add stuff form last year (gave up quickly)

2023/04/main.c

@@ -0,0 +1,72 @@
+// gcc -static main.c -o main -Ofast
+
+#include <stdio.h>
+#include <unistd.h>
+#include <time.h>
+
+unsigned long long count = 0;
+
+unsigned char start_index;
+unsigned char scratches_end;
+unsigned char results_index;
+unsigned char line_size;
+
+unsigned short k = 0;
+//unsigned int sclones = 0;
+unsigned long long clones[32767] = { [0 ... 32766] = 1 };
+void addCardToCount(char *line) {
+    unsigned char matches = 0;
+    for(unsigned char i = start_index; i < scratches_end; i += 3) {
+        for(unsigned char j = results_index; j < line_size; j += 3) {
+            unsigned char match = (line[i] == line[j] && line[i + 1] == line[j + 1]);
+            matches += match;
+            if(match) break;
+        }
+    }
+
+    //unsigned long long this_instan = sclones > k ? clones[k] + 1 : 1;
+    unsigned long long this_instan = clones[k];
+    for(unsigned short i = k + 1; i < matches + k + 1; i++) {
+        //clones[i] = ((sclones > i) * clones[i]) + this_instan;
+        clones[i] += this_instan;
+    }
+    //sclones = sclones > k + matches ? sclones + 1 : k + matches;
+
+    count += this_instan;
+    k++;
+}
+
+int main() {
+    clock_t begin = clock();
+
+    unsigned char i = 0;
+    char line[256];
+
+    while(read(0, &line[i], 1) > 0 && line[i] != ':') {
+        i++;
+    }
+    start_index = ++i + 1;
+
+    while(read(0, &line[i], 1) > 0 && line[i] != '|') {
+        i++;
+    }
+    scratches_end = i - 1;
+    results_index = i++ + 2;
+
+    while(read(0, &line[i], 1) > 0 && line[i] != '\n') {
+        i++;
+    }
+    line_size = ++i;
+
+    do {
+        addCardToCount(line);
+    } while(read(0, &line, line_size) == line_size);
+
+    clock_t end = clock();
+    double time_spent = (double)(end - begin) / CLOCKS_PER_SEC;
+
+    printf("%llu\n", count);
+    printf("Time spent: %lf\n", time_spent);
+
+    return 0;
+}