結果
| 問題 | No.34 砂漠の行商人 |
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2015-02-19 00:49:10 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 1,427 ms / 5,000 ms |
| コード長 | 2,708 bytes |
| 記録 | |
| コンパイル時間 | 3,808 ms |
| コンパイル使用メモリ | 82,204 KB |
| 実行使用メモリ | 212,056 KB |
| 最終ジャッジ日時 | 2024-06-28 10:13:06 |
| 合計ジャッジ時間 | 14,073 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 26 |
ソースコード
package q0xx;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.InputMismatchException;
public class Q15_2 {
static InputStream is;
static PrintWriter out;
static String INPUT = "";
static void solve()
{
int n = ni(), v = ni();
int sc = ni()-1, sr = ni()-1;
int tc = ni()-1, tr = ni()-1;
int[][] a = new int[n][];
for(int i = 0;i < n;i++){
a[i] = na(n);
}
int lim = 9*(2*n-2);
v = Math.min(v, lim);
int[][][] dp = new int[v][n][n];
int I = 99999999;
for(int i = 0;i < v;i++){
for(int j = 0;j < n;j++){
Arrays.fill(dp[i][j], I);
}
}
int[] q = new int[lim*n*n+1];
int p = 0;
int o = 0;
q[p++] = 0<<14|sr<<7|sc;
dp[0][sr][sc] = 0;
int[] dr = { 1, 0, -1, 0 };
int[] dc = { 0, 1, 0, -1 };
int mind = I;
while(o < p){
int cur = q[o++];
int dmg = cur>>>14, r = cur>>>7&127, c = cur&127;
if(r == tr && c == tc && dp[dmg][tr][tc] < mind){
mind = dp[dmg][tr][tc];
}
if(dp[dmg][r][c]+1 < mind){
for(int k = 0;k < 4;k++){
int nr = r + dr[k], nc = c + dc[k];
if(nr >= 0 && nr < n && nc >= 0 && nc < n){
int ndmg = dmg + a[nr][nc];
if(ndmg < v && dp[ndmg][nr][nc] > dp[dmg][r][c] + 1){
dp[ndmg][nr][nc] = dp[dmg][r][c] + 1;
q[p++] = ndmg<<14|nr<<7|nc;
}
}
}
}
}
out.println(mind == I ? -1 : mind);
}
public static void main(String[] args) throws Exception
{
long S = System.currentTimeMillis();
is = INPUT.isEmpty() ? System.in : new ByteArrayInputStream(INPUT.getBytes());
out = new PrintWriter(System.out);
solve();
out.flush();
long G = System.currentTimeMillis();
tr(G-S+"ms");
}
private static byte[] inbuf = new byte[1024];
static int lenbuf = 0, ptrbuf = 0;
private static int readByte()
{
if(lenbuf == -1)throw new InputMismatchException();
if(ptrbuf >= lenbuf){
ptrbuf = 0;
try { lenbuf = is.read(inbuf); } catch (IOException e) { throw new InputMismatchException(); }
if(lenbuf <= 0)return -1;
}
return inbuf[ptrbuf++];
}
private static int[] na(int n)
{
int[] a = new int[n];
for(int i = 0;i < n;i++)a[i] = ni();
return a;
}
private static int ni()
{
int num = 0, b;
boolean minus = false;
while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-'));
if(b == '-'){
minus = true;
b = readByte();
}
while(true){
if(b >= '0' && b <= '9'){
num = num * 10 + (b - '0');
}else{
return minus ? -num : num;
}
b = readByte();
}
}
private static void tr(Object... o) { if(INPUT.length() != 0)System.out.println(Arrays.deepToString(o)); }
}