Find the missing permutation: Difference between revisions

// Alt 2 : AddSum ASCII values, mod result, cast the difference to char

auto sumsumr = reduce!q{a + b}(perms[0]); // sum row

auto ssumc = reduce!((a, b){return to!string(to!int(a) + b[i]);})("0", perms); // sum columns

write(cast(char)(sumsumr - to!int(ssumc) % sumsumr)); // see how much it falls short

// Alt 3: some sort of checksum, don't ask me: translation of Java