34 lines
1.1 KiB
Text
34 lines
1.1 KiB
Text
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#![feature(core, unicode)]
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extern crate core;
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extern crate unicode;
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use core::iter::repeat;
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use core::str::StrExt;
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use unicode::char::CharExt;
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fn rec_can_make_word(index: usize, word: &str, blocks: &[&str], used: &mut[bool]) -> bool {
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let c = word.char_at(index).to_uppercase();
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for i in range(0, blocks.len()) {
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if !used[i] && blocks[i].chars().any(|s| s == c) {
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used[i] = true;
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if index == 0 || rec_can_make_word(index - 1, word, blocks, used) {
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return true;
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}
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used[i] = false;
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}
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}
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false
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}
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fn can_make_word(word: &str, blocks: &[&str]) -> bool {
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return rec_can_make_word(word.char_len() - 1, word, blocks, repeat(false).take(blocks.len()).collect::<Vec<_>>().as_mut_slice());
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}
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fn main() {
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let blocks = [("BO"), ("XK"), ("DQ"), ("CP"), ("NA"), ("GT"), ("RE"), ("TG"), ("QD"), ("FS"), ("JW"), ("HU"), ("VI"), ("AN"), ("OB"), ("ER"), ("FS"), ("LY"), ("PC"), ("ZM")];
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let words = ["A", "BARK", "BOOK", "TREAT", "COMMON", "SQUAD", "CONFUSE"];
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for word in words.iter() {
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println!("{} -> {}", word, can_make_word(word.as_slice(), blocks.as_slice()))
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}
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}
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