1 files changed, 43 insertions, 0 deletions
diff --git a/2017/9.c b/2017/9.c
new file mode 100644
index 0000000..3e30c16
--- /dev/null
+++ b/2017/9.c
@@ -0,0 +1,43 @@
+#include <stdio.h>
+#include <stdbool.h>
+
+
+int main(void){
+	freopen("9.in","r",stdin);
+
+	int c;
+	int depth=0,score=0,removed=0;
+	bool garbage=false;
+	while((c=getchar())!=EOF){
+		if(garbage){
+			switch(c){
+				case '!':
+					if(garbage)getchar();
+					break;
+				case '>':
+					garbage=false;
+					break;
+				default:
+					if(garbage)removed++;
+			}
+		} else {
+			switch(c){
+				case '{':
+					if(!garbage){
+						depth++;
+						score+=depth;
+					}
+					break;
+				case '}':
+					if(!garbage)depth--;
+					break;
+				case '<':
+					garbage=true;
+					break;
+			}
+		}
+	}
+
+	printf("%d\n",score);
+	printf("%d\n",removed);
+}