1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
#include "common.h"
#include <vector>
#include <iostream>
#include <stdint.h>
namespace aoc2022 {
enum oper {
add,
minus,
multiply,
division,
none,
};
struct monkey_math {
line_view op[3];
oper todo;
int64_t value = 0;
void print() const noexcept {
std::cout << op[0] << ": ";
if (todo == none) {
printf("%ld", value);
}
else {
char ops[] = {'+', '-', '*', '/'};
std::cout << op[1];
printf(" %c ", ops[(int) todo]);
std::cout << op[2];
}
printf("\n");
}
monkey_math() = default;
monkey_math(line_view lv) {
const char* p = lv.line;
op[0] = {p, 4};
if (*(p + 6) >= '0' && *(p + 6) <= '9') {
const char* p0 = p + 6;
while (*p0 >= '0' && *p0 <= '9') {
value = value * 10 + *p0 - '0';
p0++;
}
todo = none;
} else {
value = INT64_MAX;
op[1] = {p + 6, 4};
op[2] = {p + 13, 4};
switch (*(p + 11)) {
case '+':
todo = add;
break;
case '-':
todo = minus;
break;
case '*':
todo = multiply;
break;
case '/':
todo = division;
break;
}
}
}
};
std::pair<int64_t, int64_t> day21(line_view);
} // namespace aoc2022
|
