给定12小时AM/PM格式的时间，将其转换为军用（24 小时）时间。
function timeConversion(s) {
// Write your code here
let [hours, minutes, seconds] = s.split(":");
const period = seconds.slice(-2); //AM or PM
seconds = seconds.slice(0, 2);
hours = parseInt(hours);
if (period === "AM") {
if (hours === 12) {
hours = 0;
}
} else {
if (hours !== 12) {
hours += 12;
}
}
const militratHours = String(hours).padStart(2, "0");
return `${militratHours}:${minutes}:${seconds}`;
}