Submission #497514

#	Time	Username	Problem	Language	Result	Execution time	Memory
497514		thekcc	XOR (IZhO12_xor)	C++14	0 / 100	1 ms	336 KiB

xor

#include <bits/stdc++.h>
using namespace std;

const int N = 500001;

int pre[N],a[N];
int bi,bk,n,x;

int main(){
	cin.tie(0)->sync_with_stdio(0);
	cin >> n;
	cin >> x;
	pre[0]=0;
	for(int i=1; i<=n; i++){
        cin >> a[i];
        pre[i]=pre[i-1]^a[i];
	}
	bi=-1;
	bk=-1;
	int k;
	for(int i=0; i<n; i++){
        for(int j=i+1; j<=n; j++){
            if(x==pre[j]^pre[i]){
                if(j-i>bk){
                   bi=i; bk=j-i;
                }
            }

        }
	}
	cout << bi+1 << " " << bk;
}

Compilation message (stderr)

xor.cpp: In function 'int main()':
xor.cpp:23:17: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses]
   23 |             if(x==pre[j]^pre[i]){
      |                ~^~~~~~~~
xor.cpp:20:6: warning: unused variable 'k' [-Wunused-variable]
   20 |  int k;
      |      ^

• Subtask 1: 0 / 100