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#include "aoc.h"
namespace aoc2016 {
static void get_number(const char** pp, int* d) {
const char* p = *pp;
*d = 0;
while (*p >= '0' && *p <= '9') {
*d = *d * 10 + *p - '0';
p++;
}
*pp = p;
}
static void check(const char** pp, int* t) {
int d[2] = {0};
const char* p = *pp;
int i = 0;
while (*p != ')') {
if (*p >= '0' && *p <= '9') {
get_number(&p, d + i++);
}
if (*p == '(' || *p == 'x') {
p++;
}
}
p += d[0];
*t += d[1] * d[0];
*pp = p;
}
int day9(line_view file) {
int t0{0};
const char* p1 = file.line;
const char* p2 = p1 + file.length - 1;
const char* p = p1;
while (p < p2) {
if (*p == '(') {
check(&p, &t0);
p++;
} else {
if (*p != ' ') {
t0++;
}
p++;
}
}
return t0;
}
} // namespace aoc2016
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