oj.uz

Submission #763328

# Submission time Handle Problem Language Result Execution time Memory
763328 2023-06-22T08:13:33 Z Halym2007 XORanges (eJOI19_xoranges) C++11
100 / 100
 119 ms 15828 KB 
#include <bits/stdc++.h>
#define ff first
#define ss second
#define sz size()
#define pb push_back
using namespace std;
typedef long long ll;
const int N = 600005;
// const int mod = 1e9+7;
// ll bigmod(ll a,ll b) {ll res=1;a%=mod; assert(b>=0); for(;b;b>>=1){if(b&1)res=res*a%mod;a=a*a%mod;}return res;}
void solve();
int n, q;
ll a[200005], sum, st[N][2];


void build (int ind, int x, int y) {
	if (x == y) {
		if (x % 2 == 1) {
			st[ind][1] = a[x]; 
		}
		else {
			st[ind][0] = a[x];
		}
		return;
	}
	build (ind * 2, x, (x + y) / 2);
	build (ind * 2 + 1, (x + y) / 2 + 1, y);
	st[ind][0] = st[ind * 2][0] ^ st[ind * 2 + 1][0];
	st[ind][1] = st[ind * 2][1] ^ st[ind * 2 + 1][1];
}	



void update (int ind, int l, int r, int x, int y, int op) {
	if (l == r and l == x) {
		st[ind][op] = y;
		return;
	}
	if(x < l or r < x) return;
	update(ind * 2, l, (l + r) / 2, x, y, op);
	update(ind * 2 + 1, (l + r) / 2 + 1, r, x, y, op);
	st[ind][op] = st[ind * 2][op] ^ st[ind * 2 + 1][op];
}


void jogap (int ind, int l, int r, int x, int y, int op) {
	if (r < x or y < l) return;
	if (x <= l and r <= y) {
		sum ^= st[ind][op];
		return;
	}
	jogap (ind * 2, l, (l + r) / 2, x, y, op);
	jogap (ind * 2 + 1, (l + r) / 2 + 1, r, x, y, op);
}


int main() {
	ios::sync_with_stdio(false);
 	cin.tie(0), cout.tie(0);
    // freopen("input.txt", "r", stdin);
    // freopen("output.txt", "w", stdout);
    //  clock_t tStart = clock();
    // printf("Time taken: %.2fs\n", (double)(clock() - tStart)/CLOCKS_PER_SEC);
	cin >> n >> q;
	for (int i = 1; i <= n; ++i) {
		cin >> a[i];
	}
	build (1, 1, n);
	while ( q-- ) {
		int x, l, r;
		cin >> x >> l >> r;
		if (x == 2)
			if ((l % 2) != (r % 2)) {
				cout << "0\n";
				continue;
			}
		if (n <= 5000 and q <= 5000) {
			if (x == 1) {
				a[l] = r;
				continue;
			}
			sum = 0;
			for (int i = l; i <= r; i += 2) {
				sum ^= a[i];		
			}
			cout << sum << "\n";
			continue;
		}
		if (x == 1) {
			a[l] = r;
			update (1, 1, n, l, r, l % 2);
		}
		else {
			sum = 0;
			jogap (1, 1, n, l, r, l % 2);
			cout << sum << "\n";
		}
	}
}
/*
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*/

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 328 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 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 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 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 0 ms 340 KB Output is correct
2 Correct 1 ms 328 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 3 ms 724 KB Output is correct
12 Correct 3 ms 728 KB Output is correct
13 Correct 4 ms 724 KB Output is correct
14 Correct 5 ms 768 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 96 ms 11268 KB Output is correct
2 Correct 94 ms 11200 KB Output is correct
3 Correct 94 ms 11208 KB Output is correct
4 Correct 82 ms 11220 KB Output is correct
5 Correct 90 ms 11228 KB Output is correct

Subtask #5
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 328 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 3 ms 724 KB Output is correct
12 Correct 3 ms 728 KB Output is correct
13 Correct 4 ms 724 KB Output is correct
14 Correct 5 ms 768 KB Output is correct
15 Correct 96 ms 11268 KB Output is correct
16 Correct 94 ms 11200 KB Output is correct
17 Correct 94 ms 11208 KB Output is correct
18 Correct 82 ms 11220 KB Output is correct
19 Correct 90 ms 11228 KB Output is correct
20 Correct 119 ms 15784 KB Output is correct
21 Correct 106 ms 15760 KB Output is correct
22 Correct 100 ms 15828 KB Output is correct
23 Correct 84 ms 15760 KB Output is correct
24 Correct 86 ms 15752 KB Output is correct