Submission #338632

#	Time	Username	Problem	Language	Result	Execution time	Memory
338632		amunduzbaev	XOR (IZhO12_xor)	C++14	100 / 100	144 ms	22380 KiB

xor

/** made by amunduzbaev **/
#include <bits/stdc++.h>
using namespace std;
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define ub upper_bound
#define lb lower_bound
#define ll long long 
#define ld long double 
#define pii pair<int, int>
#define pll pair<ll, ll>
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(),x.rend()
#define fastios ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define vll vector<ll>
#define vii vector<int>
#define vpii vector<pii>
#define vpll vector<pll>
#define cnt(a)__builtin_popcount(a)

const int N = 250005 ;
const int mod = 1e9+7;
const ll inf = 1e18;
const ld Pi = acos(-1);

int n, m, k, ans, a[N];
int tree[N*30][2], node, sub[N*30];

void sett(int x, int ind){
	int now = 0;
	for(int i=29;i>=0;i--){
		int bit = (x>>i)&1;
		if(tree[now][bit]) now = tree[now][bit];
		else{
			tree[now][bit] = ++node;
			now = node;
			sub[now] = n+1;
		}
		sub[now] = min(sub[now], ind);
	}
}
 
int get(int i, int x, int now, int cur){
	if(cur >= k) return sub[now];
	if(i<0 || cur + (1<<(i+1))-1 < k) return n+1;
	
	int bit = (x>>i)&1, res = n+1;
	for(int j=0;j<2;j++)
		if(tree[now][j]) res = min(res, get(i-1, x, tree[now][j], (cur + (j != bit ? (1<<i) : 0))));
	return res;
}
 
void solve(){
	fastios 
	cin>>n>>k;
	for(int i=1;i<=n;i++){
		cin>>a[i];
		a[i] ^= a[i-1];
	}
	int l = 1, r = 1;
	for(int i=1;i<=n;i++){
		sett(a[i-1], i);
		int lx = get(29, a[i], 0, 0);
		if(i - lx > r - l) r = i, l = lx;
	}
	cout<<l<<" "<<r-l+1<<endl;
	return;
}
 
 
int main(){
	fastios
	int t = 1;
	if(t) solve();
	else {
		cin>>t;
		while (t--) solve();
	}
	return 0;
}

• Subtask 1: 100 / 100