Submission #3222892
Source Code Expand
import java.io.OutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.PrintWriter; import java.io.BufferedWriter; import java.util.Set; import java.util.HashMap; import java.util.InputMismatchException; import java.io.IOException; import java.util.TreeSet; import java.util.Map; import java.io.Writer; import java.io.OutputStreamWriter; import java.io.InputStream; /** * Built using CHelper plug-in * Actual solution is at the top * * @author prakharjain */ public class Main { public static void main(String[] args) { InputStream inputStream = System.in; OutputStream outputStream = System.out; InputReader in = new InputReader(inputStream); OutputWriter out = new OutputWriter(outputStream); agc014d solver = new agc014d(); solver.solve(1, in, out); out.close(); } static class agc014d { public void solve(int testNumber, InputReader in, OutputWriter out) { int n = in.nextInt(); Set[] g = new Set[n]; for (int i = 0; i < n; i++) { g[i] = new TreeSet(); } for (int i = 0; i < n - 1; i++) { int a = in.nextInt(); int b = in.nextInt(); a--; b--; g[a].add(b); g[b].add(a); } TreeSet<Integer> leaves = new TreeSet<>(); for (int i = 0; i < n; i++) { int l = 0; for (int v : (Set<Integer>) g[i]) { if (g[v].size() == 1) { l++; leaves.add(v); } } if (l > 1) { out.println("First"); return; } } // if (n % 2 == 1) { // out.println("First"); // } else { // out.println("Second"); // } Map<Integer, Integer> mp = new HashMap<>(); int rn = n; int lev = 0; while (rn > 0) { Map<Integer, Integer> nmp = new HashMap<>(); TreeSet<Integer> nleaves = new TreeSet<>(); for (int l : leaves) { if (g[l].size() <= 1) { if (g[l].size() == 1) { int v = ((TreeSet<Integer>) g[l]).first(); g[v].remove(l); nmp.merge(v, 1, (x, y) -> x + y); nleaves.add(v); } rn--; if (lev % 2 == 1 && mp.getOrDefault(l, 0) > 1) { out.println("First"); return; } } } leaves = nleaves; mp = nmp; lev++; } out.println("Second"); } } static class OutputWriter { private final PrintWriter writer; public OutputWriter(OutputStream outputStream) { writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(outputStream))); } public OutputWriter(Writer writer) { this.writer = new PrintWriter(writer); } public void print(Object... objects) { for (int i = 0; i < objects.length; i++) { if (i != 0) { writer.print(' '); } writer.print(objects[i]); } } public void println(Object... objects) { print(objects); writer.println(); } public void close() { writer.close(); } } static class InputReader { private InputStream stream; private byte[] buf = new byte[1024]; private int curChar; private int numChars; private InputReader.SpaceCharFilter filter; public InputReader(InputStream stream) { this.stream = stream; } public static boolean isWhitespace(int c) { return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1; } public int read() { if (numChars == -1) { throw new InputMismatchException(); } if (curChar >= numChars) { curChar = 0; try { numChars = stream.read(buf); } catch (IOException e) { throw new InputMismatchException(); } if (numChars <= 0) { return -1; } } return buf[curChar++]; } public int nextInt() { int c = read(); while (isSpaceChar(c)) { c = read(); } int sgn = 1; if (c == '-') { sgn = -1; c = read(); } int res = 0; do { if (c < '0' || c > '9') { throw new InputMismatchException(); } res *= 10; res += c - '0'; c = read(); } while (!isSpaceChar(c)); return res * sgn; } public boolean isSpaceChar(int c) { if (filter != null) { return filter.isSpaceChar(c); } return isWhitespace(c); } public interface SpaceCharFilter { public boolean isSpaceChar(int ch); } } }
Submission Info
Submission Time | |
---|---|
Task | D - Black and White Tree |
User | leashptntl |
Language | Java8 (OpenJDK 1.8.0) |
Score | 0 |
Code Size | 5925 Byte |
Status | WA |
Exec Time | 538 ms |
Memory | 73112 KB |
Compile Error
Note: ./Main.java uses unchecked or unsafe operations. Note: Recompile with -Xlint:unchecked for details.
Judge Result
Set Name | Sample | All | ||||||
---|---|---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 0 / 900 | ||||||
Status |
|
|
Set Name | Test Cases |
---|---|
Sample | sample1.txt, sample2.txt, sample3.txt |
All | sample1.txt, sample2.txt, sample3.txt, in1.txt, in10.txt, in11.txt, in12.txt, in13.txt, in14.txt, in15.txt, in16.txt, in17.txt, in18.txt, in19.txt, in2.txt, in20.txt, in21.txt, in22.txt, in23.txt, in24.txt, in25.txt, in26.txt, in27.txt, in28.txt, in29.txt, in3.txt, in30.txt, in31.txt, in32.txt, in33.txt, in4.txt, in5.txt, in6.txt, in7.txt, in8.txt, in9.txt, sample1.txt, sample2.txt, sample3.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
in1.txt | AC | 196 ms | 56728 KB |
in10.txt | AC | 192 ms | 54648 KB |
in11.txt | WA | 505 ms | 66668 KB |
in12.txt | WA | 240 ms | 26644 KB |
in13.txt | WA | 493 ms | 70040 KB |
in14.txt | WA | 457 ms | 68100 KB |
in15.txt | WA | 469 ms | 66720 KB |
in16.txt | WA | 494 ms | 68696 KB |
in17.txt | WA | 467 ms | 70460 KB |
in18.txt | WA | 445 ms | 66892 KB |
in19.txt | WA | 467 ms | 68548 KB |
in2.txt | AC | 188 ms | 53496 KB |
in20.txt | WA | 463 ms | 67228 KB |
in21.txt | AC | 199 ms | 56240 KB |
in22.txt | AC | 184 ms | 56832 KB |
in23.txt | AC | 191 ms | 55892 KB |
in24.txt | AC | 220 ms | 55152 KB |
in25.txt | AC | 186 ms | 56916 KB |
in26.txt | AC | 502 ms | 68824 KB |
in27.txt | AC | 197 ms | 55796 KB |
in28.txt | AC | 159 ms | 26452 KB |
in29.txt | AC | 491 ms | 70764 KB |
in3.txt | AC | 182 ms | 57020 KB |
in30.txt | AC | 511 ms | 73112 KB |
in31.txt | AC | 511 ms | 69880 KB |
in32.txt | AC | 538 ms | 68972 KB |
in33.txt | AC | 498 ms | 68536 KB |
in4.txt | AC | 183 ms | 55228 KB |
in5.txt | AC | 182 ms | 58128 KB |
in6.txt | AC | 203 ms | 55316 KB |
in7.txt | AC | 182 ms | 54712 KB |
in8.txt | AC | 182 ms | 55220 KB |
in9.txt | AC | 183 ms | 55708 KB |
sample1.txt | AC | 71 ms | 20820 KB |
sample2.txt | AC | 72 ms | 20820 KB |
sample3.txt | AC | 159 ms | 26196 KB |