diff --git a/atcoder/abc365/a.rs b/atcoder/abc365/a.rs
new file mode 100644
index 00000000..1ff44e23
--- /dev/null
+++ b/atcoder/abc365/a.rs
@@ -0,0 +1,10 @@
+fn getline() -> String {
+    let mut ret = String::new();
+    std::io::stdin().read_line(&mut ret).ok().unwrap();
+    ret
+}
+
+fn main() {
+    let y = getline().trim().parse::<i64>().unwrap();
+    println!("{}", 365 + ((y % 400 == 0) ^ (y % 100 == 0) ^ (y % 4 == 0)) as i32);
+}
diff --git a/atcoder/abc365/b.rs b/atcoder/abc365/b.rs
new file mode 100644
index 00000000..7a26723a
--- /dev/null
+++ b/atcoder/abc365/b.rs
@@ -0,0 +1,40 @@
+use std::io::Read;
+
+fn get_word() -> String {
+    let stdin = std::io::stdin();
+    let mut stdin=stdin.lock();
+    let mut u8b: [u8; 1] = [0];
+    loop {
+        let mut buf: Vec<u8> = Vec::with_capacity(16);
+        loop {
+            let res = stdin.read(&mut u8b);
+            if res.unwrap_or(0) == 0 || u8b[0] <= b' ' {
+                break;
+            } else {
+                buf.push(u8b[0]);
+            }
+        }
+        if buf.len() >= 1 {
+            let ret = String::from_utf8(buf).unwrap();
+            return ret;
+        }
+    }
+}
+
+fn get<T: std::str::FromStr>() -> T { get_word().parse().ok().unwrap() }
+
+fn main() {
+    let n: usize = get();
+    let mut a: Vec<i64> = vec![0; n];
+    for i in 0..n {
+        a[i] = get();
+    }
+    let mut b = a.clone();
+    b.sort();
+    for i in 0..n {
+        if a[i] == b[n - 2] {
+            println!("{}", i + 1);
+            return;
+        }
+    }
+}
diff --git a/atcoder/abc365/c.rs b/atcoder/abc365/c.rs
new file mode 100644
index 00000000..46705a45
--- /dev/null
+++ b/atcoder/abc365/c.rs
@@ -0,0 +1,53 @@
+use std::io::Read;
+
+fn get_word() -> String {
+    let stdin = std::io::stdin();
+    let mut stdin=stdin.lock();
+    let mut u8b: [u8; 1] = [0];
+    loop {
+        let mut buf: Vec<u8> = Vec::with_capacity(16);
+        loop {
+            let res = stdin.read(&mut u8b);
+            if res.unwrap_or(0) == 0 || u8b[0] <= b' ' {
+                break;
+            } else {
+                buf.push(u8b[0]);
+            }
+        }
+        if buf.len() >= 1 {
+            let ret = String::from_utf8(buf).unwrap();
+            return ret;
+        }
+    }
+}
+
+fn get<T: std::str::FromStr>() -> T { get_word().parse().ok().unwrap() }
+
+fn main() {
+    let n: usize = get();
+    let m: i64 = get();
+    let mut a: Vec<i64> = vec![0; n];
+    for i in 0..n {
+        a[i] = get();
+    }
+    let asum = a.iter().sum::<i64>();
+    if asum <= m {
+        println!("infinite");
+        return;
+    }
+    let mut pass = 0;
+    let mut fail = 1 << 30;
+    while fail - pass > 1 {
+        let mid = (pass + fail) / 2;
+        let mut sum = 0;
+        for i in 0..n {
+            sum += a[i].min(mid);
+        }
+        if sum <= m {
+            pass = mid;
+        } else {
+            fail = mid;
+        }
+    }
+    println!("{pass}");
+}
diff --git a/atcoder/abc365/remain.txt b/atcoder/abc365/remain.txt
new file mode 100644
index 00000000..9fcb84e1
--- /dev/null
+++ b/atcoder/abc365/remain.txt
@@ -0,0 +1,4 @@
+d
+e
+f
+g