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  1. #include        <bits/stdc++.h>
  2. using namespace std;
  3. #define ll long long
  4.  
  5. //Build tree for minimum
  6. void build_tree(ll int *a, ll int s,ll int e, ll int *tree, ll int index)
  7. {
  8. 	if(s==e)
  9. 	{
  10. 		tree[index] = a[s];
  11. 		return;
  12. 	}
  13. 	ll int mid = (s+e)/2;
  14. 	build_tree(a,s,mid,tree,2*index);
  15. 	build_tree(a,mid+1,e,tree,2*index+1);
  16. 	tree[index] = min(tree[2*index],tree[2*index+1]);
  17. 	return;
  18. }
  19. //Query for find min element
  20. int query(ll int *tree,ll int ss,ll int se,ll int qs,ll int qe ,ll int index)
  21. {
  22. 	//complete overlap
  23. 	if(ss>=qs and se<=qe)
  24. 	{
  25. 		return tree[index];
  26. 	}
  27. 	//No Overlap
  28. 	if(qe<ss || qs>se)
  29. 	return INT_MAX;
  30.  
  31. 	//partial overlap
  32. 	ll int mid = (ss + se)/2;
  33. 	ll int left = query(tree,ss,mid,qs,qe,2*index);
  34. 	ll int right = query(tree,mid+1,se,qs,qe,2*index+1);
  35. 	return min(left,right);
  36. }
  37. //point update
  38. void point_update(ll int *tree, ll int ss,ll int se, ll int i,ll int inc,ll int index)
  39. {
  40. 	if(i>se || i<ss)
  41. 	return;
  42. 	if(ss == se)
  43. 	{
  44. 		tree[index] = inc;
  45. 		return;
  46. 	}
  47. 	ll int mid = (ss + se)/2;
  48. 	point_update(tree,ss,mid,i,inc,2*index);
  49. 	point_update(tree,mid+1,se,i,inc,2*index+1);
  50. 	tree[index] = min(tree[2*index],tree[2*index+1]);
  51. 	return;
  52. }
  53.  
  54. void solve()
  55. {
  56. 	int n,q;
  57. 	cin>>n>>q;
  58.  
  59. 	ll a[n];
  60. 	for(int i=0;i<n;i++)
  61. 	cin>>a[i];
  62. 	ll tree[4*n+1]={0};
  63. 	build_tree(a,0,n-1,tree,1);
  64.  
  65.  
  66. 	while(q--)
  67. 	{
  68. 		ll num,l,r;
  69. 		cin>>num>>l>>r;
  70. 		if(num==1)
  71. 		{
  72. 			point_update(tree,0,n-1,l,r,1);
  73.  
  74. 		}
  75. 		else
  76. 		cout<<query(tree,0,n-1,l,r-1,1)<<endl;
  77.  
  78. 	}
  79.  
  80. }
  81. int main()
  82. {
  83. 	ios_base::sync_with_stdio(false); 
  84.     	cin.tie(NULL); 
  85.     ll int t=1;
  86. 	 // cin>>t;
  87. 	while(t--)
  88. 	{  
  89.       solve();
  90.     }
  91.  
  92. 	return 0;
  93. }
  94.  
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.cpp:62:10: error: variable-sized object may not be initialized
        ll tree[4*n+1]={0};
                ^~~~~
1 error generated.
stdout
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Standard output is empty
https://ideone.com/CInxCo
language:
C++14 (clang 8.0)
created:
3 years ago
visibility:
public

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