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Submission #453713

# Submission time Handle Problem Language Result Execution time Memory
453713 2021-08-04T15:53:29 Z keta_tsimakuridze XOR (IZhO12_xor) C++14
100 / 100
 218 ms 44356 KB 
#include<bits/stdc++.h>
#define f first
#define s second
#define int long long
#define pii pair<int,int>
using namespace std;
const int N = 3e5 + 5, mod = 1e9 + 7; // !
int t,aft[32*N][2],mn[32*N],id,a,n;
void add(int x,int ind) {
	int u = 0;
	for(int i=32;i>=0;i--) {
		int b = ((1ll<<i)&x ? 1 : 0);
		if(!aft[u][b]) {
			id++;
			mn[id] = ind;
			aft[u][b] = id;
		}
		u = aft[u][b];
	}
}
int get(int x) {
	int ans = n + 1,u = 0;
	for(int i=32;i>=0;i--) {
		int b = ((1ll<<i)&x ? 1 : 0);
		if(!((1ll<<i) & a)) {
			ans = min(ans,mn[aft[u][1-b]]);
			if(!aft[u][b]) return ans;
			u = aft[u][b];
			continue;
		}
		if(!aft[u][1-b]) return ans;
		u = aft[u][1-b];
	}
	ans = min(ans,mn[u]);
	return ans;
}
main(){
	cin >> n >> a;
	mn[0] = n + 1;
	int ans = 0,p = 0,ind = 0;
	add(0,0);
	for(int i=1;i<=n;i++) {
		int b;
		cin >> b;
		p ^= b;
		int x = i - get(p);
		if(x > ans) {
			ans = x;
			ind = i - x + 1;
		}
		ans = max(ans,i - get(p));
		add(p,i);
	}
	cout<<ind<<" "<<ans;
 }

Compilation message

xor.cpp:37:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   37 | main(){
      | ^~~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 13 ms 1464 KB Output is correct
6 Correct 14 ms 1540 KB Output is correct
7 Correct 15 ms 1628 KB Output is correct
8 Correct 16 ms 1660 KB Output is correct
9 Correct 72 ms 20804 KB Output is correct
10 Correct 72 ms 20972 KB Output is correct
11 Correct 80 ms 20860 KB Output is correct
12 Correct 74 ms 20860 KB Output is correct
13 Correct 76 ms 21008 KB Output is correct
14 Correct 79 ms 20916 KB Output is correct
15 Correct 74 ms 20992 KB Output is correct
16 Correct 81 ms 20904 KB Output is correct
17 Correct 209 ms 44304 KB Output is correct
18 Correct 195 ms 44296 KB Output is correct
19 Correct 203 ms 44356 KB Output is correct
20 Correct 218 ms 44328 KB Output is correct