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
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
enum {
Halt,
Input,
Output,
};
struct Intcode {
int ip;
int mode[3];
int mem[1024];
int in;
int out;
};
static int *p(struct Intcode *m, int i) {
return (m->mode[i - 1] ? &m->mem[m->ip + i] : &m->mem[m->mem[m->ip + i]]);
}
static int run(struct Intcode *m) {
for (;;) {
m->mode[0] = m->mem[m->ip] / 100 % 10;
m->mode[1] = m->mem[m->ip] / 1000 % 10;
m->mode[2] = m->mem[m->ip] / 10000 % 10;
switch (m->mem[m->ip] % 100) {
break; case 1: *p(m, 3) = *p(m, 1) + *p(m, 2); m->ip += 4;
break; case 2: *p(m, 3) = *p(m, 1) * *p(m, 2); m->ip += 4;
break; case 3: *p(m, 1) = m->in; m->ip += 2; return Input;
break; case 4: m->out = *p(m, 1); m->ip += 2; return Output;
break; case 5: m->ip = (*p(m, 1) ? *p(m, 2) : m->ip + 3);
break; case 6: m->ip = (*p(m, 1) ? m->ip + 3 : *p(m, 2));
break; case 7: *p(m, 3) = (*p(m, 1) < *p(m, 2)); m->ip += 4;
break; case 8: *p(m, 3) = (*p(m, 1) == *p(m, 2)); m->ip += 4;
break; case 99: return Halt;
break; default: abort();
}
}
}
int main(void) {
int mem[1024] = {0};
for (int i = 0; EOF != scanf("%d,", &mem[i]); ++i);
struct Intcode amp[5] = {0};
int max = 0;
for (int p = 0; p <= 044444; ++p) {
int x = p;
for (int i = 0; i < 5; ++i) {
amp[i].in = x & 7;
x >>= 3;
}
for (int i = 0; i < 5; ++i) {
if (amp[i].in > 4) goto skip;
for (int j = 0; j < 5; ++j) {
if (i != j && amp[i].in == amp[j].in) goto skip;
}
}
for (int i = 0; i < 5; ++i) {
amp[i].ip = 0;
memcpy(amp[i].mem, mem, sizeof(amp[i].mem));
while (run(&[i]) != Input);
amp[i].in = (i ? amp[i - 1].out : 0);
while (run(&[i]) != Halt);
}
if (amp[4].out > max) max = amp[4].out;
skip:;
}
printf("%d\n", max);
max = 0;
for (int p = 0; p <= 044444; ++p) {
int x = p;
for (int i = 0; i < 5; ++i) {
amp[i].in = 5 + (x & 7);
amp[i].out = 0;
x >>= 3;
}
for (int i = 0; i < 5; ++i) {
if (amp[i].in > 9) goto skip2;
for (int j = 0; j < 5; ++j) {
if (i != j && amp[i].in == amp[j].in) goto skip2;
}
}
for (int i = 0; i < 5; ++i) {
amp[i].ip = 0;
memcpy(amp[i].mem, mem, sizeof(amp[i].mem));
run(&[i]);
}
amp[0].in = 0;
for (int i = 0;;) {
int x = run(&[i]);
if (x == Output) {
int out = amp[i].out;
i = (i + 1) % 5;
amp[i].in = out;
} else if (x == Halt) {
break;
}
}
if (amp[4].out > max) max = amp[4].out;
skip2:;
}
printf("%d\n", max);
}
|