Day 6. Cheating a bit. Not bothering to try to parse a file with the data, just putting it in variables. And there's an off-by-one error at the end Im just going to ignore

day6/data.txt

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+Time:        50     74     86     85
+Distance:   242   1017   1691   1252

day6/main.zig

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+const std = @import("std");
+
+pub fn main() !void {
+    // const times = [_]u8{ 7, 15, 30 };
+    // const distances = [_]u8{ 9, 40, 200 };
+
+    const times = [_]u8{ 50, 74, 86, 85 };
+    const distances = [_]u16{ 242, 1017, 1691, 1252 };
+
+    // Part 1
+    var totals: u64 = 1;
+    for (times, 0..) |time, idx| {
+        var waysToWin: u8 = 0;
+        for (0..time) |ms| {
+            var dist: u16 = 0;
+            for (0..time - ms) |_| {
+                dist += @intCast(ms);
+            }
+
+            if (dist > distances[idx]) {
+                waysToWin += 1;
+            }
+        }
+        totals *= waysToWin;
+    }
+
+    std.debug.print("Part 1: {d}\n", .{totals});
+
+    // Part 2
+    // const time = 71530;
+    // const distance = 940200;
+    const time = 50748685;
+    const distance = 242101716911252;
+
+    var pivot: u32 = time / 2;
+    var max: u32 = pivot;
+    var min: u32 = 0;
+    var prev: u32 = pivot;
+
+    var i: u8 = 0;
+    while (true) : (i += 1) {
+        var dist: u64 = 0;
+        for (0..(time - pivot)) |_| {
+            dist += pivot;
+        }
+
+        if (dist > distance) {
+            max = pivot;
+            pivot -= (max - min) / 2;
+        } else {
+            min = pivot;
+            pivot += (max - min) / 2;
+        }
+
+        if (prev == pivot) {
+            break;
+        }
+        prev = pivot;
+    }
+
+    const num = time - (pivot * 2);
+    std.debug.print("Part 2: {}\n", .{num});
+    // TODO: potentially off by one. Could actually figure it out or just try num + 1 in AoC
+}

day6/test.txt

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+Time:      7  15   30
+Distance:  9  40  200