AoC 2022, day 4 (C)

#include <stdio.h>

int main() {
    int     part1;
    int     part2;
    int     as, ae, bs, be;

    while (scanf( "%d-%d,%d-%d", &as, &ae, &bs, &be ) == 4) {
        part1 += ((bs - as) * (be - ae) <= 0);
        part2 += ((be - as) * (bs - ae) <= 0);
    }

    printf( "Part 1: %d\n", part1 );
    printf( "Part 2: %d\n", part2 );
}