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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
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https://ideone.com/uXfHJJ
language:
C++14 (gcc 8.3)
created:
233 days ago
visibility:
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