제출 #464492

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
464492		Itamar	XORanges (eJOI19_xoranges)	C++14	0 / 100	671 ms	4760 KiB

xoranges

// oranges.cpp : This file contains the 'main' function. Program execution begins and ends there.
//
using namespace std;
#include <iostream>
#include <algorithm>
#include <vector>

vector<int> odd;
vector<int> eve;
vector<int> val;
int n, q;

void fun() {
    int xo = 0;
    for (int i = 0; i < n; i += 2) {
        xo = xo ^ val[i];
        eve.push_back(xo);
    }
    xo = 0;
    for (int i = 1; i < n; i += 2) {
        xo = xo ^ val[i];
        odd.push_back(xo);
    }
}

int main()
{

    cin >> n;
    cin >> q;

    for (int i = 0; i < n; i++) {
        int x;
        cin >> x;
        val.push_back(x);

    }

    fun();
    for (int i = 0; i < q; i++) {
        int a, b, c;
        cin >> a;
        cin >> b;
        cin >> c;
        if (a == 1) {
            val[b - 1] = c;
            fun();
        }
        else {
            if ((b - c-1) % 2 == 0) {
                cout << 0 << endl;
            }
            else {
                if ((b - 1) % 2 == 0) {
                    int x = (odd[(b - 2) / 2])^(odd[(c-2) / 2]);
                    cout << x << endl;
                }
                else {
                    int x = eve[(b - 2) / 2] ^ eve[(c-2) / 2];
                    cout << x << endl;
                }
            }
        }

    }
}

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