oj.uz

Submission #465392

# Submission time Handle Problem Language Result Execution time Memory
465392 2021-08-15T20:10:57 Z a1415926 XORanges (eJOI19_xoranges) C++14
100 / 100
 662 ms 10516 KB 
#include <iostream>
#include <vector>
#include <cmath>
using namespace std;
typedef vector<int> vi;
struct segtree {
    int len;
    vi a;
    void make(int n) {
        len = 1;
        while (len < n) len *= 2;
        a.resize(2 * len, 0);
    }
    void update(int ind, int val) {
        ind += len;
        a[ind] = val;
        ind /= 2;
        while (ind > 0) {
            a[ind] = a[2 * ind + 1] ^ a[2 * ind];
            ind /= 2;
        }
    }
    int query(int l, int r) {
        l += len, r += len;
        int ans = 0;
        while (r >= l) {
            if (l % 2 == 1) ans ^= a[l++];
            if (r % 2 == 0) ans ^= a[r--];
            l /= 2, r /= 2;
        }
        return ans;
    }
};
int main()
{
    int n, q, a_1, type, b_1, b_2;
    segtree seg1, seg2;
    cin >> n >> q;
    seg1.make(n);
    seg2.make(n);
    for (int i = 0; i < n; i++) {
        cin >> a_1;
        if (i % 2) seg1.update(i, a_1);
        else seg2.update(i, a_1);
    }
    for (int i = 0; i < q; i++) {
        cin >> type >> b_1 >> b_2;
        if (type == 1) {
            if ((b_1-1) % 2) seg1.update(b_1 - 1, b_2);
            else seg2.update(b_1 - 1, b_2);
        }
        if (type == 2) {
            if ((b_2 - b_1 - 1) % 2) {
                if ((b_1 - 1) % 2) cout << seg1.query(b_1 - 1, b_2 - 1) << "\n";
                else cout << seg2.query(b_1 - 1, b_2 - 1) << "\n";
            }
            else cout << 0 << "\n";
        }
    }
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 292 KB Output is correct
3 Correct 1 ms 272 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 292 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 288 KB Output is correct
2 Correct 2 ms 204 KB Output is correct
3 Correct 2 ms 204 KB Output is correct
4 Correct 2 ms 296 KB Output is correct
5 Correct 2 ms 204 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 292 KB Output is correct
3 Correct 1 ms 272 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 292 KB Output is correct
6 Correct 2 ms 288 KB Output is correct
7 Correct 2 ms 204 KB Output is correct
8 Correct 2 ms 204 KB Output is correct
9 Correct 2 ms 296 KB Output is correct
10 Correct 2 ms 204 KB Output is correct
11 Correct 12 ms 432 KB Output is correct
12 Correct 11 ms 460 KB Output is correct
13 Correct 15 ms 460 KB Output is correct
14 Correct 14 ms 528 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 625 ms 10516 KB Output is correct
2 Correct 614 ms 10320 KB Output is correct
3 Correct 617 ms 10400 KB Output is correct
4 Correct 662 ms 9992 KB Output is correct
5 Correct 598 ms 10080 KB Output is correct

Subtask #5
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 292 KB Output is correct
3 Correct 1 ms 272 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 292 KB Output is correct
6 Correct 2 ms 288 KB Output is correct
7 Correct 2 ms 204 KB Output is correct
8 Correct 2 ms 204 KB Output is correct
9 Correct 2 ms 296 KB Output is correct
10 Correct 2 ms 204 KB Output is correct
11 Correct 12 ms 432 KB Output is correct
12 Correct 11 ms 460 KB Output is correct
13 Correct 15 ms 460 KB Output is correct
14 Correct 14 ms 528 KB Output is correct
15 Correct 625 ms 10516 KB Output is correct
16 Correct 614 ms 10320 KB Output is correct
17 Correct 617 ms 10400 KB Output is correct
18 Correct 662 ms 9992 KB Output is correct
19 Correct 598 ms 10080 KB Output is correct
20 Correct 547 ms 10104 KB Output is correct
21 Correct 468 ms 10048 KB Output is correct
22 Correct 473 ms 10136 KB Output is correct
23 Correct 575 ms 10056 KB Output is correct
24 Correct 591 ms 10020 KB Output is correct