Day 2: Cube Conundrum


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  • sjmulder@lemmy.sdf.org
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    11 months ago

    String parsing! Always fun in C!

    https://github.com/sjmulder/aoc/blob/master/2023/c/day02.c

    int main(int argc, char **argv)
    {
    	char ln[256], *sr,*srd,*s;
    	int p1=0,p2=0, id, r,g,b;
    
    	for (id=1; (sr = fgets(ln, sizeof(ln), stdin)); id++) {
    		strsep(&sr, ":");
    		r = g = b = 0;
    
    		while ((srd = strsep(&sr, ";")))
    		while ((s = strsep(&srd, ",")))
    			if (strchr(s, 'd')) r = MAX(r, atoi(s)); else
    			if (strchr(s, 'g')) g = MAX(g, atoi(s)); else
    			if (strchr(s, 'b')) b = MAX(b, atoi(s));
    	
    		p1 += (r <= 12 && g <= 13 && b <= 14) * id;
    		p2 += r * g * b;
    	}
    
    	printf("%d %d\n", p1, p2);
    	return 0;
    }