d10 - with python

.gitignore

@@ -1 +1,2 @@
 /target
+*/venv/

python/10.py

@@ -0,0 +1,53 @@
+import networkx as nx
+
+# load file contents from ../res/10/input
+with open("../res/10/input") as f:
+    lines = [[int(c) for c in line.strip()] for line in f]
+
+# create a directed graph
+G = nx.DiGraph()
+
+starts = []
+ends = []
+
+for i, line in enumerate(lines):
+    for j, c in enumerate(line):
+        G.add_node((i, j), pos=(i, j))
+
+# add all edges to the graph
+for i, line in enumerate(lines):
+    for j, c in enumerate(line):
+        if i > 0 and lines[i-1][j] == c+1:
+            G.add_edge((i, j), (i-1, j), weight=c)
+        if j > 0 and lines[i][j-1] == c+1:
+            G.add_edge((i, j), (i, j-1), weight=c)
+        if i < len(lines)-1 and lines[i+1][j] == c+1:
+            G.add_edge((i, j), (i+1, j), weight=c)
+        if j < len(line)-1 and lines[i][j+1] == c+1:
+            G.add_edge((i, j), (i, j+1), weight=c)
+        if c == 0:
+            starts.append((i, j))
+        if c == 9:
+            ends.append((i, j))
+
+
+
+#pos = nx.get_node_attributes(G, 'pos')
+#nx.draw(G, pos, with_labels=True, node_color='lightblue', node_size=500, font_size=16)
+#plt.show()
+
+# check if ends are reachable for starts
+result = 0
+for start in starts:
+    for end in ends:
+        if nx.has_path(G, start, end):
+            result += 1
+
+print("Result 1:",result)
+
+result = 0
+for start in starts:
+    for end in ends:
+        result += len(list(nx.all_simple_paths(G, start, end)))
+
+print("Result 2:",result)

res/10/example

@@ -0,0 +1,8 @@
+89010123
+78121874
+87430965
+96549874
+45678903
+32019012
+01329801
+10456732

res/10/input

@@ -0,0 +1,60 @@
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src/days/d10.rs

@@ -1,16 +1,9 @@
-use std::fs;
-
 pub fn solve() {
-    let path = "res/10/input";
+    println!("Running external Python program...");
 
-    #[allow(unused)]
-    let contents = fs::read_to_string(path).expect("Something went wrong reading the file");
-
-    let result: usize = 0;
-
-    println!("Result 1: {}", result);
-
-    let result: usize = 0;
-
-    println!("Result 2: {}", result);
+    std::process::Command::new("venv/bin/python")
+        .current_dir("python/")
+        .arg("10.py")
+        .status()
+        .unwrap();
 }