Submission #891812

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
891812	2023-12-24 05:24:58	Trisanu_Das	Rectangles (IOI19_rect)	C++17	100 / 100	836 ms	274436 KiB

rect

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#include "rect.h"
#include <bits/stdc++.h>
using namespace std;
 
int n, m;
int bit[2505];
int a[2][2505][2505], lst[2][2505][2505], cnt[2][2505][2505];
vector<pair<int, int> > p[2]; 
vector<int> s[2][2505];
 
void upd(int idx, int val){
  for(idx++; idx < 2505; idx += (idx & -idx)) bit[idx] += val;
}
 
int qry(int idx){
  int ans = 0;
  for(idx++; idx; idx -= (idx & -idx)) ans += bit[idx];
  return ans;
}
 
long long count_rectangles(vector<vector<int>> A) {
  n = A.size(), m = A[0].size();
  for(int i = 0; i < n; i++) s[0][i].push_back(0);
  for(int i = 0; i < m; i++) s[1][i].push_back(0);
  long long ans = 0;
  for(int i = 0; i < n - 1; i++){
      for(int j = 0; j < m - 1; j++){
          a[0][i][j] = a[1][j][i] = A[i][j];
          a[0][i][j + 1] = A[i][j + 1];
          a[1][j][i + 1] = A[i + 1][j];
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

rect.cpp: In function 'long long int count_rectangles(std::vector<std::vector<int> >)':
rect.cpp:52:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |               for(; it < p[1].size() && v.first <= p[1][it].first; it++) upd(p[1][it].second, 1);
      |                     ~~~^~~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 7 / 7
• Subtask 3: 12 / 12
• Subtask 4: 22 / 22
• Subtask 5: 10 / 10
• Subtask 6: 13 / 13
• Subtask 7: 28 / 28