03: Solve in C

03/solution.c

@@ -0,0 +1,32 @@
+#include <stdio.h>
+#include <string.h>
+
+#define P(c) (c < 97 ? c - 38 : c - 96)
+
+int main(void) {
+    char l[128];
+    int e = 0, i, n, S = 0, G = 0, g[53] = {0};
+
+    while (fgets(l, 128, stdin)) {
+        n = strlen(l) - 1;
+
+        int s[53] = {0};
+        for (i = 0; i < n / 2; i++) s[P(l[i])] = 1;
+        for (i = n / 2; i < n; i++) s[P(l[i])] *= 2;
+        for (i = 1; i < 53; i++) if (s[i] > 1) S += i;
+
+        if (!(e % 3))
+            for (i = 0; i < n; i++) g[P(l[i])] = 1;
+        else {
+            for (i = 0; i < n; i++) g[P(l[i])] *= 2;
+            for (i = 1; i < 53; i++) g[i] = g[i] > 1;
+        }
+
+        if (!(++e % 3)) {
+            for (i = 1; i < 53; i++) if (g[i]) G += i;
+            memset(g, 0, 53 * sizeof(int));
+        }
+    }
+
+    printf("Silver: %d\nGold: %d\n", S, G);
+}