diff --git a/atcoder/beginner_contests/abc042/Cargo.lock b/atcoder/beginner_contests/abc042/Cargo.lock
new file mode 100644
index 0000000..1174a44
--- /dev/null
+++ b/atcoder/beginner_contests/abc042/Cargo.lock
@@ -0,0 +1,25 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "abc042"
+version = "0.1.0"
+dependencies = [
+ "proconio",
+]
+
+[[package]]
+name = "lazy_static"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+
+[[package]]
+name = "proconio"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "91c333be3af2936f8e810300bc74fe4d0cc168ebc04ab02a28c5b1060fa1bd59"
+dependencies = [
+ "lazy_static",
+]
diff --git a/atcoder/beginner_contests/abc042/Cargo.toml b/atcoder/beginner_contests/abc042/Cargo.toml
new file mode 100644
index 0000000..00edab5
--- /dev/null
+++ b/atcoder/beginner_contests/abc042/Cargo.toml
@@ -0,0 +1,12 @@
+[package]
+name = "abc042"
+version = "0.1.0"
+edition = "2021"
+
+# dependencies added to new project
+[dependencies]
+proconio = "0.4.3"
+
+[profile.release]
+lto = true
+panic = 'abort'
diff --git a/atcoder/beginner_contests/abc042/src/bin/a.rs b/atcoder/beginner_contests/abc042/src/bin/a.rs
new file mode 100644
index 0000000..b81c519
--- /dev/null
+++ b/atcoder/beginner_contests/abc042/src/bin/a.rs
@@ -0,0 +1,11 @@
+use proconio::input;
+
+fn main() {
+    input!{
+        mut abc: [u8; 3],
+    };
+    abc.sort();
+    let ans = abc == vec![5, 5, 7];
+
+    println!("{}", if ans {"YES"} else {"NO"});
+}
diff --git a/atcoder/beginner_contests/abc042/src/bin/b.rs b/atcoder/beginner_contests/abc042/src/bin/b.rs
new file mode 100644
index 0000000..8a97063
--- /dev/null
+++ b/atcoder/beginner_contests/abc042/src/bin/b.rs
@@ -0,0 +1,14 @@
+use proconio::input;
+
+fn main() {
+    input!{
+        n: u8,
+        _l: u8,
+        mut s: [String; n],
+    };
+
+    s.sort();
+    for substring in s {
+        print!("{}", substring);
+    }
+}
diff --git a/atcoder/beginner_contests/abc042/src/bin/c.rs b/atcoder/beginner_contests/abc042/src/bin/c.rs
new file mode 100644
index 0000000..004dfe0
--- /dev/null
+++ b/atcoder/beginner_contests/abc042/src/bin/c.rs
@@ -0,0 +1,40 @@
+use proconio::input;
+
+fn check_number(n: u32, likes: &[bool; 10]) -> bool {
+    let mut result = true;
+
+    let mut m = n;
+    while m > 0 {
+        let l = m % 10;
+
+        if !likes[l as usize] {
+            result = false;
+            break;
+        }
+
+        m /= 10;
+    }
+
+    result
+}
+
+fn main() {
+    input!{
+        mut n: u32,
+        k: u32,
+        d: [u32; k],
+    };
+
+    let mut likes = [true; 10];
+    for dislike in d {
+        likes[dislike as usize] = false;
+    }
+
+    let mut check = false;
+    while !check {
+        check = check_number(n, &likes);
+        n += 1;
+    }
+
+    print!("{}", n - 1);
+}
diff --git a/atcoder/beginner_contests/abc042/src/bin/d.rs b/atcoder/beginner_contests/abc042/src/bin/d.rs
new file mode 100644
index 0000000..5de5197
--- /dev/null
+++ b/atcoder/beginner_contests/abc042/src/bin/d.rs
@@ -0,0 +1,43 @@
+use proconio::input;
+
+const MAX: u128 = u128::pow(10, 9) + 7;
+
+fn main() {
+    input!{
+        h: u128,
+        w: u128,
+        a: u128,
+        b: u128,
+    };
+
+    // Ok it seems like this way is too naive for this problem and I actually have
+    // to do some magic with combinations or something else I haven't even thought of
+
+    // But I don't think you can do combinations because you need to divide big numbers
+    // and you can't do that with modulo iirc
+
+    let mut dp = vec![vec![0; w as usize]; h as usize];
+    for i in 0..(h-a) {
+        dp[i as usize][0] = 1;
+    }
+    for j in 0..w {
+        dp[0][j as usize] = 1;
+    }
+
+    for i in 1..h {
+        for j in 1..w {
+            if !(i >= h - a && j < b) {
+                dp[i as usize][j as usize] = (dp[(i - 1) as usize][j as usize] + dp[i as usize][(j - 1) as usize]) % MAX;
+            }
+        }
+    }
+
+    // for row in &dp {
+    //     for cell in row {
+    //         print!("{} ", {cell});
+    //     }
+    //     print!("\n");
+    // }
+
+    println!("{}", {dp[(h-1) as usize][(w-1) as usize]});
+}
\ No newline at end of file