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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. typedef long long ll;
  4. #define pb push_back
  5. #define F first
  6. #define S second
  7. #define all(v) v.begin(),v.end()
  8. #define P pair
  9. #define V vector
  10. const long long MOD = 1000000007; // 1e9 + 7
  11.  
  12. long long mod(long long a, long long b) {
  13. return (a % b + b) % b;
  14. }
  15. void file(){
  16. freopen("input.txt.txt","r",stdin);
  17. freopen("output.txt.txt","w",stdout);
  18. }
  19. int maxer(int a,int b,int c){
  20. return max(a,max(b,c));
  21. }
  22. void setio(string s) {
  23. freopen((s + ".in").c_str(), "r", stdin);
  24. freopen((s + ".out").c_str(), "w", stdout);
  25. }
  26.  
  27. bool issorted(int n,int A[]){
  28. for(int i=0;i<n-1;i++){
  29. if(A[i+1]<A[i])
  30. return false;
  31. }
  32. return true;
  33. }
  34. void dfs(int x,vector<int>graph[],vector<bool>&visited,vector<int>&vp) {
  35. if (visited[x])return;
  36. visited[x] = true;
  37. vp.pb(x);
  38. for (auto u: graph[x])
  39. dfs(u, graph, visited, vp);
  40. }
  41. vector<ll>divisors(ll n){
  42. vector<ll>ans;
  43. for(ll i=1;i*i<=n;i++){
  44. if(i*i==n){
  45. ans.pb(i);
  46. continue;
  47. }
  48. if(n%i==0){
  49. ans.pb(i);
  50. ans.pb(n/i);
  51. }
  52. }
  53. return ans;
  54. }
  55. bool check(ll m,const ll A[],ll k){
  56. return k>=A[m];
  57. }
  58. struct segtree {
  59. int size;
  60. V<int> maxer;
  61.  
  62. void init(int n) {
  63. size = 1;
  64. while (size < n)size *= 2;
  65. maxer.assign(2 * size, INT_MIN);
  66. }
  67.  
  68. void set(int i, int v) {
  69. i += size;
  70. maxer[i] = v;
  71. for (i /= 2; i >= 1; i /= 2)
  72. maxer[i] = max(maxer[2 * i], maxer[2 * i + 1]);
  73. }
  74.  
  75. int result(int x) {
  76. int search = 1;
  77. while (search < size) {
  78. if (maxer[2 * search] >= x) {
  79. search = 2 * search;
  80. } else if (maxer[2 * search + 1] >= x) {
  81. search = 2 * search + 1;
  82. } else
  83. return -1;
  84. }
  85. return search - size;
  86. }
  87. };
  88. void solve() {
  89. int n, q;
  90. cin >> n >> q;
  91. segtree st;
  92. st.init(n);
  93. for (int i = 0; i < n; i++) {
  94. int x;
  95. cin >> x;
  96. st.set(i, x);
  97. }
  98. while (q--) {
  99. int t;
  100. cin >> t;
  101. if (t == 1) {
  102. int i, v;
  103. cin >> i >> v;
  104. st.set(i, v);
  105. } else {
  106. int x;
  107. cin >> x;
  108. cout << st.result(x) << endl;
  109. }
  110. }
  111. }
  112.  
  113.  
  114. int main(){
  115. //file();
  116. solve();
  117. return 0;
  118. }
Runtime error #stdin #stdout 0.08s 5308KB
stdin
Standard input is empty
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