結果
問題 | No.20 砂漠のオアシス |
ユーザー | holeguma |
提出日時 | 2015-08-30 23:24:29 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 218 ms / 5,000 ms |
コード長 | 3,836 bytes |
コンパイル時間 | 2,530 ms |
コンパイル使用メモリ | 82,620 KB |
実行使用メモリ | 61,300 KB |
最終ジャッジ日時 | 2024-10-13 05:25:50 |
合計ジャッジ時間 | 5,598 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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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
50,088 KB |
testcase_01 | AC | 57 ms
50,244 KB |
testcase_02 | AC | 55 ms
50,112 KB |
testcase_03 | AC | 70 ms
50,640 KB |
testcase_04 | AC | 71 ms
50,764 KB |
testcase_05 | AC | 218 ms
60,820 KB |
testcase_06 | AC | 204 ms
51,896 KB |
testcase_07 | AC | 209 ms
51,756 KB |
testcase_08 | AC | 174 ms
60,284 KB |
testcase_09 | AC | 206 ms
61,300 KB |
testcase_10 | AC | 56 ms
50,228 KB |
testcase_11 | AC | 56 ms
49,884 KB |
testcase_12 | AC | 74 ms
50,900 KB |
testcase_13 | AC | 88 ms
50,984 KB |
testcase_14 | AC | 88 ms
51,584 KB |
testcase_15 | AC | 92 ms
51,236 KB |
testcase_16 | AC | 105 ms
53,804 KB |
testcase_17 | AC | 109 ms
53,716 KB |
testcase_18 | AC | 113 ms
53,908 KB |
testcase_19 | AC | 117 ms
53,660 KB |
testcase_20 | AC | 67 ms
50,416 KB |
ソースコード
import java.io.InputStream; import java.io.InputStreamReader; import java.io.IOException; import java.io.PrintWriter; import java.util.ArrayDeque; import java.util.ArrayList; import java.util.Arrays; import java.util.Comparator; import java.util.Deque; import java.util.HashMap; import java.util.InputMismatchException; import java.util.Map; import java.util.PriorityQueue; import java.math.BigInteger; public class Main{ static final InputStream in=System.in; static final PrintWriter out=new PrintWriter(System.out); static final int INF=Integer.MAX_VALUE/2; static final long LINF=Long.MAX_VALUE/2; static int N,V,MAX_N=200,ox,oy; static MyArrayList[] list=new MyArrayList[MAX_N*MAX_N]; static int[][] map=new int[MAX_N][MAX_N]; static int[] dist=new int[MAX_N*MAX_N]; static final int[] dx={-1,0,1,0}; static final int[] dy={0,-1,0,1}; public static void main(String[] args) throws IOException{ InputReader ir=new InputReader(in); N=ir.nextInt(); V=ir.nextInt(); oy=ir.nextInt()-1; ox=ir.nextInt()-1; for(int i=0;i<N;i++) map[i]=ir.toIntArray(N); for(int i=0;i<N*N;i++){ list[i]=new MyArrayList(); int x=i/N; int y=i%N; for(int j=0;j<4;j++){ int nx=x+dx[j]; int ny=y+dy[j]; if(nx>=0&&nx<N&&ny>=0&&ny<N) list[i].add(new Edge(nx*N+ny,map[nx][ny])); } } dijkstra(0); if(dist[N*N-1]<V) out.println("YES"); else if(ox==-1&&oy==-1) out.println("NO"); else if(dist[ox*N+oy]>=V) out.println("NO"); else{ V-=dist[ox*N+oy]; V*=2; dijkstra(ox*N+oy); out.println((dist[N*N-1]<V)?"YES":"NO"); } out.flush(); } static class Edge{ int to; int cost; public Edge(int to,int cost){ this.to=to; this.cost=cost; } } static class Pair{ int x; int y; public Pair(int x,int y){ this.x=x; this.y=y; } public static Comparator<Pair> DISTANCE_ORDER=new Comp(); private static class Comp implements Comparator<Pair>{ public int compare(Pair p1,Pair p2){ return (p1.x>p2.x)?1:(p1.x<p2.x)?-1:0; } } } static class MyArrayList extends ArrayList<Edge>{} public static void dijkstra(int s){ PriorityQueue<Pair> pque=new PriorityQueue<Pair>(19,Pair.DISTANCE_ORDER); Arrays.fill(dist,INF); dist[s]=0; pque.offer(new Pair(0,s)); while(!pque.isEmpty()){ Pair p=pque.poll(); int v=p.y; MyArrayList array=list[v]; if(dist[v]<p.x||array.size()==0) continue; for(int i=0;i<array.size();i++){ Edge e=array.get(i); if(dist[e.to]>dist[v]+e.cost){ dist[e.to]=dist[v]+e.cost; pque.offer(new Pair(dist[e.to],e.to)); } } } } static class InputReader { private InputStream in; private byte[] buffer=new byte[1024]; private int curbuf; private int lenbuf; public InputReader(InputStream in) {this.in=in;} public int readByte() { if(lenbuf==-1) throw new InputMismatchException(); if(curbuf>=lenbuf){ curbuf= 0; try{ lenbuf=in.read(buffer); } catch (IOException e) { throw new InputMismatchException(); } if(lenbuf<=0) return -1; } return buffer[curbuf++]; } public boolean isSpaceChar(int c){return !(c>=33&&c<=126);} private int skip() {int b; while((b = readByte())!=-1&&isSpaceChar(b)); return b;} public String next() { int b=skip(); StringBuilder sb=new StringBuilder(); while(!isSpaceChar(b)){ sb.appendCodePoint(b); b=readByte(); } return sb.toString(); } public int nextInt() { int c=readByte(); while (isSpaceChar(c)) c=readByte(); boolean minus=false; if (c=='-') { minus=true; c=readByte(); } int res=0; do{ if(c<'0'||c>'9') throw new InputMismatchException(); res=res*10+c-'0'; c=readByte(); }while(!isSpaceChar(c)); return (minus)?-res:res; } public long nextLong() { int c=readByte(); while (isSpaceChar(c)) c=readByte(); boolean minus=false; if (c=='-') { minus=true; c=readByte(); } long res = 0; do{ if(c<'0'||c>'9') throw new InputMismatchException(); res=res*10+c-'0'; c=readByte(); }while(!isSpaceChar(c)); return (minus)?-res:res; } public int[] toIntArray(int n){ int[] a=new int[n]; for(int i=0;i<n;i++) a[i]=nextInt(); return a; } } }