Submission #589074

#	Time	Username	Problem	Language	Result	Execution time	Memory
589074		proma	XOR (IZhO12_xor)	C++17	0 / 100	1 ms	336 KiB

xor

#include <bits/stdc++.h>

#define int long long
#define see(x) cout<<#x<<"="<<x<<"\n";
#define endl "\n"

using namespace std;

const int N = 250005;

int n, x, a[N], pref[N];

int32_t main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
/*
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
*/

    cin >> n >> x;

    pref[0] = 0;
    for (int i = 1; i <= n; i ++) {
        cin >> a[i];
        pref[i] = pref[i-1] ^ a[i];
    }

    int l = 1, r = n, i, k = -1;
    while (l <= r) {
        int m = (l + r) / 2;
        int flag = 0;
        for (int j = 1; j + m - 1 <= n; j ++) {
            if ((pref[j+m-1] ^ pref[j-1]) >= x) {
                i = j;
                k = m;
                flag = 1;
                l = m + 1;
                break;
            }
        }
        if (!flag) r = m - 1;
    }

    cout << i << " " << k << endl;

    return 0;
}

• Subtask 1: 0 / 100