oj.uz

Submission #1080111

# Submission time Handle Problem Language Result Execution time Memory
1080111 2024-08-29T07:11:44 Z vjudge1 XORanges (eJOI19_xoranges) C++17
100 / 100
 87 ms 16368 KB 
//don't copy pls)
/*TAAK ZDES NADO RECURSIU PISAT*/

//I'm not in the danger i am the DANGER
#include "bits/stdc++.h"
#include <ext/pb_ds/assoc_container.hpp>
#define ll long long
#define pb push_back
#define int long long
#define F first
#define S second
#define all(x) (x).begin(), (x).end()
#define pii pair<int,int>
#define sigma signed
using namespace std;
using namespace __gnu_pbds;
const int N = 1e6 + 5;
int mod = 1e9 + 7;
const int INF = 1e18;
int n,q,a[N],t[2][N];
void build(int v = 1 , int tl = 1 , int tr = n){
	if(tl == tr){
		if(tl % 2){
			t[1][v] = a[tl];
		}
		else{
			t[0][v] = a[tl];
		}
		return;
	}
	int tm = tl + tr >> 1;
	build(v * 2 , tl , tm);
	build(v * 2 + 1 , tm + 1 , tr);
	t[0][v] = t[0][v * 2] ^ t[0][v * 2 + 1];
	t[1][v] = t[1][v * 2] ^ t[1][v * 2 + 1];
}
void upd(int pos , int x , int v = 1 , int tl = 1 , int tr = n){
	if(tl > pos || tr < pos) return;
	if(tl == pos && tr == pos){
		t[pos % 2][v] = x;
		return;
	}
	int tm = tl + tr >> 1;
	upd(pos , x , v * 2 , tl , tm);
	upd(pos , x , v * 2 + 1 , tm + 1 , tr);
	t[pos % 2][v] = t[pos % 2][v * 2] ^ t[pos % 2][v * 2 + 1];
}
int get(int id , int l , int r , int v = 1 , int tl = 1 , int tr = n){
	if(tl > r || tr < l) return 0;
	if(tl >= l && tr <= r) return t[id][v];
	int tm = tl + tr >> 1;
	return get(id , l , r , v * 2 , tl , tm) ^ get(id , l , r , v * 2 + 1 , tm + 1 , tr);
}
void Gold(){
	cin >> n >> q;
	for(int i = 1 ; i <= n ; i++){
		cin >> a[i];
	}
	build();
	while(q--){
		int tp;
		cin >> tp;
		if(tp == 1){
			int x,y;
			cin >> x >> y;
			upd(x , y);
		}
		else{
			int l,r;
			cin >> l >> r;
			if((r - l + 1) % 2 == 0){
				cout << 0 << '\n';
				continue;
			}
			cout << get((l % 2) , l , r) << '\n';
			continue;
			// int x = 0;
			// map <int,int> mp;
			// for(int i = l ; i <= r ; i++){
				// ans[i] = 0;
			// }
			// for(int i = 1 ; i <= n ; i++){
				// p[i] = p[i - 1] ^ a[i];
			// }
			// for(int j = 1 ; j <= r - l + 1 ; j++){
				// for(int i = l + j - 1 ; i <= r ; i++){
					// // x ^= get(1 , i - j + 1 , i) ^ get(0 , i - j + 1 , i);
					// // x ^= (p[i] ^ p[i - j]);
					// for(int k = i - j + 1 ; k <= i ; k++){
						// mp[a[k]]++;
						// x ^= a[k];
						// // cout << x << ' ';
					// }
					// // cout << '\n';
				// }
			// }
			// // cout << '\n';
			// for(auto it : mp){
				// cout << it.F << ' ' << it.S << '\n';
			// }
			// cout << x << '\n';
		}
	}
}
sigma main(){
	//freopen("txt.in","r",stdin);
	//freopen("txt.out","w",stdout);
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	srand(time(0));
	int TT = 1;
	// cin >> TT;
	for(int i = 1 ; i <= TT ; i++){
		//cout << "Case " << i << ": ";
		Gold();
	}
}

Compilation message

xoranges.cpp: In function 'void build(long long int, long long int, long long int)':
xoranges.cpp:31:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   31 |  int tm = tl + tr >> 1;
      |           ~~~^~~~
xoranges.cpp: In function 'void upd(long long int, long long int, long long int, long long int, long long int)':
xoranges.cpp:43:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   43 |  int tm = tl + tr >> 1;
      |           ~~~^~~~
xoranges.cpp: In function 'long long int get(long long int, long long int, long long int, long long int, long long int, long long int)':
xoranges.cpp:51:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   51 |  int tm = tl + tr >> 1;
      |           ~~~^~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 0 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 0 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Correct 3 ms 4700 KB Output is correct
12 Correct 2 ms 4700 KB Output is correct
13 Correct 4 ms 4700 KB Output is correct
14 Correct 3 ms 4696 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 86 ms 16176 KB Output is correct
2 Correct 82 ms 15956 KB Output is correct
3 Correct 87 ms 16368 KB Output is correct
4 Correct 77 ms 16140 KB Output is correct
5 Correct 75 ms 15952 KB Output is correct

Subtask #5
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 0 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4444 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Correct 3 ms 4700 KB Output is correct
12 Correct 2 ms 4700 KB Output is correct
13 Correct 4 ms 4700 KB Output is correct
14 Correct 3 ms 4696 KB Output is correct
15 Correct 86 ms 16176 KB Output is correct
16 Correct 82 ms 15956 KB Output is correct
17 Correct 87 ms 16368 KB Output is correct
18 Correct 77 ms 16140 KB Output is correct
19 Correct 75 ms 15952 KB Output is correct
20 Correct 82 ms 15480 KB Output is correct
21 Correct 81 ms 15356 KB Output is correct
22 Correct 79 ms 15448 KB Output is correct
23 Correct 79 ms 15956 KB Output is correct
24 Correct 86 ms 15876 KB Output is correct