package util.graph;

import java.util.HashSet;
import java.util.PriorityQueue;
import java.util.Set;

public class DynDjikstra {
    public static State FindShortest(Node start, Node target) {
        PriorityQueue<Node> openSet = new PriorityQueue<>();
        Set<Node> closedSet = new HashSet<>();
        openSet.add(start);
        while (!openSet.isEmpty()) {
            Node current = openSet.poll();
            for (Edge edge : current.edges) {
                Node end = edge.target;
                if (closedSet.contains(end)) {
                    continue;
                }
                State newState = edge.travel(current.last);
                //if (end.equals(target)) {
                    //return newState;
                //}
                if (openSet.contains(end)) {
                    if (end.last.compareTo(newState)>0) {
                        end.last = newState;
                    }
                } else {
                    openSet.add(end);
                    end.last = newState;
                }
            }
            closedSet.add(current);
            if (closedSet.contains(target)) {
                return target.last;
            }
        }

        return target.last;
    }
}

package jp.funnything.competition.util;

import java.math.BigDecimal;

/**
 * Utility for BigDeciaml
 */
public class BD {
    public static BigDecimal ZERO = BigDecimal.ZERO;
    public static BigDecimal ONE = BigDecimal.ONE;

    public static BigDecimal add( final BigDecimal x , final BigDecimal y ) {
        return x.add( y );
    }

    public static BigDecimal add( final BigDecimal x , final double y ) {
        return add( x , v( y ) );
    }

    public static BigDecimal add( final double x , final BigDecimal y ) {
        return add( v( x ) , y );
    }

    public static int cmp( final BigDecimal x , final BigDecimal y ) {
        return x.compareTo( y );
    }

    public static int cmp( final BigDecimal x , final double y ) {
        return cmp( x , v( y ) );
    }

    public static int cmp( final double x , final BigDecimal y ) {
        return cmp( v( x ) , y );
    }

    public static BigDecimal div( final BigDecimal x , final BigDecimal y ) {
        return x.divide( y );
    }

    public static BigDecimal div( final BigDecimal x , final double y ) {
        return div( x , v( y ) );
    }

    public static BigDecimal div( final double x , final BigDecimal y ) {
        return div( v( x ) , y );
    }

    public static BigDecimal mul( final BigDecimal x , final BigDecimal y ) {
        return x.multiply( y );
    }

    public static BigDecimal mul( final BigDecimal x , final double y ) {
        return mul( x , v( y ) );
    }

    public static BigDecimal mul( final double x , final BigDecimal y ) {
        return mul( v( x ) , y );
    }

    public static BigDecimal sub( final BigDecimal x , final BigDecimal y ) {
        return x.subtract( y );
    }

    public static BigDecimal sub( final BigDecimal x , final double y ) {
        return sub( x , v( y ) );
    }

    public static BigDecimal sub( final double x , final BigDecimal y ) {
        return sub( v( x ) , y );
    }

    public static BigDecimal v( final double value ) {
        return BigDecimal.valueOf( value );
    }
}
