Submission #1246292

#	Time	Username	Problem	Language	Result	Execution time	Memory
1246292		trinm01	XORanges (eJOI19_xoranges)	C++20	30 / 100	1093 ms	1864 KiB

xoranges

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

#define int long long

int n, q;
vector<int> a;

int bruteForce(int l, int r) {
    int res = 0;
    for (int i = l; i <= r; ++i) {
        int xorSub = 0;
        for (int j = i; j <= r; ++j) {
            xorSub ^= a[j];
            res ^= xorSub;
        }
    }
    return res;
}

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

    cin >> n >> q;
    a.resize(n + 1); 
    for (int i = 1; i <= n; ++i) cin >> a[i];

    while (q--) {
        int type;
        cin >> type;
        if (type == 1) {
            int i, x;
            cin >> i >> x;
            a[i] = x;
        } else {
            int l, r;
            cin >> l >> r;
            cout << bruteForce(l, r) << '\n';
        }
    }

    return 0;
}

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