結果
| 問題 |
No.130 XOR Minimax
|
| コンテスト | |
| ユーザー |
threepipes_s
|
| 提出日時 | 2015-01-17 00:41:43 |
| 言語 | Java (openjdk 23) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 3,655 bytes |
| コンパイル時間 | 2,249 ms |
| コンパイル使用メモリ | 78,552 KB |
| 実行使用メモリ | 62,968 KB |
| 最終ジャッジ日時 | 2024-06-22 13:22:03 |
| 合計ジャッジ時間 | 6,750 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 1 WA * 2 |
| other | AC * 4 WA * 17 |
ソースコード
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
import java.util.PriorityQueue;
public class Main {
public static void main(String[] args) throws NumberFormatException, IOException{
ContestScanner in = new ContestScanner();
int n = in.nextInt();
long[] a = new long[n];
// PriorityQueue<Long> qu = new PriorityQueue<Long>();
long and = 0xffffffff;
long or = 0;
for(int i=0; i<n; i++){
a[i] = in.nextLong();
and &= a[i];
or |= a[i];
// qu.add(a[i]);
}
if(or == 0){
System.out.println(0);
return;
}
long xor = 0;
long tmp = or;
int j=0;
while(tmp > 0){
tmp >>= 1;
j++;
}
j--;
tmp = 0xffffffff;
while(j >= 0){
tmp <<= 1;
j--;
}
// System.err.println(~tmp);
xor |= and;
xor &= ~or & ~tmp;
long max = 0;
for(int i=0; i<n; i++){
long res = a[i] ^ xor;
if(res > max) max = res;
}
System.out.println(max);
// while(!qu.isEmpty()){
// long val = qu.poll();
// long next = qu.peek();
//
// }
}
}
class MyComp implements Comparator<int[]>{
public int compare(int[] a, int[] b) {
return a[0] - b[0];
}
}
//
//class Reverse implements Comparator<Integer>{
// public int compare(Integer arg0, Integer arg1) {
// return arg1 - arg0;
// }
//}
class Node implements Comparable<Node>{
int id;
int qNum;
int xor;
List<Node> edge = new ArrayList<Node>();
public Node(int id, int q, int xor){
this.id = id;
qNum = q;
this.xor = xor;
}
public void createEdge(Node node){
edge.add(node);
}
@Override
public int compareTo(Node n) {
return n.qNum - qNum;
}
}
class MyMath{
public final static double PIhalf = Math.PI/2.0;
public static double pAngle(double x, double y){
// ベクトル(1, 0)と(x, y)とのなす角を返す(rad:0 to 2pi)
if(x == 0){
if(y == 0){
System.err.println("pAngle error: zero vector.");
return 0;
}else if(y < 0){
return PIhalf*3.0;
}else{
return PIhalf;
}
}
double rad = Math.atan(y/x);
if(rad < 0){
rad += Math.PI*2.0;
}
return rad;
}
public static long fact(long n){
long res = 1;
while(n > 0){
res *= n--;
}
return res;
}
public static long[][] pascalT(int n){
long[][] tri = new long[n][];
for(int i=0; i<n; i++){
tri[i] = new long[i+1];
for(int j=0; j<i+1; j++){
if(j == 0 || j == i){
tri[i][j] = 1;
}else{
tri[i][j] = tri[i-1][j-1] + tri[i-1][j];
}
}
}
return tri;
}
// 最大公約数
static int gcd(int a, int b){
return b == 0 ? a : gcd(b, a % b);
}
// 最小公倍数
static int lcm(int a, int b){
return a * b / gcd(a, b);
}
}
class ContestScanner{
private BufferedReader reader;
private String[] line;
private int idx;
public ContestScanner() throws FileNotFoundException{
reader = new BufferedReader(new InputStreamReader(System.in));
}
public ContestScanner(String filename) throws FileNotFoundException{
reader = new BufferedReader(new InputStreamReader(new FileInputStream(filename)));
}
public String nextToken() throws IOException{
if(line == null || line.length <= idx){
line = reader.readLine().trim().split(" ");
idx = 0;
}
return line[idx++];
}
public long nextLong() throws IOException, NumberFormatException{
return Long.parseLong(nextToken());
}
public int nextInt() throws NumberFormatException, IOException{
return (int)nextLong();
}
public double nextDouble() throws NumberFormatException, IOException{
return Double.parseDouble(nextToken());
}
}
threepipes_s