organised 2024 year and added day4 in rust solution

2024/1/day1/Cargo.lock

@@ -0,0 +1,16 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "day1"
+version = "0.1.0"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.167"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09d6582e104315a817dff97f75133544b2e094ee22447d2acf4a74e189ba06fc"

2024/1/day1/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day1"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+libc = "0.2.167"

2024/1/day1/src/main.rs

@@ -0,0 +1,47 @@
+use std::io::{stdin, Read};
+use libc::{clock_gettime, timespec, CLOCK_PROCESS_CPUTIME_ID};
+
+fn main() {
+    let mut data = String::new();
+    stdin().read_to_string(&mut data).unwrap();
+
+    let mut begin = timespec {
+        tv_sec: 0,
+        tv_nsec: 0,
+    };
+    unsafe {
+        clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &mut begin);
+    };
+
+    let mut num1 = vec![];
+    let mut num2 = vec![];
+
+    for line in data.lines() {
+        let numbers: Vec<&str> = line.split("   ").collect();
+        let num11: i32 = numbers[0].parse().unwrap();
+        let num22: i32 = numbers[1].parse().unwrap();
+        num1.push(num11);
+        num2.push(num22);
+    }
+    num1.sort_unstable();
+    num2.sort_unstable();
+
+    let mut sum = 0;
+    for i in 0..num1.len() {
+        let num_sum = num1[i].abs_diff(num2[i]);
+        sum += num_sum;
+    }
+
+    let mut end = timespec {
+        tv_sec: 0,
+        tv_nsec: 0,
+    };
+    unsafe {
+        clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &mut end);
+    };
+    println!("{sum:?}");
+    println!(
+        "time: {:.6}ms",
+        (end.tv_nsec - begin.tv_nsec) as f32 / 1000.0 / 1000.0
+    );
+}

2024/1/day1bothparts/both.cpp

@@ -0,0 +1,46 @@
+#include <iostream>
+#include <fstream>
+#include <vector>
+#include <algorithm>
+#include <cmath>
+#include <chrono>
+
+int main() {
+
+    std::vector<int> x;
+    std::vector<int> y;
+    int l, r;
+    long t = 0;
+    long t2 = 0;
+    int c = 0;
+
+    std::chrono::steady_clock::time_point begin = std::chrono::steady_clock::now();
+    std::ifstream f("b");
+    while (f >> l >> r) {
+        x.push_back(l);
+        y.push_back(r);
+    }
+
+    std::sort(x.begin(), x.end());
+    std::sort(y.begin(), y.end());
+    
+    for (size_t i = 0; i < 4000000; i++) {
+        t += std::abs(x[i] - y[i]);
+    }
+
+    auto p = y.begin();
+    for (size_t i = 0; i < 4000000; i++) {
+	   auto b = std::lower_bound(p, y.end(), x[i]);
+	   auto u = std::upper_bound(p, y.end(), x[i]);
+	   int c = u - b;
+	   t2 += x[i] * c;
+	   p = b;
+    }
+
+    std::chrono::steady_clock::time_point end = std::chrono::steady_clock::now();
+
+    std::cout << "Part 1: " << t << "\nPart 2: " << t2 << "\n";
+    std::cout << "Time difference = " << std::chrono::duration_cast<std::chrono::microseconds>(end - begin).count() << " microseconds" << std::endl;
+
+    return 0;
+}

2024/1/day1bothparts/mult.sh

@@ -0,0 +1,8 @@
+g++ sorter.cpp -o run
+time ./run
+time ./run | grep real
+time ./run | grep real
+time ./run | grep real
+time ./run | grep real
+time ./run | grep real
+time ./run

2024/1/day1bothparts/part1.cpp

@@ -0,0 +1,30 @@
+#include <iostream>
+#include <fstream>
+#include <vector>
+#include <algorithm>
+#include <cmath>
+
+int main() {
+    std::ifstream f("b");
+
+    std::vector<int> x;
+    std::vector<int> y;
+    int l, r;
+    
+    while (f >> l >> r) {
+        x.push_back(l);
+        y.push_back(r);
+    }
+
+    std::sort(x.begin(), x.end());
+    std::sort(y.begin(), y.end());
+    
+    long t = 0;
+    for (size_t i = 0; i < 4000000; i++) {
+        t += std::abs(x[i] - y[i]);
+    }
+
+    std::cout << t;
+
+    return 0;
+}

2024/1/day1bothparts/part2.cpp

@@ -0,0 +1,36 @@
+#include <iostream>
+#include <fstream>
+#include <vector>
+#include <algorithm>
+#include <cmath>
+
+int main() {
+    std::ifstream f("b");
+
+    std::vector<int> x;
+    std::vector<int> y;
+    int l, r;
+    
+    while (f >> l >> r) {
+        x.push_back(l);
+        y.push_back(r);
+    }
+
+    std::sort(x.begin(), x.end());
+    std::sort(y.begin(), y.end());
+ 
+    long t = 0;
+    int c = 0;
+    auto p = y.begin();
+    for (size_t i = 0; i < 4000000; i++) {
+	    auto b = std::lower_bound(p, y.end(), x[i]);
+	    auto u = std::upper_bound(p, y.end(), x[i]);
+	    int c = u - b;
+	    t += x[i] * c;
+	    p = b;
+    }
+
+    std::cout << t;
+
+    return 0;
+}

2024/1/day1bothparts/s

@@ -0,0 +1,6 @@
+3   4
+4   3
+2   5
+1   3
+3   9
+3   3

2024/1/day1p2/Cargo.lock

@@ -0,0 +1,16 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "day1p2"
+version = "0.1.0"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "libc"
+version = "0.2.167"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09d6582e104315a817dff97f75133544b2e094ee22447d2acf4a74e189ba06fc"

2024/1/day1p2/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "day1p2"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+libc = "0.2.167"

2024/1/day1p2/src/main.rs

@@ -0,0 +1,50 @@
+use std::io::{stdin, Read};
+use libc::{clock_gettime, timespec, CLOCK_PROCESS_CPUTIME_ID};
+
+fn main() {
+    let mut data = String::new();
+    stdin().read_to_string(&mut data).unwrap();
+
+    let mut begin = timespec {
+        tv_sec: 0,
+        tv_nsec: 0,
+    };
+    unsafe {
+        clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &mut begin);
+    };
+
+    let mut num1 = vec![];
+    let mut num2 = vec![];
+
+    for line in data.lines() {
+        let numbers: Vec<&str> = line.split("   ").collect();
+        let num11: i32 = numbers[0].parse().unwrap();
+        let num22: i32 = numbers[1].parse().unwrap();
+        num1.push(num11);
+        num2.push(num22);
+    }
+
+    let mut sum = 0;
+
+    for i in num1 {
+        let mut count = 0;
+        for num in &num2 {
+            if i == *num {
+                count += 1;
+            }
+        }
+        sum += i * count;
+    }
+    println!("{sum:?}");
+    let mut end = timespec {
+        tv_sec: 0,
+        tv_nsec: 0,
+    };
+    unsafe {
+        clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &mut end);
+    };
+    println!(
+        "time: {:.6}ms",
+        (end.tv_nsec - begin.tv_nsec) as f32 / 1000.0 / 1000.0
+    );
+}