Submission #134578

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
134578	2019-07-23T04:32:49 Z	mohammedehab2002	XOR (IZhO12_xor)	C++11	100 / 100	203 ms	23416 KB

xor

#include <iostream>
using namespace std;
int l,trie[10000000][2],mn[10000000],cn;
void insert(int x,int idx)
{
	int cur=0;
	for (int i=29;i>=0;i--)
	{
		bool b=(x&(1<<i));
		if (!trie[cur][b])
		{
			trie[cur][b]=++cn;
			mn[cn]=idx;
		}
		cur=trie[cur][b];
		mn[cur]=min(mn[cur],idx);
	}
}
int get(int x)
{
	int cur=0,ans=1e9;
	for (int i=29;i>=0;i--)
	{
		bool b=(x&(1<<i)),b2=(l&(1<<i));
		if (!b2 && trie[cur][!b])
		ans=min(ans,mn[trie[cur][!b]]);
		b^=b2;
		if (!trie[cur][b])
		break;
		cur=trie[cur][b];
	}
	return ans;
}
int main()
{
	int n,cum=0,k=-1,idx;
	scanf("%d%d",&n,&l);
	l--;
	for (int i=1;i<=n;i++)
	{
		int a;
		scanf("%d",&a);
		insert(cum,i-1);
		cum^=a;
		int tmp=get(cum);
		if (i-tmp>k)
		{
			k=i-tmp;
			idx=tmp+1;
		}
	}
	printf("%d %d",idx,k);
}

Compilation message

xor.cpp: In function 'int main()':
xor.cpp:37:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&l);
  ~~~~~^~~~~~~~~~~~~~
xor.cpp:42:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a);
   ~~~~~^~~~~~~~~

Subtask #1

100.0 / 100.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	376 KB	Output is correct
2	Correct	2 ms	376 KB	Output is correct
3	Correct	2 ms	376 KB	Output is correct
4	Correct	2 ms	504 KB	Output is correct
5	Correct	9 ms	1016 KB	Output is correct
6	Correct	11 ms	1116 KB	Output is correct
7	Correct	12 ms	1052 KB	Output is correct
8	Correct	13 ms	1144 KB	Output is correct
9	Correct	58 ms	11000 KB	Output is correct
10	Correct	55 ms	11000 KB	Output is correct
11	Correct	57 ms	11000 KB	Output is correct
12	Correct	56 ms	11128 KB	Output is correct
13	Correct	74 ms	11000 KB	Output is correct
14	Correct	60 ms	11000 KB	Output is correct
15	Correct	61 ms	10976 KB	Output is correct
16	Correct	64 ms	11004 KB	Output is correct
17	Correct	197 ms	23416 KB	Output is correct
18	Correct	158 ms	23288 KB	Output is correct
19	Correct	191 ms	23276 KB	Output is correct
20	Correct	203 ms	23396 KB	Output is correct