add third day

03.c

@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h> 
+
+int get_prio (char c) {
+	int r = (int) (c - 'a'+1);
+	if (r > 0) return r;
+	return r + 'A' - 7;
+}
+
+int main () {
+	char cur[50];
+	int half = 0;
+	u_int64_t mask = 0;
+	int sum = 0;
+
+	while (fgets(cur,50,stdin) != NULL) {
+		int i;
+		half = strlen(cur) / 2;
+		for (i = 0; i<half; i++) {
+			//printf("%c %d\n", cur[i], get_prio(cur[i]));
+			mask |= (1LL << get_prio(cur[i]));
+		}
+		//printf("half!\n");
+		for (i=half; i<strlen(cur)-1; i++) {
+			//printf("%c %d\n", cur[i], get_prio(cur[i]));
+			if (mask & (1LL << get_prio(cur[i]))) {
+				// printf("%c", cur[i]);
+				sum += get_prio(cur[i]);
+				break;
+			}
+		}
+		mask = 0;
+	}
+	printf("%d\n", sum);
+
+}

03_02.c

@@ -0,0 +1,38 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h> 
+
+int get_prio (char c) {
+	int r = (int) (c - 'a'+1);
+	if (r > 0) return r;
+	return r + 'A' - 7;
+}
+
+int main () {
+	char cur[50];
+	int half = 0;
+	u_int64_t masks[3] = {0};
+	int sum = 0;
+	int j =0;
+	while (fgets(cur,50,stdin) != NULL) {
+		int i;
+		for (i=0; i<strlen(cur)-1; i++) {
+			masks[j] |= (1LL << get_prio(cur[i]));
+		}
+		if (j == 2) {
+			u_int64_t mask = 0;
+			mask = masks[0] & masks[1] & masks[2];
+			for (int k=0; k<3; k++) masks[k] = 0;
+			int k =-1;
+			while (mask > 0) {
+				k++;
+				mask >>=1LL;
+			}
+			sum += k;
+			j = -1;
+		}
+		j++;
+	}
+	printf("%d\n", sum);
+
+}