Submission #2832111
Source Code Expand
import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.util.StringTokenizer; public class Main { static int N; static int[] A; public static void main(String[] args) { FastScanner sc = new FastScanner(System.in); N = sc.nextInt(); A = sc.nextIntArray(N); System.out.println( solve() ); } static int solve() { // xor=0で順番が回ってくると負ける // 相手が先手なのでxor=0の状態を作れるかどうかになる int xor = 0; int eatableBits = 0; for (int a : A) { xor ^= a; eatableBits |= Integer.lowestOneBit(a); } int answer = 0; while(xor != 0) { int high = Integer.highestOneBit(xor); if( (high & eatableBits) != 0 ) { xor ^= high; xor ^= high-1; answer++; } else { return -1; } } return answer; } @SuppressWarnings("unused") static class FastScanner { private BufferedReader reader; private StringTokenizer tokenizer; FastScanner(InputStream in) { reader = new BufferedReader(new InputStreamReader(in)); tokenizer = null; } String next() { if (tokenizer == null || !tokenizer.hasMoreTokens()) { try { tokenizer = new StringTokenizer(reader.readLine()); } catch (IOException e) { throw new RuntimeException(e); } } return tokenizer.nextToken(); } String nextLine() { if (tokenizer == null || !tokenizer.hasMoreTokens()) { try { return reader.readLine(); } catch (IOException e) { throw new RuntimeException(e); } } return tokenizer.nextToken("\n"); } long nextLong() { return Long.parseLong(next()); } int nextInt() { return Integer.parseInt(next()); } double nextDouble() { return Double.parseDouble(next()); } int[] nextIntArray(int n) { int[] a = new int[n]; for (int i = 0; i < n; i++) a[i] = nextInt(); return a; } long[] nextLongArray(int n) { long[] a = new long[n]; for (int i = 0; i < n; i++) a[i] = nextLong(); return a; } } }
Submission Info
Submission Time | |
---|---|
Task | C - Cheating Nim |
User | kusomushi |
Language | Java8 (OpenJDK 1.8.0) |
Score | 500 |
Code Size | 2814 Byte |
Status | AC |
Exec Time | 182 ms |
Memory | 36384 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 500 / 500 | ||||
Status |
|
|
Set Name | Test Cases |
---|---|
Sample | example0.txt, example1.txt |
All | 000.txt, 001.txt, 002.txt, 003.txt, 004.txt, 005.txt, 006.txt, 007.txt, 008.txt, 009.txt, 010.txt, 011.txt, 012.txt, 013.txt, 014.txt, 015.txt, 016.txt, 017.txt, 018.txt, 019.txt, 020.txt, 021.txt, 022.txt, 023.txt, example0.txt, example1.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
000.txt | AC | 69 ms | 19280 KB |
001.txt | AC | 71 ms | 20948 KB |
002.txt | AC | 175 ms | 35904 KB |
003.txt | AC | 143 ms | 28540 KB |
004.txt | AC | 149 ms | 29120 KB |
005.txt | AC | 137 ms | 28784 KB |
006.txt | AC | 176 ms | 32548 KB |
007.txt | AC | 182 ms | 34272 KB |
008.txt | AC | 170 ms | 34212 KB |
009.txt | AC | 168 ms | 34728 KB |
010.txt | AC | 173 ms | 32356 KB |
011.txt | AC | 172 ms | 30908 KB |
012.txt | AC | 173 ms | 32212 KB |
013.txt | AC | 182 ms | 32724 KB |
014.txt | AC | 175 ms | 34284 KB |
015.txt | AC | 175 ms | 32724 KB |
016.txt | AC | 179 ms | 34016 KB |
017.txt | AC | 176 ms | 31796 KB |
018.txt | AC | 173 ms | 36384 KB |
019.txt | AC | 169 ms | 33536 KB |
020.txt | AC | 169 ms | 34772 KB |
021.txt | AC | 105 ms | 21332 KB |
022.txt | AC | 106 ms | 21204 KB |
023.txt | AC | 175 ms | 30752 KB |
example0.txt | AC | 67 ms | 18388 KB |
example1.txt | AC | 69 ms | 18644 KB |