oj.uz

Submission #966862

# Submission time Handle Problem Language Result Execution time Memory
966862 2024-04-20T13:55:52 Z vjudge1 XORanges (eJOI19_xoranges) C++17
100 / 100
 121 ms 16920 KB 
#include<bits/stdc++.h>
#define INF 1e9
#define fi first
#define se second
#define FOR(i, k, n) for(int i = k; i <= n; i++)
#define FOR1(i, k, n) for(int i = k; i >= n; i--)
#define pb push_back
#define fastio ios::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define vi vector<int>
#define pii pair<int, int>
#define vii vector<pii>
#define ll long long
#define vll vector<ll>
#define pll pair<ll, ll>
#define re return 0
#define mii map<int, int>
#define input "DANCE.inp"
#define output "DANCE.out"
#define rf 	freopen(input, "r", stdin); freopen(output, "w", stdout)
using namespace std;
const int maxn = 2e5 + 5;
const int mod = 1e9 + 7;
pll T[maxn * 4];
int a[maxn];
void build(int id, int l, int r)
{
	if(l == r)
	{
		if(l % 2)
			T[id].fi = a[l], T[id].se = 0;
		else
			T[id].se = a[l], T[id].fi = 0;
		return;
	}
	int mid = (l + r) / 2;
	build(id * 2, l, mid);
	build(id * 2 + 1, mid + 1, r);
	T[id].fi = T[id * 2].fi ^ T[id * 2 + 1].fi;
	T[id].se = T[id * 2].se ^ T[id * 2 + 1].se;
}
void update(int id, int l, int r, int pos, int val)
{
	if(l == r)
	{
		if(pos % 2)
			T[id].fi = val;
		else
			T[id].se = val;
		return;
	}
	int mid = (l + r) / 2;
	if(pos <= mid)
		update(id * 2, l, mid, pos, val);
	else
		update(id * 2 + 1, mid + 1, r, pos, val);
	T[id].fi = T[id * 2].fi ^ T[id * 2 + 1].fi;
	T[id].se = T[id * 2].se ^ T[id * 2 + 1].se;
}
ll get1(int id, int l, int r, int u, int v)
{
	if(l > v || r < u)
		return 0;
	if(l >= u && r <= v)
		return T[id].fi;
	int mid = (l + r) / 2;
	return get1(id * 2, l, mid, u, v) ^ get1(id * 2 + 1, mid + 1, r, u, v);
}
ll get2(int id, int l, int r, int u, int v)
{
	if(l > v || r < u)
		return 0;
	if(l >= u && r <= v)
		return T[id].se;
	int mid = (l + r) / 2;
	return get2(id * 2, l, mid, u, v) ^ get2(id * 2 + 1, mid + 1, r, u, v);
}
int main()
{
	fastio;
	int n, q;
	cin >> n >> q;
	FOR(i, 1, n)
		cin >> a[i];
	build(1, 1, n);
	while(q--)
	{
		int op;
		cin >> op;
		if(op == 1)
		{
			int pos, val;
			cin >> pos >> val;
			update(1, 1, n, pos, val);
		}
		else
		{
			int l, r;
			cin >> l >> r;
			if((r - l + 1) % 2 == 0)
			{
				cout << "0\n";
				continue;
			}
			if(l % 2)
				cout << get1(1, 1, n, l, r) << "\n";
			else
				cout << get2(1, 1, n, l, r) << '\n';
		}
	}
	re;
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 2 ms 2648 KB Output is correct
5 Correct 1 ms 2512 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 2 ms 2648 KB Output is correct
5 Correct 1 ms 2512 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 3 ms 2652 KB Output is correct
12 Correct 3 ms 2652 KB Output is correct
13 Correct 2 ms 2652 KB Output is correct
14 Correct 3 ms 2652 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 95 ms 16860 KB Output is correct
2 Correct 95 ms 16852 KB Output is correct
3 Correct 121 ms 16920 KB Output is correct
4 Correct 91 ms 16468 KB Output is correct
5 Correct 88 ms 16488 KB Output is correct

Subtask #5
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 2 ms 2648 KB Output is correct
5 Correct 1 ms 2512 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 3 ms 2652 KB Output is correct
12 Correct 3 ms 2652 KB Output is correct
13 Correct 2 ms 2652 KB Output is correct
14 Correct 3 ms 2652 KB Output is correct
15 Correct 95 ms 16860 KB Output is correct
16 Correct 95 ms 16852 KB Output is correct
17 Correct 121 ms 16920 KB Output is correct
18 Correct 91 ms 16468 KB Output is correct
19 Correct 88 ms 16488 KB Output is correct
20 Correct 102 ms 16572 KB Output is correct
21 Correct 89 ms 16624 KB Output is correct
22 Correct 94 ms 16716 KB Output is correct
23 Correct 88 ms 16468 KB Output is correct
24 Correct 87 ms 16464 KB Output is correct