Submission #838124

#	Time	Username	Problem	Language	Result	Execution time	Memory
838124		BlockOG	XORanges (eJOI19_xoranges)	C++14	0 / 100	1046 ms	5336 KiB

xoranges

#include <iostream>

using namespace std;

int main() {
    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 u, l; cin >> u >> l;
            if (!(u - l + 1 & 1)) continue;

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

Compilation message (stderr)

xoranges.cpp: In function 'int main()':
xoranges.cpp:15:25: warning: suggest parentheses around '+' in operand of '&' [-Wparentheses]
   15 |             if (!(u - l + 1 & 1)) continue;
      |                   ~~~~~~^~~

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