function solution(D) { const daysOfWeek = ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"]; const output = {};
// Iterate over each key-value pair in the input dictionary for (const dateStr in D) { const value = D[dateStr]; const date = new Date(dateStr); const dayOfWeek = daysOfWeek[date.getDay()];
// Add the value to the corresponding day of the week
output[dayOfWeek] = (output[dayOfWeek] || 0) + value;
// Check if there are any missing days of the week
const prevDate = new Date(date.getTime() - 24 * 60 * 60 * 1000);
const nextDate = new Date(date.getTime() + 24 * 60 * 60 * 1000);
const prevDayOfWeek = daysOfWeek[prevDate.getDay()];
const nextDayOfWeek = daysOfWeek[nextDate.getDay()];
if (!(prevDayOfWeek in output)) {
output[prevDayOfWeek] = Math.round((value + (output[nextDayOfWeek] || 0)) / 2);
}
if (!(nextDayOfWeek in output)) {
output[nextDayOfWeek] = Math.round((value + (output[prevDayOfWeek] || 0)) / 2);
}
}
return output; }
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