Submission #631223

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
631223	2022-08-17 21:00:52	abeker	Radio Towers (IOI22_towers)	C++17	100 / 100	2315 ms	229444 KiB

towers

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#include <bits/stdc++.h>
#include "towers.h"
using namespace std;
const int INF = 2e9;
struct Node {
  int cnt;
  Node *l, *r;
  Node(int cnt, Node* l, Node* r) : cnt(cnt), l(l), r(r) {}
  Node() : cnt(0), l(nullptr), r(nullptr) {}
};
class Persistent {
  int offset;
  vector <Node*> root;
  Node* NIL;
public:
  Node* update(Node* x, int lo, int hi, int pos) {
    if (pos < lo || pos >= hi)
      return x;
    if (hi - lo == 1)
      return new Node(x -> cnt + 1, NIL, NIL);
    int mid = lo + (hi - lo) / 2;
    Node* lft = update(x -> l, lo, mid, pos);
    Node* rig = update(x -> r, mid, hi, pos);
    return new Node(lft -> cnt + rig -> cnt, lft, rig);
  }
  Persistent(vector <int> vals) {
    NIL = new Node();
 
 
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Compilation message (stderr)

towers.cpp: In constructor 'Persistent::Persistent(std::vector<int>)':
towers.cpp:37:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |     for (int i = 1; i < vals.size(); i++)
      |                     ~~^~~~~~~~~~~~~
towers.cpp: In function 'void init_sparse()':
towers.cpp:78:52: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   78 |       mini[i][j] = min(mini[i][j - 1], i + (1 << j - 1) > N ? INF : mini[i + (1 << j - 1)][j - 1]);
      |                                                  ~~^~~
towers.cpp:78:86: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   78 |       mini[i][j] = min(mini[i][j - 1], i + (1 << j - 1) > N ? INF : mini[i + (1 << j - 1)][j - 1]);
      |                                                                                    ~~^~~

• Subtask 1: 4 / 4
• Subtask 2: 11 / 11
• Subtask 3: 12 / 12
• Subtask 4: 14 / 14
• Subtask 5: 17 / 17
• Subtask 6: 19 / 19
• Subtask 7: 23 / 23