Josif_tepe

Untitled

Mar 16th, 2026
220
0
Never
Not a member of Pastebin yet? Sign Up, it unlocks many cool features!
C++ 1.23 KB | None | 0 0
  1. #include <iostream>
  2. #include <vector>
  3. using namespace std;
  4. typedef long long ll;
  5. const int maxn = 2e5 + 10;
  6. const ll INF = 1e18;
  7. int n;
  8. int a[maxn];
  9. ll segment_tree[3 * maxn];
  10.  
  11. ll merge_nodes(ll A, ll B) {
  12.     return min(A, B);
  13. }
  14.  
  15. void build_tree(int L, int R, int node) {
  16.     if(L == R) {
  17.         segment_tree[node] = a[L];
  18.     }
  19.     else {
  20.         int middle = (L + R) / 2;
  21.         build_tree(L, middle, 2 * node);
  22.         build_tree(middle + 1, R, 2 * node + 1);
  23.         segment_tree[node] = merge_nodes(segment_tree[2 * node], segment_tree[2 * node + 1]);
  24.     }
  25. }
  26.  
  27.  
  28. ll query(int i, int j, int L = 0, int R = n - 1, int node = 1) {
  29.     if(R < i or j < L) {
  30.         return INF;
  31.     }
  32.     if(i <= L and R <= j) {
  33.         return segment_tree[node];
  34.     }
  35.    
  36.     int middle = (L + R) / 2;
  37.     return merge_nodes(query(i, j, L, middle, 2 * node), query(i, j, middle + 1, R, 2 * node + 1));
  38. }
  39.  
  40. int main() {
  41.     int k;
  42.     cin >> n >> k;
  43.    
  44.     for(int i = 0; i < n; i++) {
  45.         cin >> a[i];
  46.     }
  47.    
  48.     build_tree(0, n - 1, 1);
  49.    
  50.     for(int i = 0; i < k; i++) {
  51.         int x, y;
  52.         cin >> x >> y;
  53.        
  54.         cout << query(x - 1, y - 1) << endl;
  55.     }
  56.    
  57.     return 0;
  58. }
  59.  
Advertisement
Add Comment
Please, Sign In to add comment