Submission #835307

#	Time	Username	Problem	Language	Result	Execution time	Memory
835307		enerelt14	Global Warming (CEOI18_glo)	C++14	10 / 100	53 ms	3156 KiB

glo

#include <algorithm>
#include <array>
#include <bitset>
#include <cassert>
#include <chrono>
#include <climits>
#include <cmath>
#include <complex>
#include <cstring>
#include <functional>
#include <iomanip>
#include <iostream>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <set>
#include <vector>
using namespace std;

const int MX = 2e5 + 5;

int n, x, t[MX];
vector<int> lis[2];

int find(int id, int l, int r, int val) {
	if(l == r) {
		if(lis[id][l] < val) return l;
		else return l - 1;
	}
	int mid = (l + r) / 2;
	if(lis[id][mid] < val) return find(id, mid + 1, r, val);
	else return find(id, l, mid, val);
}

void show() {
	for(int id = 0; id < 2; id++) {
		for(int i = 0; i < (int)lis[id].size(); i++) cout << lis[id][i] << " ";
		cout << "\n";
	}
	cout << "---------------\n";
}

int main() {
	ios::sync_with_stdio(0);cin.tie(0);
	cin >> n >> x;
	for(int i = 0; i < n; i++) {
		cin >> t[i];
		if(!i) {
			lis[0].push_back(t[0]);
			lis[1].push_back(t[0]);
			continue;
		}
		int a = find(0, 0, (int)lis[0].size() - 1, t[i]);
		int b = find(1, 0, (int)lis[1].size() - 1, t[i]);
		int c = find(0, 0, (int)lis[0].size() - 1, t[i] + x);
		for(int i = max(a, b); i < c ; i++) {
			lis[1][i + 1] = min(lis[1][i + 1], t[i]);
		}
		if(c == lis[1].size() - 1) lis[1].push_back(t[i]);
		else lis[1][c + 1] = min(lis[1][c + 1], t[i]);
		if(a == (int)lis[0].size() - 1) lis[0].push_back(t[i]);
		else lis[0][a + 1] = t[i];
		if(b == (int)lis[1].size() - 1) lis[1].push_back(t[i]);
		else lis[1][b + 1] = t[i];
		//show();
	}
	cout << (int)lis[1].size();
}

Compilation message (stderr)

glo.cpp: In function 'int main()':
glo.cpp:60:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   60 |   if(c == lis[1].size() - 1) lis[1].push_back(t[i]);
      |      ~~^~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 13
• Subtask 4: 10 / 10
• Subtask 5: 0 / 20
• Subtask 6: 0 / 17
• Subtask 7: 0 / 25