#define DJSTD_BASIC_ENTRY
#include "./djstdlib/core.c"

int djstd_entry(Arena *arena, StringList args) {
    string input = os_readEntireFile(arena, s("./day3-input"));

    StringList split = strSplit(arena, s("\n"), input);

    int32 maxJoltage = 0;

    for (EachEl(split, string, line)) {
        if (strEql(*line, s(""))) {
            break;
        }
        int32 firstDigit = 0;
        int32 secondDigit = 0;
        int32 secondDigStart = 0;
        for (int32 i = 0; i < line->length - 1; i++) {
            int32 currDigit = line->str[i] - '0';
            if (firstDigit < currDigit) {
                firstDigit = currDigit;
                secondDigStart = i + 1;
            }
        }
        for (int i = secondDigStart; i < line->length; i++) {
            int32 currDigit = line->str[i] - '0';
            if (secondDigit < currDigit) {
                secondDigit = currDigit;
            }
        }
        maxJoltage += firstDigit * 10 + secondDigit;
    }

    println("%d", maxJoltage);

    return 0;
}