Submission #437437

#	Time	Username	Problem	Language	Result	Execution time	Memory
437437		MinhQNgo	XORanges (eJOI19_xoranges)	C++17	55 / 100	9 ms	460 KiB

xoranges

#include <bits/stdc++.h>

using namespace std;

const int N = 5005;

int a[N];
long long p[N];

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0);

    int n, q;
    cin >> n >> q;
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
        p[i] = p[i - 1] ^ a[i];
    }
    for (int _ = 0; _ < q; _++) {
        int t, x, y;
        cin >> t >> x >> y;
        if (t == 1) a[x] = y;
        else {
            if (x % 2 != y % 2) {
                cout << 0 << '\n';
            }
            else {
                long long ans = 0;
                for (int i = x; i <= y; i += 2) ans ^= a[i];
                cout << ans << '\n';
            }
        }
    }
}

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