oj.uz

Submission #673977

# Submission time Handle Problem Language Result Execution time Memory
673977 2022-12-22T13:31:47 Z QwertyPi XOR Sum (info1cup17_xorsum) C++14
0 / 100
 1600 ms 26320 KB 
#include <bits/stdc++.h>
#define int long long
using namespace std;

const int N = 1e6 + 11;
int a[N], b0[N], b0n, b1[N], b1n;

int32_t main(){
	int n; cin >> n;
	for(int i = 0; i < n; i++){
		cin >> a[i];
	}
	int ans = 0;
	for(int s = 0; s <= 29; s++){
		int c = 0;
		b0n = b1n = 0;
		for(int j = 0; j < n; j++){
			if(a[j] & (1 << s)) b0[b0n++] = a[j] % (1 << s);
			else b1[b1n++] = a[j] % (1 << s);
		}
		sort(b0, b0 + b0n); sort(b1, b1 + b1n);
		int r = b0n;
		for(int l = 0; l < b0n; l++){
			r = max(r, l + 1);
			while(r - 1 > l && b0[l] + b0[r - 1] >= (1 << s)) r--;
			c += b0n - r;
		}
		r = b1n;
		for(int l = 0; l < b1n; l++){
			r = max(r, l + 1);
			while(r - 1 > l && b1[l] + b1[r - 1] >= (1 << s)) r--;
			c += b1n - r;
		}
		
		r = b1n;
		for(int l = 0; l < b0n; l++){
			r = min(b1n, max(r, l + 1));
			while(r - 1 > l && b0[l] + b1[r - 1] >= (1 << s)) r--;
			c += b1n - r;
		}
		c += b0n * b1n;
		
		ans ^= (1 << s) * (c % 2); 
	}
	cout << ans << endl;
}

Subtask #1
0 / 7.0

# Verdict Execution time Memory Grader output
1 Incorrect 9 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1677 ms 26320 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1677 ms 26320 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 38.0

# Verdict Execution time Memory Grader output
1 Incorrect 9 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 9 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -