2022/day03/main.c


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#include <stdio.h>
#include <stdlib.h>
#include <string.h>

char getWrong(char *line)
{
    char *middle = line + strlen(line)/2;
    char *a = line;
    char *b = middle;
    for (char *a = line; a < middle; a++)
    {
        for (char *b = middle; *b != '\n'; b++)
        {
            if ( *a == *b ) return *b;
        }
    }
}

int main()
{
    char *line = NULL;
    size_t len;
    int prios = 0;
    
    while (getline(&line, &len, stdin) >= 0)
    {
        char wrong = getWrong(line);
        printf("%c", wrong);
        int prio;
        if ( wrong >= 97 && wrong <= 122 ) prio = wrong - 96;
        else prio = wrong - 64 + 26;
        printf("%d", prio);
        prios += prio;
    }
    printf("\n%d\n", prios);
}