diff --git a/2015/d1/main.zig b/2015/d1/main.zig
new file mode 100644
index 0000000..b86253d
--- /dev/null
+++ b/2015/d1/main.zig
@@ -0,0 +1,33 @@
+const std = @import("std");
+
+const input = @embedFile("input");
+
+fn floorTester(in: []const u8) i32{
+    var floor: i32 = 0;
+    for (in) |c|{
+        switch (c){
+            '(' => floor += 1,
+            ')' => floor -= 1,
+            else => unreachable,
+        }
+    }
+    return floor;
+}
+
+fn whenBasement(in: []const u8) ?usize{
+    var floor: i32 = 0;
+    for (in, 0..) |c, i|{
+        switch (c){
+            '(' => floor += 1,
+            ')' => floor -= 1,
+            else => unreachable,
+        }
+        if (floor < 0) return i+1;
+    }
+    return null;
+}
+
+pub fn main() void{
+    std.debug.print("Is on floor {d}\n", .{floorTester(input)});
+    std.debug.print("Is in basement at {?}\n", .{whenBasement(input)});
+}