Submission #838139

#	Time	Username	Problem	Language	Result	Execution time	Memory
838139		BlockOG	XORanges (eJOI19_xoranges)	C++14	55 / 100	1031 ms	1652 KiB

xoranges

#include <iostream>

using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    
    int n, q; cin >> n >> q;
    unsigned int o[n]; for (int i = 0; i < n; i++) cin >> o[i];

    for (int it = 0; it < q; it++) {
        int code; cin >> code;
        if (code == 1) {
            int i; cin >> i >> o[--i];
        } else {
            int l, u; cin >> l >> u;
            if (!((u - l + 1) & 1)) {
                cout << 0 << endl;
                continue;
            }

            unsigned int res = 0;
            for (int i = l - 1; i < u; i += 2) res ^= o[i];
            cout << res << endl;
        }
    }
}

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