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  1. /*Recursive Segment tree for competitive programing*/
  2.  
  3. #include <iostream>
  4. #include <vector>
  5.  
  6. using namespace std;
  7.  
  8. struct Segment{
  9. vector <long long> st;
  10. vector <long long> dt;
  11. int sz;
  12. void build(int p , int l, int r){
  13. if(l==r){
  14. st[p] = l;
  15. }
  16. else{
  17. int mid = (l+r)>>1;
  18. int left = p<<1;
  19. build(left, l, mid);
  20. build(left+1, mid + 1 , r);
  21. int p1 = st[left] , p2 = st[left+1];
  22. st[p] = (dt[p1] <= dt[p2]) ? p1 : p2;
  23. }
  24. }
  25.  
  26. Segment(const vector<long long> &data){
  27. sz = data.size();
  28. st.assign(3*sz,0);
  29. dt = data;
  30. build(1,0,sz-1);
  31. }
  32.  
  33. int query(int p, int l, int r, int &i, int &j){
  34. if(i>r || j< l)
  35. return -1;
  36. else if(i<= l && j>=r){
  37. return st[p];
  38. }
  39. else{
  40. int left = p<<1;
  41. int mid = (l+r)>>1;
  42. int lf = query(left, l, mid, i, j);
  43. int rg = query(left + 1, mid+1, r, i, j);
  44. if(lf == -1) return rg;
  45. if(rg == -1) return lf;
  46. return dt[lf] < dt[rg] ? lf : rg;
  47. }
  48. }
  49.  
  50. int update(int p, int l, int r, int id, int v){
  51. if(l==r)
  52. return st[p] = l;
  53. else{
  54. int rg = (l+r)/2 +1;
  55. rg <= id ? update(p*2+1, rg, r,id, v) : update(p*2, l, (l+r)/2,id, v);
  56. st[p] = dt[st[p*2]] < dt[st[p*2+1]] ? st[p*2] : st[p*2+1];
  57. }
  58. }
  59.  
  60. void update(int p, int v){
  61. dt[p] = v;
  62. update(1,0,sz-1,p,v);
  63. }
  64.  
  65. long long query(int &i, int &j){
  66. int ans = query(1, 0, sz-1, i, j);
  67. return dt[ans];
  68. }
  69. };
  70.  
  71. int main(){
  72. //std::ios::sync_with_stdio(false);
  73.  
  74. int t,nl =0;
  75. scanf("%d",&t);
  76. while(t--){
  77. //cout<<"Scenario #"<<++nl<<":\n";
  78. printf("Scenario #%d:\n",++nl);
  79. vector<long long> data(100005);
  80. int n,q,i,j;
  81. scanf("%d",&n);
  82.  
  83. for(int i=0; i<n; i++)
  84. scanf("%lld",&data[i]);
  85. //cin>>data[i];
  86.  
  87.  
  88. Segment sg(data);
  89.  
  90. //cin>>q;
  91. scanf("%d",&q);
  92.  
  93. while(q--){
  94. //cin>>i>>j;
  95. scanf("%d%d",&i,&j);
  96. //cout<<sg.query(i,j)<<"\n";
  97. printf("%lld\n",sg.query(i,j));
  98. }
  99. }
  100. }
  101.  
Runtime error #stdin #stdout 0s 19576KB
stdin
Standard input is empty
stdout
Scenario #1:
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