Summer Fan#

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<?xml version="1.0" encoding="utf-8" standalone="no"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" android:compileSdkVersion="32" android:compileSdkVersionCodename="12" package="com.example.summer" platformBuildVersionCode="32" platformBuildVersionName="12">
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    <application android:allowBackup="true" android:appComponentFactory="androidx.core.app.CoreComponentFactory" android:dataExtractionRules="@xml/data_extraction_rules" android:fullBackupContent="@xml/backup_rules" android:icon="@mipmap/ic_main" android:label="@string/app_name" android:roundIcon="@mipmap/ic_main_round" android:supportsRtl="true" android:theme="@style/Theme.SUMMER">
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        <activity android:exported="true" android:name="com.example.summer.MainActivity">
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            <intent-filter>
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                <action android:name="android.intent.action.MAIN"/>
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                <category android:name="android.intent.category.LAUNCHER"/>
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            </intent-filter>
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        </activity>
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        <service android:name="com.example.summer.TimerService"/>
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    </application>
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</manifest>

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private final void checkTime(Intent intent) {
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    Toast.makeText(this, (((int) intent.getDoubleExtra(TimerService.TIME_EXTRA, 0.0d)) % 86400) / 3600 >= 31337 ? generateFlag() : "플래그를 주기엔 아직 너무 더운걸...", 0).show();
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}
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private final String generateFlag() {
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    ArrayList arrayList = new ArrayList();
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    int size = MainActivityKt.getFLAG().size();
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    for (int i = 0; i < size; i++) {
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        arrayList.add(Character.valueOf((char) ((MainActivityKt.getFLAG().get(i).intValue() ^ StringsKt.first(MainActivityKt.getKEY().get(i % MainActivityKt.getKEY().size()))) - gen(i))));
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    }
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    return CollectionsKt.joinToString$default(arrayList, "", null, null, 0, null, null, 62, null);
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}

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import java.util.ArrayList;
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import java.util.List;
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import java.util.Arrays;
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public class Main {
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    private static final List<Integer> FLAG = Arrays.asList(
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            220, 211, 180, 230, 192, 22, 341, 220, 227, 341,
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            139, 163, 355, 293, 333, 196, 142, 216, 376, 133,
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            248, 26, 342, 378, 231, 149, 145, 173, 185, 1, 10, 198
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    );
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    private static final List<String> KEY = Arrays.asList(
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            "h", "o", "t", "_", "h", "o", "t", "_", "s", "u",
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            "m", "m", "m", "e", "r", "r"
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    );
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    public static void main(String[] args) {
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        Main main = new Main();
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        String flag = main.generateFlag();
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        System.out.println("FLAG: " + flag);
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    }
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    private String generateFlag() {
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        ArrayList<Character> arrayList = new ArrayList<>();
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        int size = FLAG.size();
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        int keySize = KEY.size();
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        for (int i = 0; i < size; i++) {
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            char decodedChar = (char) ((FLAG.get(i) ^ KEY.get(i % keySize).charAt(0)) - gen(i));
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            arrayList.add(decodedChar);
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        }
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        return joinToString(arrayList);
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    }
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    private int gen(int i) {
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        int size = KEY.size();
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        return (((int) Math.pow(i, 3.0)) % 256) ^ KEY.get(size - ((i % size) + 1)).charAt(0);
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    }
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    private String joinToString(List<Character> list) {
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        StringBuilder sb = new StringBuilder();
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        for (Character ch : list) {
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            sb.append(ch);
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        }
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        return sb.toString();
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    }
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}

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BISC{it_1s_so_hott_4c5515c5553a}