oj.uz

Submission #446767

# Submission time Handle Problem Language Result Execution time Memory
446767 2021-07-23T08:40:24 Z fuad27 XORanges (eJOI19_xoranges) C++14
38 / 100
 629 ms 10200 KB 
#include<bits/stdc++.h>
using namespace std;
struct fenwick {
	int v[1000000] = {0};
	void update(int i, int val) {
		i++;
		while(i < 1000000) {
			v[i] ^= val;
			i += i&(-i);
		}
	}
	int getXor(int i) {
		int x = 0;
		while(i > 0) {
			x ^= v[i];
			i -= i & (-i);
		}
		return x;
	}
};
int main () {
	int n, q;
	cin >> n >> q;
	vector<int> v(n, 0);
	fenwick x;
	fenwick xodd;
	for(int i = 0;i<n;i++) {
		int p;
		cin >> p;
		v[i] = p;
		x.update(i, p);
		if(i%2 == 0) {
			xodd.update(i, p);
		}
	}
	while(q--) {
		int k;
		cin >> k;
		if(k == 1) {
			int i, val;
			cin >> i >> val;
			x.update(i, val ^ v[i-1]);
			if(i%2 == 1) {
				xodd.update(i, val ^ v[i-1]);
			}
			v[i-1] = val;
		}
		else {
			int l, u;
			cin >> l >> u;
			if((u - l)%2 == 0) {
				if(l%2 == 1) {
					int ans = xodd.getXor(u) ^ xodd.getXor(l-1);cout<<ans<<endl;
				}
				else {
					int ans = x.getXor(u) ^ xodd.getXor(u) ^ x.getXor(l-1) ^ xodd.getXor(l-1);cout<<ans<<endl;
 
				}
			}
			else {
				cout<<0<<endl;
			}
		}
	}
}

Subtask #1
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 8012 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 8064 KB Output is correct
2 Correct 6 ms 8012 KB Output is correct
3 Correct 6 ms 8012 KB Output is correct
4 Correct 6 ms 8012 KB Output is correct
5 Correct 7 ms 8012 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 8012 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 607 ms 10072 KB Output is correct
2 Correct 602 ms 10200 KB Output is correct
3 Correct 629 ms 10056 KB Output is correct
4 Correct 606 ms 10040 KB Output is correct
5 Correct 582 ms 10056 KB Output is correct

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 8012 KB Output isn't correct
2 Halted 0 ms 0 KB -