oj.uz

Submission #999870

# Submission time Handle Problem Language Result Execution time Memory
999870 2024-06-16T07:47:03 Z vjudge1 XORanges (eJOI19_xoranges) C++17
100 / 100
 103 ms 17048 KB 
#pragma GCC optimize("Ofast")
#include"bits/stdc++.h"

#define int long long

using namespace std;

const int sz = 2e5 + 10;

int st[2][sz * 4], a[sz];

void build(int le, int ri, int v, int x) {
    if (le == ri) {
        if (le % 2 == x) {
            st[x][v] = a[le];
        }
        return;
    }
    int mi = le + (ri - le) / 2;
    build(le, mi, v * 2, x);
    build(mi + 1, ri, v * 2 + 1, x);
    st[x][v] = st[x][v * 2] ^ st[x][v * 2 + 1];
}

void update(int le, int ri, int ix, int v, int k, int x) {
    if (le > ix || ri < ix) return;
    if (le == ix && ix == ri) {
        st[x][v] = k;
        return;
    }
    int mi = le + (ri - le) / 2;
    update(le, mi, ix, v * 2, k, x);
    update(mi + 1, ri, ix, v * 2 + 1, k, x);
    st[x][v] = st[x][v * 2] ^ st[x][v * 2 + 1];
}

int query(int le, int ri, int ql, int qr, int v, int x) {
    if (le > qr || ri < ql) return 0;
    if (ql <= le && ri <= qr) return st[x][v];
    int mi = le + (ri - le) / 2;
    int lq = query(le, mi, ql, qr, v * 2, x);
    int rq = query(mi + 1, ri, ql, qr, v * 2 + 1, x);
    return lq ^ rq;
}

signed main() {
    cin.tie(nullptr)->sync_with_stdio(false);

    int n, q;
    cin >> n >> q;

    for (int i = 1; i <= n; i ++) {
        cin >> a[i];
    }

    build(1, n, 1, 0);
    build(1, n, 1, 1);

    while (q --) {
        int t, le, ri;
        cin >> t >> le >> ri;
        if (1 == t) {
            update(1, n, le, 1, ri, le % 2);
        } else {
            int d = ri - le + 1;
            if (d % 2) {
                cout << query(1, n, le, ri, 1, le % 2) << '\n';
            } else {
                cout << "0\n";
                // int lq = query(1, n, le, ri - d / 2, 1, (le + 1) % 2);
                // int rq = query(1, n, le + d / 2, ri, 1, (le) % 2);
                // cout << (lq ^ rq) << '\n';
            }
        }
    }
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4568 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4584 KB Output is correct
3 Correct 1 ms 4564 KB Output is correct
4 Correct 1 ms 4552 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4568 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4584 KB Output is correct
8 Correct 1 ms 4564 KB Output is correct
9 Correct 1 ms 4552 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Correct 2 ms 4700 KB Output is correct
12 Correct 3 ms 4748 KB Output is correct
13 Correct 2 ms 4700 KB Output is correct
14 Correct 2 ms 4700 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 89 ms 13908 KB Output is correct
2 Correct 80 ms 17048 KB Output is correct
3 Correct 76 ms 16976 KB Output is correct
4 Correct 69 ms 16724 KB Output is correct
5 Correct 69 ms 16924 KB Output is correct

Subtask #5
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4568 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4584 KB Output is correct
8 Correct 1 ms 4564 KB Output is correct
9 Correct 1 ms 4552 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Correct 2 ms 4700 KB Output is correct
12 Correct 3 ms 4748 KB Output is correct
13 Correct 2 ms 4700 KB Output is correct
14 Correct 2 ms 4700 KB Output is correct
15 Correct 89 ms 13908 KB Output is correct
16 Correct 80 ms 17048 KB Output is correct
17 Correct 76 ms 16976 KB Output is correct
18 Correct 69 ms 16724 KB Output is correct
19 Correct 69 ms 16924 KB Output is correct
20 Correct 79 ms 16856 KB Output is correct
21 Correct 103 ms 16720 KB Output is correct
22 Correct 81 ms 16652 KB Output is correct
23 Correct 71 ms 16932 KB Output is correct
24 Correct 73 ms 16724 KB Output is correct