day2.java

public class Main {

    public static void main(String[] args) {
        String input = "116\t1259\t1045\t679\t1334\t157\t277\t1217\t218\t641\t1089\t136\t247\t1195\t239\t834\n" +
                "269\t1751\t732\t3016\t260\t6440\t5773\t4677\t306\t230\t6928\t7182\t231\t2942\t2738\t3617\n" +
                "644\t128\t89\t361\t530\t97\t35\t604\t535\t297\t599\t121\t567\t106\t114\t480\n" +
                "105\t408\t120\t363\t430\t102\t137\t283\t123\t258\t19\t101\t181\t477\t463\t279\n" +
                "873\t116\t840\t105\t285\t238\t540\t22\t117\t125\t699\t953\t920\t106\t113\t259\n" +
                "3695\t161\t186\t2188\t3611\t2802\t157\t2154\t3394\t145\t2725\t1327\t3741\t2493\t3607\t4041\n" +
                "140\t1401\t110\t119\t112\t1586\t125\t937\t1469\t1015\t879\t1798\t122\t1151\t100\t926\n" +
                "2401\t191\t219\t607\t267\t2362\t932\t2283\t889\t2567\t2171\t2409\t1078\t2247\t2441\t245\n" +
                "928\t1142\t957\t1155\t922\t1039\t452\t285\t467\t305\t506\t221\t281\t59\t667\t232\n" +
                "3882\t1698\t170\t5796\t2557\t173\t1228\t4630\t174\t3508\t5629\t4395\t180\t5100\t2814\t2247\n" +
                "396\t311\t223\t227\t340\t313\t355\t469\t229\t162\t107\t76\t363\t132\t453\t161\n" +
                "627\t1331\t1143\t1572\t966\t388\t198\t2068\t201\t239\t176\t1805\t1506\t1890\t1980\t1887\n" +
                "3390\t5336\t1730\t4072\t5342\t216\t3823\t85\t5408\t5774\t247\t5308\t232\t256\t5214\t787\n" +
                "176\t1694\t1787\t1586\t3798\t4243\t157\t4224\t3603\t2121\t3733\t851\t2493\t4136\t148\t153\n" +
                "2432\t4030\t3397\t4032\t3952\t2727\t157\t3284\t3450\t3229\t4169\t3471\t4255\t155\t127\t186\n" +
                "919\t615\t335\t816\t138\t97\t881\t790\t855\t89\t451\t789\t423\t108\t95\t116";

        System.out.println("Checksum: " + checksum(input));
        System.out.println("Checksum2: " + checksum2(input));
    }


    public static int checksum(String input) {
        int result = 0;

        String[] lines_string = input.split("\n");
        String[][] numbers_string = new String[lines_string.length][];

        for(int i = 0; i < lines_string.length; i++){
            numbers_string[i] = lines_string[i].split("\t");
        }

        int[][] numbers_int = new int[lines_string.length][];
        for(int i = 0; i < numbers_int.length; i++){
            numbers_int[i] = new int[numbers_string[i].length];
            for(int j = 0; j < numbers_int[i].length; j++){
                numbers_int[i][j] = Integer.valueOf(numbers_string[i][j]);
            }
        }

        for(int i = 0; i < numbers_int.length; i++)
            result = result + (ReturnMax(numbers_int[i]) - ReturnMin(numbers_int[i]));

        return result;
    }

    public static int checksum2(String input) {
        int result = 0;

        String[] lines_string = input.split("\n");
        String[][] numbers_string = new String[lines_string.length][];

        for(int i = 0; i < lines_string.length; i++){
            numbers_string[i] = lines_string[i].split("\t");
        }

        int[][] numbers_int = new int[lines_string.length][];
        for(int i = 0; i < numbers_int.length; i++){
            numbers_int[i] = new int[numbers_string[i].length];
            for(int j = 0; j < numbers_int[i].length; j++){
                numbers_int[i][j] = Integer.valueOf(numbers_string[i][j]);
            }
        }

        for(int i = 0; i < numbers_int.length; i++){
            for(int j = 0; j < numbers_int[i].length; j++){
                for(int k = 1; k < numbers_int[i].length; k++){
                    if(numbers_int[i][j] % numbers_int[i][(j + k) % numbers_int[i].length] == 0)
                        result = result + (numbers_int[i][j] / numbers_int[i][(j + k) % numbers_int[i].length]);
                }
            }
        }

        return result;
    }



    public static int ReturnMax(int[] input){
        int Max = input[0];
        for(int i = 0; i < input.length; i++){
            if(input[i] > Max)
                Max = input[i];
        }
        return Max;
    }

    public static int ReturnMin(int[] input){
        int Min = input[0];
        for(int i = 0; i < input.length; i++) {
            if (input[i] < Min)
                Min = input[i];
        }
        return Min;
    }
}