Submission #907361

#	Time	Username	Problem	Language	Result	Execution time	Memory
907361		Tymond	Permutation (APIO22_perm)	C++17	0 / 100	1 ms	348 KiB

perm

#include <bits/stdc++.h>
#include "perm.h"

using namespace std;
using ll = long long;
using ld = long double;

const ld INF = 1e9;

void zmien(vector<ld>& a){
	vector<ld> nasz = a;
	sort(nasz.begin(), nasz.end());

	for(int i = 0; i < (int)a.size(); i++){
		for(int j = 0; j < nasz.size(); j++){
			if(a[i] == nasz[j]){
				a[i] = j;
				break;
			}
		}
	}
}

vector<signed> construct_permutation(ll k){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);

	int aktBit = 0;
	ll pot = 1;
	while(pot * 2 <= k){
		aktBit++;
		pot *= 2;
	}

	vector<ld> ans;
	bool bylo = false;
	while(aktBit > 0){
		aktBit -= 2;
		if(aktBit == -1){
			//został jeden na końcu
			ans.push_back(INF);//n * 2
			if(k & (1 << (aktBit + 1))){
				ans.push_back(-INF);//n + 1
			}
			zmien(ans);
			continue;
		}

		int kon = (k >> aktBit) & 3;
		if(kon == 0){
			//n * 4
			ans.push_back(INF);
			ans.push_back(INF + 1);
		}else if(kon == 1){
			//n * 4 + 1
			ans.push_back(INF);
			ans.push_back(INF + 1);
			ans.push_back(-INF);
			bylo = true;
		}else if(kon == 2){
			//n * 4 + 2
			ans.push_back(INF);
			ans.push_back(-INF);
			ans.push_back(INF + 1);
			bylo = true;
		}else if(kon == 3){
			//4 * n + 3
			if(bylo){	
				ans.push_back(INF);
				ans.push_back(-INF);
				ans.push_back(INF + 1);
				ans.push_back(-INF - 1);
				bylo = true;
			}else{
				ans.push_back(INF);
				ans.push_back(INF + 1);
				ans.push_back(0.5);
			}
		}
		zmien(ans);
	}

	return vector<signed> (ans.begin(), ans.end());
}

Compilation message (stderr)

perm.cpp: In function 'void zmien(std::vector<long double>&)':
perm.cpp:15:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long double>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |   for(int j = 0; j < nasz.size(); j++){
      |                  ~~^~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 90