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clean day09
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xeals 2023-12-09 20:46:40 +11:00
parent 9b8ae4f350
commit b5583ca46e
Signed by: xeals
SSH Key Fingerprint: SHA256:53xHRPqZPQewIgPNiVQ96gm8O4xBVzaxNj1LCSJpTf4
1 changed files with 3 additions and 7 deletions
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10
src/day09.zig
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@ -46,14 +46,10 @@ fn solve(alloc: mem.Allocator, input: []const u8) !Solution {
// Extrapolate
var next: isize = 0;
var prev: isize = 0;
for (seqs.items) |seq| {
next += seq[seq.len - 1];
}
for (0..seqs.items.len) |i| {
prev = seqs.items[seqs.items.len - i - 1][0] - prev;
}
for (seqs.items) |seq| {
// Clean up
const seq = seqs.items[seqs.items.len - i - 1];
prev = seq[0] - prev;
next += seq[seq.len - 1];
alloc.free(seq);
}
prev_sum += prev;