Submission #346788

#	Time	Username	Problem	Language	Result	Execution time	Memory
346788		wwdd	Unscrambling a Messy Bug (IOI16_messy)	C++14	100 / 100	3 ms	640 KiB

messy

#include <vector>


#include "messy.h"
#include <bits/stdc++.h>
using namespace std;
typedef vector<int> vi;
void det(int l, int r, int n, vi& pa, vi& res) {
	if(l == r) {
		res[pa[0]] = l;return;
	}
	string ref(n,'1');
	for(int i=0;i<pa.size();i++) {
		ref[pa[i]] = '0';
	}
	vi ls,rs;
	for(int i=0;i<pa.size();i++) {
		string qu = ref;
		qu[pa[i]] = '1';
		if(check_element(qu)) {
			ls.push_back(pa[i]);
		} else {
			rs.push_back(pa[i]);
		}
	}
	int m = (l+r)/2;
	det(l,m,n,ls,res);
	det(m+1,r,n,rs,res);
}

std::vector<int> restore_permutation(int n, int w, int r) {
	int nb = 0;
	while((1<<nb) < n) {
		nb++;
	}
	for(int b=1;b<=nb;b++) {
		int sz = (1<<b);
		for(int i=0;i<n;i+=sz) {
			for(int j=0;j<sz/2;j++) {
				string ad;
				ad.assign(n,'1');
				for(int k=0;k<sz;k++) {
					ad[i+k] = '0';
				}
				ad[i+j] = '1';
				add_element(ad);
			}
		}
	}
    compile_set();
	vi res(n,0);
	vi par;
	for(int i=0;i<n;i++) {
		par.push_back(i);
	}
	det(0,n-1,n,par,res);
	return res;
}

Compilation message (stderr)

messy.cpp: In function 'void det(int, int, int, vi&, vi&)':
messy.cpp:13:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |  for(int i=0;i<pa.size();i++) {
      |              ~^~~~~~~~~~
messy.cpp:17:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |  for(int i=0;i<pa.size();i++) {
      |              ~^~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 18 / 18
• Subtask 3: 11 / 11
• Subtask 4: 21 / 21
• Subtask 5: 30 / 30