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Thirty.java
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40 lines (30 loc) · 1.14 KB
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package HackerRank;
import java.util.*;
public class Thirty {
public static boolean canWin(int leap, int[] game) {
// Return true if you can win the game; otherwise, return false.
return canWinFrom(0, leap, game, new boolean[game.length]);
}
private static boolean canWinFrom(int i, int leap, int[] game, boolean[] visited) {
if (i >= game.length) return true;
if (i < 0 || game[i] == 1 || visited[i]) return false;
visited[i] = true;
return canWinFrom(i + leap, leap, game, visited) ||
canWinFrom(i + 1, leap, game, visited) ||
canWinFrom(i - 1, leap, game, visited);
}
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
int q = scan.nextInt();
while (q-- > 0) {
int n = scan.nextInt();
int leap = scan.nextInt();
int[] game = new int[n];
for (int i = 0; i < n; i++) {
game[i] = scan.nextInt();
}
System.out.println( (canWin(leap, game)) ? "YES" : "NO" );
}
scan.close();
}
}