Submission #997616

#	Time	Username	Problem	Language	Result	Execution time	Memory
997616		TimDee	Minerals (JOI19_minerals)	C++17	90 / 100	30 ms	3660 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()/2;
    	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:16:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |      for(int i=0;i<l.size();i++) L[i>=sz].pb(l[i]);
      |                  ~^~~~~~~~~
minerals.cpp:25:8: warning: 'pre' may be used uninitialized in this function [-Wmaybe-uninitialized]
   25 |        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: 0 / 10