Submission #348059

#	Time	Username	Problem	Language	Result	Execution time	Memory
348059		shrek12357	trapezoid (balkan11_trapezoid)	C++14	0 / 100	361 ms	21448 KiB

trapezoid

#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <map>
#include <set>
#include <climits>
#include <cmath>
#include <fstream>
#include <queue>
#include <stack>
#include <iomanip>
#include <bitset>
//#include "molecules.h"
using namespace std;
#define ll long long
//cin.tie(0);ios_base::sync_with_stdio(0);

struct s {
	int x, y, x1, y1;
};

bool comp(s a, s b) {
	return min(a.x, a.x1) < min(b.x, b.x1);
}

const int MAXN = 1e5 + 5;

int BIT[MAXN];

void update(int idx, int val) {
	for (; idx < MAXN; idx += idx & -idx) {
		BIT[idx] = max(BIT[idx], val);
	}
}

int query(int idx) {
	int ret = 0;
	for (; idx > 0; idx -= idx & -idx) {
		ret = max(ret, BIT[idx]);
	}
	return ret;
}

int dp[MAXN];
ll ways[MAXN];

const int MOD = 30013;

int main() {
	int n;
	cin >> n;
	vector<pair<pair<int, int>, pair<int, int>>> nums;
	map<int, int> cc;
	vector<int> p;
	for (int i = 0; i < n; i++) {
		int a, b, c, d;
		cin >> a >> b >> c >> d;
		p.push_back(a);
		p.push_back(b);
		p.push_back(c);
		p.push_back(d);
		nums.push_back({ {a, c}, {i, 1} });
		nums.push_back({ {b, d}, {i, 2} });
	}
	sort(p.begin(), p.end());
	sort(nums.begin(), nums.end());
	int cnt = 1;
	for (int i = 0; i < p.size(); i++) {
		if (cc.find(p[i]) != cc.end()) {
			continue;
		}
		cc[p[i]] = cnt;
		cnt++;
	}
	int ans = 0;
	for (int i = 0; i < nums.size(); i++) {
		if (nums[i].second.second == 1) {
			dp[i] = query(cc[nums[i].first.second]);
			dp[i]++;
			ans = max(ans, dp[i]);
		}
		else {
			update(cc[nums[i].first.second], dp[nums[i].second.first]);
		}
	}
	cout << ans << endl;
}

Compilation message (stderr)

trapezoid.cpp: In function 'int main()':
trapezoid.cpp:69:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   69 |  for (int i = 0; i < p.size(); i++) {
      |                  ~~^~~~~~~~~~
trapezoid.cpp:77:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<int, int>, std::pair<int, int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   77 |  for (int i = 0; i < nums.size(); i++) {
      |                  ~~^~~~~~~~~~~~~

• Subtask 1: 0 / 100