/in/Main.java:5: error: class PerfectMatching is public, should be declared in a file named PerfectMatching.java
public class PerfectMatching {
       ^
/in/Main.java:50: error: cannot find symbol
            Arrays.fill(visited, false);
            ^
  symbol:   variable Arrays
  location: class PerfectMatching
/in/Main.java:78: error: cannot find symbol
            Arrays.fill(visited, false);
            ^
  symbol:   variable Arrays
  location: class PerfectMatching
3 errors