#!/bin/bash

__day="${1}"
if [ -z "${__day}" ]; then
    __day=$(date '+%d')
fi

padded=$(printf "%02g" ${__day})
if [ -f "src/Day${padded}.java" ]; then
    cd src
    java "Day${padded}.java" 2>/dev/null
    cd - >/dev/null
else
    echo "day not found"
fi