oj.uz

Submission #962492

# Submission time Handle Problem Language Result Execution time Memory
962492 2024-04-13T17:05:46 Z penguin133 XORanges (eJOI19_xoranges) C++17
100 / 100
 231 ms 58760 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long
#define pi pair<int, int>
#define pii pair<int, pi>
#define fi first
#define se second
#ifdef _WIN32
#define getchar_unlocked _getchar_nolock
#endif
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

struct node{
	int s, e, m, val;
	node *l, *r;
	node(int _s, int _e){
		s = _s, e = _e, m = (s + e) >> 1;
		if(s != e)l = new node(s, m), r = new node(m+1, e);
		val = 0;
	}
	void upd(int p, int v){
		if(s == e)val = v;
		else{
			if(p <= m)l->upd(p, v);
			else r->upd(p, v);
			val = l->val ^ r->val;
		}
	}
	int qry(int a, int b){
		if(a == s && b == e)return val;
		if(b <= m)return l->qry(a ,b);
		if(a > m)return r->qry(a ,b);
		return l->qry(a, m) ^ r->qry(m+1, b);
	}
}*odd, *even;

int n, q, A[500005];

void solve(){
	cin >> n >> q;
	for(int i = 1; i <= n; i++)cin >> A[i];
	odd = new node(1, n);
	even = new node(1, n);
	for(int i = 1; i <= n; i++){
		if(i % 2)odd->upd(i, A[i]);
		else even->upd(i, A[i]);
	}
	while(q--){
		int a, b, c; cin >> a >> b >> c;
		if(a == 1){
			if(b%2)odd->upd(b, c);
			else even->upd(b, c);
		}
		else{
			if(c%2 != b%2)cout << 0 << '\n';
			else cout << (b%2 ? odd->qry(b, c) : even->qry(b, c)) << '\n';
		}
	}
}

main(){
	ios::sync_with_stdio(0);cin.tie(0);
	int tc = 1;
	//cin >> tc;
	for(int tc1=1;tc1<=tc;tc1++){
		// cout << "Case #" << tc1 << ": ";
		solve();
	}
}

Compilation message

xoranges.cpp:62:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   62 | main(){
      | ^~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 468 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 468 KB Output is correct
6 Correct 1 ms 600 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 3 ms 1884 KB Output is correct
12 Correct 3 ms 1884 KB Output is correct
13 Correct 3 ms 1884 KB Output is correct
14 Correct 3 ms 1884 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 225 ms 58592 KB Output is correct
2 Correct 208 ms 58760 KB Output is correct
3 Correct 202 ms 58644 KB Output is correct
4 Correct 138 ms 58356 KB Output is correct
5 Correct 139 ms 58360 KB Output is correct

Subtask #5
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 468 KB Output is correct
6 Correct 1 ms 600 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 3 ms 1884 KB Output is correct
12 Correct 3 ms 1884 KB Output is correct
13 Correct 3 ms 1884 KB Output is correct
14 Correct 3 ms 1884 KB Output is correct
15 Correct 225 ms 58592 KB Output is correct
16 Correct 208 ms 58760 KB Output is correct
17 Correct 202 ms 58644 KB Output is correct
18 Correct 138 ms 58356 KB Output is correct
19 Correct 139 ms 58360 KB Output is correct
20 Correct 231 ms 58344 KB Output is correct
21 Correct 207 ms 58452 KB Output is correct
22 Correct 217 ms 58444 KB Output is correct
23 Correct 146 ms 58536 KB Output is correct
24 Correct 152 ms 58348 KB Output is correct