79 lines
1.6 KiB
Java
79 lines
1.6 KiB
Java
import java.io.BufferedReader;
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import java.io.FileReader;
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import java.io.IOException;
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public class day03 {
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public static void main(String[] args) throws IOException {
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String gammaCalc = "";
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String epsilonCalc = "";
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int gammaVal = 0;
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int epsilonVal = 0;
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int finalAns = 0;
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String line;
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BufferedReader in = new BufferedReader(new FileReader("day03-input.txt"));
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line = in.readLine();
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int numLengthHuman = line.length();
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// [0] will not have anything i think
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int[] zeroCounter = new int[numLengthHuman + 1];
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int[] oneCounter = new int[numLengthHuman + 1];
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// temporary var, concat into an int for gammaVal/ epsilonVal.
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String[] tempC = new String[numLengthHuman + 1];
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while (line != null) {
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for (int i = 1; i <= line.length(); i++) {
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int currentNum = Integer.valueOf(line.substring(i - 1, i));
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if (currentNum == 0) {
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zeroCounter[i]++;
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}
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if (currentNum == 1) {
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oneCounter[i]++;
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}
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}
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line = in.readLine();
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}
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in.close();
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// calc gamma
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for (int i = 1; i <= numLengthHuman; i++) {
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if (zeroCounter[i] > oneCounter[i]) {
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tempC[i] = "0";
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} else {
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tempC[i] = "1";
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}
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gammaCalc = gammaCalc + tempC[i];
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}
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gammaVal = Integer.parseInt(gammaCalc, 2); // some weird conversion thing?
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// calc epsilon
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for (int i = 1; i <= numLengthHuman; i++) {
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if (zeroCounter[i] > oneCounter[i]) {
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tempC[i] = "1"; // this time, one is the least
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} else {
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tempC[i] = "0";
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}
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epsilonCalc = epsilonCalc + tempC[i];
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}
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epsilonVal = Integer.parseInt(epsilonCalc, 2);
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finalAns = gammaVal * epsilonVal;
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System.out.println(finalAns);
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}
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}
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