Submission #1219211

#	Time	Username	Problem	Language	Result	Execution time	Memory
1219211		mariamp1	XORanges (eJOI19_xoranges)	C++20	55 / 100	1094 ms	2104 KiB

xoranges

#include <bits/stdc++.h>
using namespace std;

#define int long long

int32_t main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    int n, q;
    cin >> n >> q;

    vector<int> a(n);
    for(int i = 0; i < n; i++) cin >> a[i];

    while (q--) {
        int type;
        cin >> type;
        if (type == 1) {
            int i, x;
            cin >> i >> x;
            a[i - 1] = x;
        } else {
            int l, r;
            cin >> l >> r;
            l--, r--;
            int result = 0;
            for (int i = l; i <= r; ++i) {
                int count = (i - l + 1) * (r - i + 1);
                if (count % 2 == 1)
                    result ^= a[i];
            }
            cout << result << '\n';
        }
    }

    return 0;
}

• Subtask 1: 12 / 12
• Subtask 2: 18 / 18
• Subtask 3: 25 / 25
• Subtask 4: 0 / 20
• Subtask 5: 0 / 25