Submission #418496

#	Time	Username	Problem	Language	Result	Execution time	Memory
418496		johutha	Rectangles (IOI19_rect)	C++17	0 / 100	567 ms	22812 KiB

rect

#include "rect.h"
#include <bits/stdc++.h>
using namespace std;
 
vector<int> tree;
 
 
void update(int v, int rl, int rr, int pos, int x) {
	if (rl == rr) {
		tree[v] = x;
		return;
	}
 
	int rm = (rl + rr)/2;
 
	if (pos <= rm) update(v*2, rl, rm, pos, x);
	else update(v*2+1, rm+1, rr, pos, x);
 
	tree[v] = max(tree[v*2], tree[v*2+1]);
}
 
 
int querry(int v, int rl, int rr, int ql, int qr) {
	if (ql > qr) return 0;
	if (rl == ql && rr == qr) {
		return tree[v];
	}
	int rm = (rl + rr) / 2;
 
	return max(querry(v*2, rl, rm, ql, min(qr, rm)), querry(v*2+1, rm+1, rr, max(rm+1, ql), qr));
}
 
 
 
 
long long count_rectangles(std::vector<std::vector<int> > a) {
	vector<bool> topBottom;
 
	tree.assign(a[1].size()*4, 0);
 
	int res = 0;
 
	for (int i = 0; i<a[1].size(); i++) {
		topBottom.push_back(a[1][i] < a[0][i] && a[1][i] < a[2][i]);
		update(1, 0, a[1].size()-1, i, a[1][i]);
	}
 
	for (int i = 1; i<a[1].size()-1; i++) {
		for (int j = i; j<a[1].size()-1; j++) {
			if (querry(1, 0, a[1].size()-1, i, j) < min(a[1][i-1], a[1][j+1])) { res++;}
		}
	}
 
	return res;
}

Compilation message (stderr)

rect.cpp: In function 'long long int count_rectangles(std::vector<std::vector<int> >)':
rect.cpp:43:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |  for (int i = 0; i<a[1].size(); i++) {
      |                  ~^~~~~~~~~~~~
rect.cpp:48:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |  for (int i = 1; i<a[1].size()-1; i++) {
      |                  ~^~~~~~~~~~~~~~
rect.cpp:49:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |   for (int j = i; j<a[1].size()-1; j++) {
      |                   ~^~~~~~~~~~~~~~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 7
• Subtask 3: 0 / 12
• Subtask 4: 0 / 22
• Subtask 5: 0 / 10
• Subtask 6: 0 / 13
• Subtask 7: 0 / 28