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Submission #637397

# Submission time Handle Problem Language Result Execution time Memory
637397 2022-09-01T15:55:06 Z kideso XORanges (eJOI19_xoranges) C++17
100 / 100
 565 ms 5588 KB 
#include <iostream>
#include <queue>

using namespace std;

vector<vector<int> > x;
int N, Q;

struct Segment_tree{
    vector<int> st;

    void init_segment_tree(int N){
        st.assign(4 * N + 1, 0);
    }

    void build_segment_tree(int p, int l, int r, int k){
        if(l == r){
            st[p] = x[k][l];
            return;
        }

        int m = (l + r) / 2;
        build_segment_tree(2 * p, l, m, k);
        build_segment_tree(2 * p + 1, m + 1, r, k);

        st[p] = st[2 * p] ^ st[2 * p + 1];
    }

    void update_segment_tree(int p, int l, int r, int k, int i){
        if(l == r){
            st[p] = x[k][l];
            return;
        }

        int m = (l + r) / 2;
        if(i <= m)
            update_segment_tree(2 * p, l, m, k, i);
        else
            update_segment_tree(2 * p + 1, m + 1, r, k, i);

        st[p] = st[2 * p] ^ st[2 * p + 1];
    }

    int range_query(int p, int l, int r, int ql, int qr){
        if(ql <= l && r <= qr)
            return st[p];
        
        if(r < ql || qr < l) return 0;

        int m = (r + l) / 2;
        
        return range_query(2 * p, l, m, ql, qr) ^ range_query(2 * p + 1, m + 1, r, ql, qr);
    }
};

int main(){
    cin >> N >> Q;

    x.assign(2, vector<int> ());

    x[0].push_back(0);
    x[1].push_back(0);
    int p;

    for(int i = 1; i <= N; ++i){
        cin >> p;
        x[i % 2].push_back(p);
    }

    Segment_tree stree[2];

    for(int i = 0; i < 2; ++i){
        stree[i].init_segment_tree(x[i].size());
        stree[i].build_segment_tree(1, 1, x[i].size() - 1, i);
    }

    int t, a, b;

    while(Q--){
        cin >> t >> a >> b;
        if(t == 1){
            x[a % 2][a / 2 + a % 2] = b;
            stree[a % 2].update_segment_tree(1, 1, x[a % 2].size() - 1, a % 2, a / 2 + a % 2);
        }
        else{
            if((b - a + 1) % 2 == 0){
                cout << 0 << '\n';
                continue;
            }
            else
                cout << stree[a % 2].range_query(1, 1, x[a % 2].size() - 1, a / 2 + a % 2, b / 2 + b % 2) << '\n';
        }
    }

    return 0;
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 2 ms 212 KB Output is correct
5 Correct 2 ms 212 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 2 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 2 ms 212 KB Output is correct
10 Correct 2 ms 212 KB Output is correct
11 Correct 14 ms 448 KB Output is correct
12 Correct 15 ms 340 KB Output is correct
13 Correct 13 ms 440 KB Output is correct
14 Correct 15 ms 340 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 516 ms 5584 KB Output is correct
2 Correct 565 ms 5516 KB Output is correct
3 Correct 535 ms 5532 KB Output is correct
4 Correct 546 ms 5588 KB Output is correct
5 Correct 532 ms 5516 KB Output is correct

Subtask #5
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 2 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 2 ms 212 KB Output is correct
10 Correct 2 ms 212 KB Output is correct
11 Correct 14 ms 448 KB Output is correct
12 Correct 15 ms 340 KB Output is correct
13 Correct 13 ms 440 KB Output is correct
14 Correct 15 ms 340 KB Output is correct
15 Correct 516 ms 5584 KB Output is correct
16 Correct 565 ms 5516 KB Output is correct
17 Correct 535 ms 5532 KB Output is correct
18 Correct 546 ms 5588 KB Output is correct
19 Correct 532 ms 5516 KB Output is correct
20 Correct 417 ms 5028 KB Output is correct
21 Correct 390 ms 4940 KB Output is correct
22 Correct 517 ms 4988 KB Output is correct
23 Correct 528 ms 5476 KB Output is correct
24 Correct 496 ms 5556 KB Output is correct