oj.uz

Submission #999700

# Submission time Handle Problem Language Result Execution time Memory
999700 2024-06-16T05:25:55 Z vjudge1 XORanges (eJOI19_xoranges) C++17
100 / 100
 439 ms 7988 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define MAX 1000000
struct Segtree{
    int n;
    vector<int> tr, ar;
    Segtree(int si){
        n = si;
        tr.assign(4 * n, 0);
    }
    void build(int v, int l, int r){
        if (l == r){
            tr[v] = ar[l];
        }
        else{
            int mid = (l + r) / 2;
            build(v * 2, l, mid);
            build(v * 2 + 1, mid + 1, r);
            tr[v] = tr[v * 2] ^ tr[v * 2 + 1];
        }
    }
    void update(int v, int l, int r, int pos, int nval){
        if (l == r){
            tr[v] = nval;
        }
        else{
            int mid = (l + r) / 2;
            if (pos <= mid){
                update(v * 2, l, mid, pos, nval);
            }
            else{
                update(v * 2 + 1, mid + 1, r, pos, nval);
            }
            tr[v] = tr[v * 2] ^ tr[v * 2 + 1];
        }
    }
    int query(int v, int l, int r, int ql, int qr){
        if (r < ql || l > qr){
            return 0;
        }
        else if (ql <= l && r <= qr){
            return tr[v];
        }
        else{
            int mid = (l + r) / 2;
            return query(v * 2, l, mid, ql, qr) ^ query(v * 2 + 1, mid + 1, r, ql, qr);
        }
    }
};
int main(){
    int n, a, q, ty, l, r;
    cin>>n>>q;
    Segtree sodd(n), seven(n);
    for (int i = 0; i < n; i++){
        cin>>a;
        if (i % 2 == 0){
            seven.update(1, 0, n - 1, i, a);
        }
        else{
            sodd.update(1, 0, n - 1, i, a);
        }
    }
    for (int i = 0; i < q; i++){
        cin>>ty>>l>>r;
        if (ty == 1){
            l--;
            if (l % 2 == 0){
                seven.update(1, 0, n - 1, l, r);
            }
            else{
                sodd.update(1, 0, n - 1, l, r);
            }
        }
        else{
            l--, r--;
            if ((r - l + 1) % 2 == 0){
                cout<<0<<"\n";
            }
            else{
                if (l % 2 == 0){
                    cout<<seven.query(1, 0, n - 1, l, r);
                }
                else{
                    cout<<sodd.query(1, 0, n - 1, l, r);
                }
                cout<<"\n";
            }
        }
    }
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 412 KB Output is correct
5 Correct 0 ms 348 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 412 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 7 ms 348 KB Output is correct
12 Correct 9 ms 604 KB Output is correct
13 Correct 11 ms 604 KB Output is correct
14 Correct 9 ms 604 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 368 ms 7728 KB Output is correct
2 Correct 439 ms 7988 KB Output is correct
3 Correct 366 ms 7724 KB Output is correct
4 Correct 390 ms 7712 KB Output is correct
5 Correct 382 ms 7856 KB Output is correct

Subtask #5
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 412 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 7 ms 348 KB Output is correct
12 Correct 9 ms 604 KB Output is correct
13 Correct 11 ms 604 KB Output is correct
14 Correct 9 ms 604 KB Output is correct
15 Correct 368 ms 7728 KB Output is correct
16 Correct 439 ms 7988 KB Output is correct
17 Correct 366 ms 7724 KB Output is correct
18 Correct 390 ms 7712 KB Output is correct
19 Correct 382 ms 7856 KB Output is correct
20 Correct 300 ms 7252 KB Output is correct
21 Correct 291 ms 7200 KB Output is correct
22 Correct 361 ms 7200 KB Output is correct
23 Correct 372 ms 7716 KB Output is correct
24 Correct 385 ms 7724 KB Output is correct