oj.uz

Submission #890305

# Submission time Handle Problem Language Result Execution time Memory
890305 2023-12-21T02:34:28 Z 12345678 XORanges (eJOI19_xoranges) C++17
100 / 100
 133 ms 13396 KB 
#include <bits/stdc++.h>

using namespace std;

const int nx=2e5+5;
int n, q, a[nx], t, l, r, idx, vl, res;

struct segtree
{
    int d[4*nx];
    void update(int l, int r, int i, int idx, int vl)
    {
        if (idx<l||r<idx) return;
        if (l==r) return void(d[i]=vl);
        int md=(l+r)/2;
        update(l, md, 2*i, idx, vl);
        update(md+1, r, 2*i+1, idx, vl);
        d[i]=d[2*i]^d[2*i+1];
    }
    int query(int l, int r, int i, int ql, int qr)
    {
        if (qr<l||r<ql) return 0;
        if (ql<=l&&r<=qr) return d[i];
        int md=(l+r)/2;
        return query(l, md, 2*i, ql, qr)^query(md+1, r ,2*i+1, ql, qr);
    }
} odd, even;

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>n>>q;
    for (int i=1; i<=n; i++) 
    {
        cin>>a[i];
        if (i%2==1) odd.update(1, n, 1, i, a[i]);
        else even.update(1, n, 1, i, a[i]);
    }
    while (q--)
    {
        cin>>t;
        if (t==1) 
        {
            cin>>idx>>a[idx];
            if (idx%2==1) odd.update(1, n, 1, idx ,a[idx]);
            else even.update(1, n, 1, idx, a[idx]);
        }
        else
        {
            cin>>l>>r;
            if ((r-l+1)%2==0) cout<<0<<'\n';
            else if (l%2==1) cout<<odd.query(1, n, 1, l, r)<<'\n';
            else cout<<even.query(1, n, 1, l, r)<<'\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 4440 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 4444 KB Output is correct
3 Correct 2 ms 4444 KB Output is correct
4 Correct 1 ms 4444 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 4440 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 4444 KB Output is correct
8 Correct 2 ms 4444 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Correct 3 ms 4700 KB Output is correct
12 Correct 3 ms 4700 KB Output is correct
13 Correct 3 ms 4700 KB Output is correct
14 Correct 3 ms 4700 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 105 ms 8660 KB Output is correct
2 Correct 113 ms 13396 KB Output is correct
3 Correct 108 ms 13396 KB Output is correct
4 Correct 102 ms 12952 KB Output is correct
5 Correct 109 ms 13200 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 4440 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 4444 KB Output is correct
8 Correct 2 ms 4444 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Correct 3 ms 4700 KB Output is correct
12 Correct 3 ms 4700 KB Output is correct
13 Correct 3 ms 4700 KB Output is correct
14 Correct 3 ms 4700 KB Output is correct
15 Correct 105 ms 8660 KB Output is correct
16 Correct 113 ms 13396 KB Output is correct
17 Correct 108 ms 13396 KB Output is correct
18 Correct 102 ms 12952 KB Output is correct
19 Correct 109 ms 13200 KB Output is correct
20 Correct 104 ms 13136 KB Output is correct
21 Correct 102 ms 13140 KB Output is correct
22 Correct 133 ms 13140 KB Output is correct
23 Correct 102 ms 13176 KB Output is correct
24 Correct 102 ms 13136 KB Output is correct