Submission #652597

#	Time	Username	Problem	Language	Result	Execution time	Memory
652597		dilaylay_dilaylaylay	XOR (IZhO12_xor)	C++17	0 / 100	1 ms	340 KiB

xor

#include <iostream>
#include <bits/stdc++.h>    
#include <cmath>
#include <algorithm>
#include <vector>
#include <deque>
#include <set>
#include <stack>
#include <string>
#include <map>
#include <queue>

#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")

using namespace std;

#define int long long
#define ll long long
#define vi vector<long long>
#define pb push_back
#define sz(s) (int)s.size()
#define all(v) v.begin(), v.end()
#define show(a) cerr << #a <<" -> "<< a <<"\n"
#define pp pair<int,int>
#define FF first
#define SS second
#define endl "\n"

const int N = 1e6 + 2, N3 = 1e3 + 6, inf = 1e9 + 7, LOG = 20;
map<char, int> md{{'N', 0}, {'E', 1}, {'S', 2}, {'W', 3}};
const int dx[] = {-1, 0, 1, 0};
const int dy[] = {0, 1, 0, -1};
string stepDir = "RDLU";

int n, x, a[N], mx, prf[N], j, pos;

bool check(int y) {
	for (int i = 1; i <= n - y + 1; i++) {
		int z = prf[i + y - 1] ^ prf[i - 1]; 
		if (z >= x) {
			pos = i;
			return 1;
		}
	}
	return 0;
}

main () {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);	
	
//	freopen("triangles.in", "r", stdin);
//	freopen("triangles.out", "w", stdout);
	
	cin >> n >> x;
	for (int i = 1; i <= n; i++) {
		cin >> a[i];
		prf[i] = prf[i - 1] ^ a[i];
	}
	
	int l = 1, r = n, ans = -1;
	while (l <= r) {
		int mid = (l + r) / 2;
		if (check(mid)) {
			ans = mid;
			l = mid + 1;
		}
		else r = mid - 1;
	}
	
	cout << pos << " " << ans;
		
	return 0;
}

Compilation message (stderr)

xor.cpp:13: warning: ignoring '#pragma comment ' [-Wunknown-pragmas]
   13 | #pragma comment(linker, "/stack:200000000")
      | 
xor.cpp:50:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   50 | main () {
      | ^~~~

• Subtask 1: 0 / 100