제출 #658793

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
658793		coderInTraining	Palembang Bridges (APIO15_bridge)	Java	0 / 100	107 ms	10120 KiB

bridge

import java.util.*;

class bridge {
    public static void main (String[]args) {
        Scanner scan = new Scanner (System.in);

        int allowedBridges = scan.nextInt();
        int citizenNumber = scan.nextInt();

        long previousAdding = 0;

        ArrayList<Integer> locations = new ArrayList<Integer>();

        for (int i = 0; i < citizenNumber; i++) {

            String line = scan.next();

            char startZone = line.charAt(0);
            int index = 0;

            for (int j = 1; j < line.length(); j++) {

                if (line.charAt(j) == 'A' || line.charAt(j) == 'B') {
                    index = j;
                    break;
                }
            }

            int startLocation = Integer.valueOf(line.substring(1, index));
            char endZone = line.charAt(index);
            int endLocation = Integer.valueOf(line.substring(index + 1));

            if (startZone == endZone) {
                previousAdding += Math.abs(endLocation - startLocation);
                continue;
            }

            locations.add(startLocation);
            locations.add(endLocation);
        }

        /*
         * If we are only able to build one bridge, we should
         * build it at the median of all start and end locations.
         * After find the median, we can calculate the answer
         * by looping through all values and adding the previously
         * calculated value for locations in the same zone. 
         */
        if (allowedBridges == 1) {

            long answer = 0;

            if (locations.size() != 0) {
                Collections.sort(locations);

                int size = locations.size();
                int median = locations.get(size / 2 - 1);
                for (int i = 0; i < locations.size(); i++) {
                    answer += Math.abs(locations.get(i) - median);
                }

                answer += (locations.size() / 2);
            }

            answer += previousAdding;

            System.out.println(answer);
        }
        else {
            System.out.println(100);
        }
    }
}

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