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#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "aocdailies.h"
#include "aocutils.h"
void aoc201505(char *data, size_t len) {
(void)len; // unused argument
unsigned lines = 0, nice = 0, nice2 = 0;
char *line = strtok(data, "\n"), *vtest;
char *line = strtok(data, "\n"), *curr;
unsigned nice = 0;
for (vtest = line; vtest[1]; vtest++) {
if (vtest[0] == vtest[1]) break;
for (curr = line; curr[1]; curr++) {
if (curr[0] == curr[1]) break;
}
if (vtest[0] == vtest[1]) {
if (curr[0] == curr[1]) {
unsigned vowels = 0;
for (vtest = line; *vtest; vtest++) {
if (strchr("aeiou", *vtest)) vowels++;
for (curr = line; *curr; curr++) {
if (strchr("aeiou", *curr)) vowels++;
if (vowels == 3) break;
}
nice += (vowels == 3);
}
}
}
}
}
line = strtok(NULL, "\n");
}
printf("There are %u nice strings.\n", nice);
line = data;
bool pair, hugged;
while (lines--) {
pair = hugged = false;
for (curr = line; curr[3]; curr++) {
char twostr[3] = {curr[0], curr[1], 0};
if (strstr(curr+2, twostr)) pair = true;
if (curr[0] == curr[2]) hugged = true;
if (pair && hugged) break;
}
if (pair) {
if (hugged) nice2++;
else if (curr[0] == curr[2]) nice2++;
else if (curr[1] == curr[3]) nice2++;
}
line += 1 + strlen(line); // go to next line, skip '\0' left from strtok
}
printf("There are %u nice strings under the new rules.\n", nice2);
}
void aoc201504(char *data, size_t len) {
data[--len] = 0; // remove newline, adjust `len`
char longkey[128];
unsigned extra = 1;
for (;;) {
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