public class Solution {
public IList<bool> KidsWithCandies(int[] candies, int extraCandies) {
var max = candies[0];
foreach (var candy in candies.AsSpan(1))
if (candy > max) max = candy;
var ret = new bool[candies.Length];
for(var i = 0; i < candies.Length; i++)
ret[i] = candies[i] + extraCandies >= max;
return ret;
}
}