add abc408d.rs

Author: rchaser53

src/abc/abc408d.rs

@@ -0,0 +1,44 @@
+/** THIS IS AN OUTPUT FILE. NOT EDIT THIS FILE DIRECTLY. **/
+use proconio::input;
+use proconio::marker::*;
+use std::marker::PhantomData;
+use std::cmp::*;
+use std::collections::*;
+
+fn main() {
+  input! {
+    t:usize,
+  }
+
+  for _ in 0..t {
+    input! {
+      n:usize,
+      s:String,
+    }
+
+    let mut a = vec![0i64;n+1];
+    let mut b = vec![0i64;n+1];
+    let mut c = vec![0i64;n+1];
+    
+    for i in 0..n {
+      let one = &s[i..i+1] == "1";
+      a[i+1] = a[i];
+      b[i+1] = b[i];
+      if one {
+        b[i+1] += 1;
+      } else {
+        a[i+1] += 1;
+      }
+      c[i+1] = a[i+1] - b[i+1];
+    } 
+    
+    let mut result = 1i64 << 60;
+    let mut temp = -1i64 << 60;
+    for i in 0..n+1 {
+      temp = std::cmp::max(temp, c[i]);
+      result = std::cmp::min(result, c[i]-temp);
+    }
+
+    println!("{}", result+b[n]);
+  }
+}