042 ok

042/main.rs

@@ -0,0 +1,37 @@
+use std::fs::read_to_string;
+use std::collections::HashSet;
+
+fn sn(s: &str) -> u32 {
+    let st = String::from(s);
+    let mut res = 0;
+    for c in st.chars() {
+        if c == '"' {
+            continue;
+        }
+        let d = c as u32 - 64;
+        res += d;
+        //println!("{}", d);
+    }
+    return res;
+}
+
+fn main() {
+    let mut hs = HashSet::new();
+    for n in 1..200 {
+        let tn = (n * (n + 1)) / 2;
+        hs.insert(tn);
+    }
+    let mut count = 0;
+    for line in read_to_string("0042_words.txt").unwrap().lines() {
+        let sp = line.split(',');
+        for s in sp {
+            let n = sn(&s);
+            //println!("{} {}", s, n);
+            if hs.contains(&n) {
+                count += 1;
+            }
+        }
+    }
+    //let r = sn("SKY");
+    println!("{}", count);
+}