Submission #85569

#	Time	Username	Problem	Language	Result	Execution time	Memory
85569		KCSC	Secret (JOI14_secret)	C++14	100 / 100	656 ms	6288 KiB

secret

#include <bits/stdc++.h>
using namespace std;

int Secret(int x, int y);
void Init(int n, int arr[]);
int Query(int le, int ri);
/*
int Secret(int x, int y) {
	return x xor y xor 13; }
*/

map<pair<int, int>, int> mmp;
int secret(int x, int y) {
	if (mmp.find(make_pair(x, y)) == mmp.end()) {
		mmp[make_pair(x, y)] = Secret(x, y); }
	return mmp[make_pair(x, y)]; }

const int DIM = 1005;
vector<int> lef[DIM * 4], rig[DIM * 4];

void build(int nd, int le, int ri, int arr[]) {
	if (le == ri) {
		lef[nd].resize(1, arr[le]); rig[nd].resize(1, arr[ri]); }
	else {
		int md = (le + ri) / 2;
		build(nd * 2, le, md, arr);	
		build(nd * 2 + 1, md + 1, ri, arr); 
		lef[nd].resize(ri - le + 1); lef[nd][md - le] = arr[md];
		rig[nd].resize(ri - le + 1); rig[nd][md + 1 - le] = arr[md + 1]; 
		for (int i = md - le - 1; i >= 0; --i) {
			lef[nd][i] = secret(arr[i + le], lef[nd][i + 1]); }
		for (int i = md - le + 2; i <= ri - le; ++i) {
			rig[nd][i] = secret(rig[nd][i - 1], arr[i + le]); } } }

int query(int nd, int le, int ri, int st, int en) {
	if (le == ri) {
		return lef[nd][0]; }
	else {
		int md = (le + ri) / 2;
		if (en <= md) {
			return query(nd * 2, le, md, st, en); }
		if (md <  st) {
			return query(nd * 2 + 1, md + 1, ri, st, en); }
		return secret(lef[nd][st - le], rig[nd][en - le]); } } 

int _n;
void Init(int n, int arr[]) {
	build(1, 0, n - 1, arr); _n = n; }

int Query(int le, int ri) {
	return query(1, 0, _n - 1, le, ri); }
/*
int arr[10];

int main(void) {
#ifdef HOME
	freopen("secret.in", "r", stdin);
	freopen("secret.out", "w", stdout);
#endif
	int n; cin >> n;
	for (int i = 0; i < n; ++i) {
		cin >> arr[i]; }
	Init(n, arr);
	int m; cin >> m;
	while (m--) {
		int le, ri; cin >> le >> ri;
		int val = arr[le];
		for (int i = le + 1; i <= ri; ++i) {
			val = Secret(val, arr[i]); }
		cout << Query(le, ri) << " " << val << "\n"; }
	return 0; }	
*/

• Subtask 1: 100 / 100