v != b.v)
  34. {
  35. return (a.v < b.v);
  36. }
  37. else
  38. {
  39. if(a.l != b.l)
  40. {
  41. return (a.l < b.l);
  42. }
  43. else
  44. {
  45. return (a.r < b.r);
  46. }
  47. }
  48. }
  49.  
  50. int main(){
  51. ios_base::sync_with_stdio(false);cin.tie(NULL);
  52. /*freopen("input.txt","r",stdin);
  53.   freopen("output.txt","w",stdout);*/
  54. int t; cin>>t;
  55. while(t--)
  56. {
  57. int n; cin>>n;
  58. bag a[n];
  59. fi(i,0,n)
  60. {
  61. int l1, r1, v1;
  62. cin>>l1>>r1>>v1;
  63. a[i].l = l1;
  64. a[i].r = r1;
  65. a[i].v = v1;
  66. }
  67. sort(a, a+n, comp);
  68. bool ok = true;
  69. int prev1 = -1;
  70. bag prev;
  71. prev.l = -1;prev.r = -1;prev.v = -1;
  72. fi(i,0,n-1)
  73. {
  74. if(a[i].v != prev1)
  75. {
  76. prev1 = a[i].v;
  77. if(a[i+1].v != prev1)
  78. {
  79. continue;
  80. }
  81. prev.l = -1;prev.r = -1;prev.v = -1;
  82. if(a[i].r >= a[i+1].l)
  83. {
  84. if(prev.l != -1)
  85. {
  86. if(prev.r >= a[i+1].l)
  87. {
  88. ok = false;
  89. break;
  90. }
  91. }
  92. prev = a[i];
  93. }
  94. }
  95. else
  96. {
  97. prev1 = a[i].v;
  98. if(a[i+1].v != prev1)
  99. {
  100. continue;
  101. }
  102. if(a[i].r >= a[i+1].l)
  103. {
  104. if(prev.l != -1)
  105. {
  106. if(prev.r >= a[i+1].l)
  107. {
  108. ok = false;
  109. break;
  110. }
  111. }
  112. prev = a[i];
  113. }
  114. }
  115. }
  116. if(ok)
  117. {
  118. cout<<"YES\n";
  119. }
  120. else
  121. {
  122. cout<<"NO\n";
  123. }
  124. }
  125. return 0;
  126. }
Runtime error #stdin #stdout 0s 4320KB
stdin
Standard input is empty
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