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Submission #773994

# Submission time Handle Problem Language Result Execution time Memory
773994 2023-07-05T10:33:44 Z Tkm_algo XORanges (eJOI19_xoranges) C++17
100 / 100
 117 ms 11224 KB 
#include "bits/stdc++.h"
 
using namespace std;
using ll = long long;
 
struct node {
	int x;
};
 
struct segtree {
 
	vector<node> tree;
	int size;
	node def = {0};
	
	node combine(node a, node b) {
		return {a.x ^ b.x};
	}
 
	void init(int n) {
		size = 1;
		while (size < n) size *= 2;
		tree.assign(2 * size - 1, def);
	}
	
	void set(int i, node v, int x, int lx, int rx) {
		if (rx - lx == 1) {
			tree[x] = v;
			return;
		}
		int m = (lx + rx) / 2;
		if (i < m) {
			set(i, v, 2 * x + 1, lx, m);
		} else {
			set(i, v, 2 * x + 2, m, rx);
		}
		tree[x] = combine(tree[2 * x + 1], tree[2 * x + 2]);
	}
	
	void set(int i, node v) {
		set(i, v, 0, 0, size);
	}
	
	node res(int l, int r, int x, int lx, int rx) {
		if (l >= rx || lx >= r) {
			return def;
		}
		if (lx >= l && rx <= r) {
			return tree[x];
		}
		int m = (lx + rx) / 2;
		node s1 = res(l, r, 2 * x + 1, lx, m);
		node s2 = res(l, r, 2 * x + 2, m, rx);
		return combine(s1, s2);
	}
	
	node res(int l, int r) {
		return res(l, r, 0, 0, size);
	}
};
 
void solve() {
	int n, q;
	cin >> n >> q;
	vector<int> a(n);
	segtree st0, st1;
	st0.init(n);
	st1.init(n);
	for (int i = 0; i < n; i++) {
		cin >> a[i];
		if (i & 1) {
			st1.set(i, {a[i]});
		} else {
			st0.set(i, {a[i]});
		}
	}
	while (q--) {
		int c;
		cin >> c;
		if (c == 1) {
			int i, j;
			cin >> i >> j;
			if ((i - 1) & 1) {
				st1.set(i - 1, {j});
			} else {
				st0.set(i - 1, {j});
			}
		} else {
			int l, r;
			cin >> l >> r;
			if ((l & 1) != (r & 1)) {
				cout << "0\n";
			} else {
				if ((l - 1) & 1) {
					cout << st1.res(l - 1, r).x << '\n';
				} else  {
					cout << st0.res(l - 1, r).x << '\n';
				}
			}
		}
	}
}
 
int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	
	int test = 1;
	// cin >> test;
	
	while (test--) {
		solve();
	}
}

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 316 KB Output is correct
5 Correct 1 ms 340 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 328 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 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 316 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 328 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 3 ms 596 KB Output is correct
12 Correct 3 ms 596 KB Output is correct
13 Correct 3 ms 596 KB Output is correct
14 Correct 3 ms 596 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 105 ms 6372 KB Output is correct
2 Correct 117 ms 11212 KB Output is correct
3 Correct 103 ms 11224 KB Output is correct
4 Correct 99 ms 10844 KB Output is correct
5 Correct 101 ms 10832 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 316 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 328 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 3 ms 596 KB Output is correct
12 Correct 3 ms 596 KB Output is correct
13 Correct 3 ms 596 KB Output is correct
14 Correct 3 ms 596 KB Output is correct
15 Correct 105 ms 6372 KB Output is correct
16 Correct 117 ms 11212 KB Output is correct
17 Correct 103 ms 11224 KB Output is correct
18 Correct 99 ms 10844 KB Output is correct
19 Correct 101 ms 10832 KB Output is correct
20 Correct 102 ms 10976 KB Output is correct
21 Correct 104 ms 10956 KB Output is correct
22 Correct 100 ms 10968 KB Output is correct
23 Correct 100 ms 10792 KB Output is correct
24 Correct 101 ms 10832 KB Output is correct