Xor sum

// Online C++ compiler to run C++ program online
#include <iostream>
#include <vector>
#include <climits>
 
using namespace std;
 
int main() {
    int n, q;
    cin >> n >> q;
    
    vector<int> xoris(n);
    
    int xori = 0;
    for (int i = 0; i < n; i++)
    {
        int val;
        cin >> val;
        xori ^= val;
        xoris[i] = xori;
        // cout << xoris[i] << " ";
    }
    
    for (int i = 0; i < q; i++)
    {
        int a, b;
        cin >> a >> b;
        if (a == 1)
            cout << xoris[b-1] << endl;
        else
            cout << (xoris[a-2] ^ xoris[b-1]) << endl;
    }
    
 
    return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED