結果
| 問題 | No.20 砂漠のオアシス |
| ユーザー |
 atn112323
|
| 提出日時 | 2016-02-07 15:31:55 |
| 言語 | Java21 (openjdk 21) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 12,820 bytes |
| コンパイル時間 | 3,424 ms |
| コンパイル使用メモリ | 90,088 KB |
| 実行使用メモリ | 56,572 KB |
| 最終ジャッジ日時 | 2024-10-13 05:32:24 |
| 合計ジャッジ時間 | 6,451 ms |
|
ジャッジサーバーID （参考情報） |
judge3 / judge5 |
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テストケース
テストケース表示| 入力 | 結果 | 実行時間 実行使用メモリ |
|---|---|---|
| testcase_00 | AC | 56 ms
50,444 KB |
| testcase_01 | AC | 57 ms
50,588 KB |
| testcase_02 | AC | 58 ms
50,544 KB |
| testcase_03 | AC | 77 ms
51,616 KB |
| testcase_04 | AC | 78 ms
51,708 KB |
| testcase_05 | AC | 153 ms
55,028 KB |
| testcase_06 | AC | 181 ms
55,856 KB |
| testcase_07 | WA | - |
| testcase_08 | AC | 177 ms
55,616 KB |
| testcase_09 | AC | 189 ms
56,276 KB |
| testcase_10 | WA | - |
| testcase_11 | AC | 56 ms
50,432 KB |
| testcase_12 | AC | 82 ms
51,800 KB |
| testcase_13 | AC | 94 ms
51,716 KB |
| testcase_14 | WA | - |
| testcase_15 | WA | - |
| testcase_16 | WA | - |
| testcase_17 | AC | 113 ms
52,376 KB |
| testcase_18 | WA | - |
| testcase_19 | AC | 115 ms
52,500 KB |
| testcase_20 | WA | - |
ソースコード
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.PriorityQueue;
public class Main {
/**
* This class represents a problem setting.
*/
class Problem implements IProblem {
int[] NVOO;
int[][] L;
@Override
public void set(ProblemReader reader) throws IOException {
NVOO = reader.nextIntArray();
L = reader.nextIntArray2(NVOO[0]);
}
@Override
public String toString() {
// TODO
return null;
}
}
/**
* Solver for the problem.
* It's the most important part of codes in this file.
*/
class Solver implements IProblemSolver<Problem> {
int inf = 1000000;
int[] DX = new int[]{1, 0, -1, 0};
int[] DY = new int[]{0, 1, 0, -1};
@Override
public String solve(Problem problem) {
int N = problem.NVOO[0], V = problem.NVOO[1], OX = problem.NVOO[2], OY = problem.NVOO[3];
int[][] L = problem.L;
return solve(N, V, OX, OY, L) ? "YES" : "NO";
}
private boolean solve(int N, int V, int OX, int OY, int[][] L) {
if (shortest(N, L, 0, 0, N - 1, N - 1) <= V) {
return true;
}
if (OX > 0 && OY > 0) {
int dist0 = shortest(N, L, 0, 0, OX - 1, OY - 1);
if (dist0 > V) {
return false;
}
V -= dist0;
V *= 2;
return shortest(N, L, OX - 1, OY - 1, N - 1, N - 1) <= V;
}
return false;
}
private int shortest(int N, int[][] L, int sx, int sy, int tx, int ty) {
int[][] dist = new int[N][N];
for (int i = 0; i < N; i++) {
for (int j = 0; j < N; j++) {
dist[i][j] = inf;
}
}
PriorityQueue<Vertex> que = new PriorityQueue<>();
dist[0][0] = 0;
que.add(new Vertex(0, 0, 0));
while (que.size() > 0) {
Vertex v = que.poll();
if (v.dist > dist[v.x][v.y]) {
continue;
}
if (v.x == tx && v.y == ty) {
break;
}
for (int d = 0; d < 4; d++) {
int xx = v.x + DX[d], yy = v.y + DY[d];
if (0 <= xx && xx < N && 0 <= yy && yy < N && v.dist + L[yy][xx] < dist[xx][yy]) {
dist[xx][yy] = v.dist + L[yy][xx];
que.add(new Vertex(xx, yy, dist[xx][yy]));
}
}
}
return dist[tx][ty];
}
class Vertex implements Comparable<Vertex> {
int x, y;
int dist;
Vertex(int x, int y, int dist) {
this.x = x;
this.y = y;
this.dist = dist;
}
@Override
public int compareTo(Vertex v) {
if (dist != v.dist) {
return dist - v.dist;
} else if (x != v.x) {
return x - v.x;
} else {
return y - v.y;
}
}
}
}
/**
* This class is a solver to confirm the main solver.
* This solver often works only for a problem with a small number setting.
*/
class Solver2 implements IProblemSolver<Problem> {
@Override
public String solve(Problem problem) {
// TODO
return null;
}
}
class Factory implements IProblemFactory<Problem> {
@Override
public Problem newProblem() {
// TODO
return null;
}
@Override
public Problem newProblem(ProblemReader reader) throws IOException {
Problem problem = new Problem();
problem.set(reader);
return problem;
}
}
ProblemProcessor<Problem> processor;
Main() {
Init();
}
void Init() {
ProblemProcessorConfig<Problem> config = new ProblemProcessorConfig<>();
config.factory = new Factory();
config.solver = new Solver();
config.solver2 = new Solver2();
processor = new ProblemProcessor<Problem>(config);
}
void process(String mode) throws IOException {
processor.process(mode);
}
public static void main(String args[]) throws IOException {
String mode = "solve";
new Main().process(mode);
}
/*
Common library
*/
interface IProblem {
abstract void set(ProblemReader reader) throws IOException;
}
interface IProblemFactory<P extends IProblem> {
abstract P newProblem();
abstract P newProblem(ProblemReader reader) throws IOException;
}
interface IProblemSolver<P extends IProblem> {
abstract String solve(P problem);
}
class ProblemReader {
BufferedReader br = null;
ProblemReader() {
br = new BufferedReader(new InputStreamReader(System.in));
}
int nextInt() throws IOException {
return StringUtils.toInt(br.readLine());
}
long nextLong() throws IOException {
return StringUtils.toLong(br.readLine());
}
double nextDouble() throws IOException {
return StringUtils.toDouble(br.readLine());
}
String nextString() throws IOException {
return br.readLine();
}
int[] nextIntArray() throws IOException {
return StringUtils.toIntArray(br.readLine());
}
long[] nextLongArray() throws IOException {
return StringUtils.toLongArray(br.readLine());
}
double[] nextDoubleArray() throws IOException {
return StringUtils.toDoubleArray(br.readLine());
}
String[] nextStringArray() throws IOException {
return StringUtils.toStringArray(br.readLine());
}
int[] nextIntArray(int n) throws IOException {
int[] a = new int[n];
for (int i = 0; i < n; i++) {
a[i] = nextInt();
}
return a;
}
long[] nextLongArray(int n) throws IOException {
long[] a = new long[n];
for (int i = 0; i < n; i++) {
a[i] = nextLong();
}
return a;
}
double[] nextDoubleArray(int n) throws IOException {
double[] a = new double[n];
for (int i = 0; i < n; i++) {
a[i] = nextDouble();
}
return a;
}
String[] nextStringArray(int n) throws IOException {
String[] strs = new String[n];
for (int i = 0; i < n; i++) {
strs[i] = nextString();
}
return strs;
}
int[][] nextIntArray2(int n) throws IOException {
int[][] a = new int[n][];
for (int i = 0; i < n; i++) {
a[i] = nextIntArray();
}
return a;
}
long[][] nextLongArray2(int n) throws IOException {
long[][] a = new long[n][];
for (int i = 0; i < n; i++) {
a[i] = nextLongArray();
}
return a;
}
double[][] nextDoubleArray2(int n) throws IOException {
double[][] a = new double[n][];
for (int i = 0; i < n; i++) {
a[i] = nextDoubleArray();
}
return a;
}
String[][] nextStringArray2(int n) throws IOException {
String[][] strs = new String[n][];
for (int i = 0; i < n; i++) {
strs[i] = nextStringArray();
}
return strs;
}
void close() throws IOException {
if (br != null) {
br.close();
}
}
}
class ProblemCreator<P extends IProblem> {
IProblemFactory<P> factory;
ProblemCreator(IProblemFactory<P> factory) {
this.factory = factory;
}
void create() throws FileNotFoundException {
P problem = factory.newProblem();
System.out.println(problem.toString());
}
}
class ProblemSolverComparator<P extends IProblem> {
IProblemFactory<P> factory;
IProblemSolver<P> solver1, solver2;
ProblemSolverComparator(IProblemFactory<P> factory, IProblemSolver<P> solver1, IProblemSolver<P> solver2) {
this.factory = factory;
this.solver1 = solver1;
this.solver2 = solver2;
}
void compare() throws IOException {
ProblemReader reader = null;
try {
reader = new ProblemReader();
P problem = factory.newProblem(reader);
String res1 = solver1.solve(problem);
String res2 = solver2.solve(problem);
if (res1.equals(res2)) {
System.out.println(res1);
} else {
System.err.println(res1 + " " + res2);
}
} finally {
if (reader != null) {
reader.close();
}
}
}
}
class ProblemAnswerer<P extends IProblem> {
IProblemFactory<P> factory;
IProblemSolver<P> solver;
ProblemAnswerer(IProblemFactory<P> factory, IProblemSolver<P> solver) {
this.factory = factory;
this.solver = solver;
}
void answer() throws IOException {
ProblemReader reader = null;
try {
reader = new ProblemReader();
P problem = factory.newProblem(reader);
String res = solver.solve(problem);
System.out.println(res);
} finally {
if (reader != null) {
reader.close();
}
}
}
}
class ProblemProcessorConfig<P extends IProblem> {
IProblemFactory<P> factory;
IProblemSolver<P> solver, solver2;
}
class ProblemProcessor<P extends IProblem> {
ProblemProcessorConfig<P> config;
ProblemCreator<P> creator;
ProblemSolverComparator<P> comparator;
ProblemAnswerer<P> answerer;
ProblemProcessor(ProblemProcessorConfig<P> config) {
this.config = config;
creator = new ProblemCreator<P>(config.factory);
comparator = new ProblemSolverComparator<P>(config.factory, config.solver, config.solver2);
answerer = new ProblemAnswerer<P>(config.factory, config.solver);
}
void process(String mode) throws IOException {
switch (mode) {
case "create":
creator.create();
break;
case "debug":
comparator.compare();
break;
case "solve":
answerer.answer();
break;
}
}
}
static class StringUtils {
static String toString(int a) {
return String.valueOf(a);
}
static String toString(long a) {
return String.valueOf(a);
}
static String toString(double a) {
return String.valueOf(a);
}
static String toString(String str) {
return str;
}
static String toString(int[] a) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < a.length; i++) {
if (i < a.length - 1) {
sb.append(a[i] + " ");
} else {
sb.append(a[i]);
}
}
return sb.toString();
}
static String toString(long[] a) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < a.length; i++) {
if (i < a.length - 1) {
sb.append(a[i] + " ");
} else {
sb.append(a[i]);
}
}
return sb.toString();
}
static String toString(double[] a) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < a.length; i++) {
if (i < a.length - 1) {
sb.append(a[i] + " ");
} else {
sb.append(a[i]);
}
}
return sb.toString();
}
static String toString(String[] strs) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < strs.length; i++) {
if (i < strs.length - 1) {
sb.append(strs[i] + " ");
} else {
sb.append(strs[i]);
}
}
return sb.toString();
}
static String toString(int[][] a) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < a.length; i++) {
for (int j = 0; j < a[i].length; j++) {
if (j < a[i].length - 1) {
sb.append(a[i][j] + " ");
} else {
sb.append(a[i][j]);
}
}
sb.append("\n");
}
sb.setLength(sb.length() - 1);
return sb.toString();
}
static String toString(long[][] a) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < a.length; i++) {
for (int j = 0; j < a[i].length; j++) {
if (j < a[i].length - 1) {
sb.append(a[i][j] + " ");
} else {
sb.append(a[i][j]);
}
}
sb.append("\n");
}
sb.setLength(sb.length() - 1);
return sb.toString();
}
static String toString(double[][] a) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < a.length; i++) {
for (int j = 0; j < a[i].length; j++) {
if (j < a[i].length - 1) {
sb.append(a[i][j] + " ");
} else {
sb.append(a[i][j]);
}
}
sb.append("\n");
}
sb.setLength(sb.length() - 1);
return sb.toString();
}
static String toString(String[][] a) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < a.length; i++) {
for (int j = 0; j < a[i].length; j++) {
if (j < a[i].length - 1) {
sb.append(a[i][j] + " ");
} else {
sb.append(a[i][j]);
}
}
sb.append("\n");
}
sb.setLength(sb.length() - 1);
return sb.toString();
}
static int toInt(String s) throws IOException {
return Integer.parseInt(s);
}
static long toLong(String s) throws IOException {
return Long.parseLong(s);
}
static double toDouble(String s) throws IOException {
return Double.parseDouble(s);
}
static int[] toIntArray(String s) throws IOException {
String[] tokens = s.split(" ");
int[] a = new int[tokens.length];
for (int i = 0; i < tokens.length; i++) {
a[i] = Integer.parseInt(tokens[i]);
}
return a;
}
static long[] toLongArray(String s) throws IOException {
String[] tokens = s.split(" ");
long[] a = new long[tokens.length];
for (int i = 0; i < tokens.length; i++) {
a[i] = Long.parseLong(tokens[i]);
}
return a;
}
static double[] toDoubleArray(String s) throws IOException {
String[] tokens = s.split(" ");
double[] a = new double[tokens.length];
for (int i = 0; i < tokens.length; i++) {
a[i] = Double.parseDouble(tokens[i]);
}
return a;
}
static String[] toStringArray(String s) throws IOException {
return s.split(" ");
}
}
}