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#!/usr/bin/bc
define digit_sum (n) {
scale = 0
sum = 0
while (n > 0) {
sum += (n % 10)
n = n / 10
}
scale = 20
return sum
}
max = 0
for (i = 1; i <= 100; i++) {
for (j = 1; j <= 100; j++) {
s = digit_sum(i^j)
if (s > max) {
max = s
}
}
}
max
halt
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