Submission #1100472

#	Time	Username	Problem	Language	Result	Execution time	Memory
1100472		anhphant	Secret (JOI14_secret)	C++14	100 / 100	312 ms	4936 KiB

secret

#include <bits/stdc++.h>
#include "secret.h"
using namespace std;
typedef long long  ll;

int N, A[1000007], Q;
ll dat[17][1007], mask[1007];
vector<ll> v;

// int Secret(int a, int b) {
// 	return a + b;
// }

void divi(ll l, ll r, ll lev, int A[]) {
	if (l == r) return;
	ll mid = (l + r) / 2;
	dat[lev][mid] = A[mid];
	for(int i = mid - 1; i >= l; --i) {
		dat[lev][i] = Secret(A[i], dat[lev][i + 1]);
	}
	dat[lev][mid + 1] = A[mid + 1];
	for(int i = mid + 2; i <= r; ++i) {
		dat[lev][i] = Secret(dat[lev][i - 1], A[i]);
	}
	for(int i = mid + 1; i <= r; ++i) mask[i] ^= (1 << lev);
	divi(l, mid, lev + 1, A);
	divi(mid + 1, r, lev + 1, A);
}

void Init(int N, int a[]) {
	for(int i = 1; i <= N; ++i) A[i] = a[i - 1];
	divi(1, N, 0, A);
	for(int i = 1; i <= N; ++i) v.push_back(A[i]);
}

int Query(int l, int r) {
	l++;
	r++;
	if (l == r) return v[l - 1];
	int bits = __builtin_ctz(mask[l] ^ mask[r]);
	return Secret(dat[bits][l], dat[bits][r]);
}

• Subtask 1: 100 / 100