Submission #126367

#	Time	Username	Problem	Language	Result	Execution time	Memory
126367		TadijaSebez	Minerals (JOI19_minerals)	C++14	100 / 100	75 ms	4280 KiB

minerals

#include "minerals.h"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
void Solve(vector<int> l, vector<int> r, int in)
{
	if(l.size()==1)
	{
		Answer(l[0],r[0]);
		return;
	}
	int pre;
	vector<int> L[2],R[2];
	int sz=l.size()/3;
	if(l.size()==2) sz=1;
	for(int i=0;i<l.size();i++) L[i>=sz].pb(l[i]);
	for(int i:L[0]) pre=Query(i);
	for(int i:r)
	{
		if(L[0].size()==R[0].size()) R[1].pb(i);
		else if(L[1].size()==R[1].size()) R[0].pb(i);
		else
		{
			int now=Query(i);
			if(now==pre)
			{
				if(in) R[1].pb(i);
				else R[0].pb(i);
			}
			else
			{
				if(in) R[0].pb(i);
				else R[1].pb(i);
			}
			pre=now;
		}
	}
	Solve(L[0],R[0],in^1);
	Solve(L[1],R[1],in);
}
void Solve(int n)
{
	srand(time(0));
	vector<int> l,r;
	int pre=0;
	for(int i=1;i<=n*2;i++)
	{
		int now=Query(i);
		if(now!=pre) l.pb(i);
		else r.pb(i);
		pre=now;
	}
	Solve(l,r,1);
}

Compilation message (stderr)

minerals.cpp: In function 'void Solve(std::vector<int>, std::vector<int>, int)':
minerals.cpp:16:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<l.size();i++) L[i>=sz].pb(l[i]);
              ~^~~~~~~~~
minerals.cpp:25:4: warning: 'pre' may be used uninitialized in this function [-Wmaybe-uninitialized]
    if(now==pre)
    ^~

• Subtask 1: 6 / 6
• Subtask 2: 25 / 25
• Subtask 3: 9 / 9
• Subtask 4: 30 / 30
• Subtask 5: 5 / 5
• Subtask 6: 5 / 5
• Subtask 7: 5 / 5
• Subtask 8: 5 / 5
• Subtask 9: 10 / 10