diff options
| -rw-r--r-- | 2018/day19.c | 78 |
1 files changed, 69 insertions, 9 deletions
diff --git a/2018/day19.c b/2018/day19.c index 5802ffa..eed25e1 100644 --- a/2018/day19.c +++ b/2018/day19.c @@ -88,25 +88,85 @@ int main(void) { uint len = 0; struct Ins { - char op[4]; - uint a, b, c; + uint op, a, b, c; } prog[50]; while (!feof(stdin)) { + char code[4]; scanf( "%4c %u %u %u\n", - prog[len].op, &prog[len].a, &prog[len].b, &prog[len].c + code, &prog[len].a, &prog[len].b, &prog[len].c ); + for (uint i = 0; i < 16; ++i) { + if (strncmp(code, Ops[i].name, 4)) continue; + prog[len].op = i; + break; + } len++; } while (cpu.r[cpu.ip] < len) { struct Ins ins = prog[cpu.r[cpu.ip]]; - for (uint i = 0; i < 16; ++i) { - if (strncmp(ins.op, Ops[i].name, 4)) continue; - cpu = Ops[i].fn(cpu, ins.a, ins.b, ins.c); - cpu.r[cpu.ip]++; - break; - } + cpu = Ops[ins.op].fn(cpu, ins.a, ins.b, ins.c); + cpu.r[cpu.ip]++; } printf("%u\n", cpu.r[0]); + + /* + 00: addi ip 16 ip goto 17 + 01: seti 1 _ r5 r5 = 1 + 02: seti 1 _ r3 r3 = 1 + 03: mulr r5 r3 r2 r2 = r5 * r3 + 04: eqrr r2 r4 r2 r2 = (r2 == r4) + 05: addr r2 ip ip if r2 goto 7 else goto 6 + 06: addi ip 1 ip goto 8 + 07: addr r5 r0 r0 r0 += r5 + 08: addi r3 1 r3 r3 += 1 + 09: gtrr r3 r4 r2 r2 = (r3 > r4) + 10: addr ip r2 ip if r2 goto 12 else goto 11 + 11: seti 2 _ ip goto 3 + 12: addi r5 1 r5 r5 += 1 + 13: gtrr r5 r4 r2 r2 = (r5 > r4) + 14: addr r2 ip ip if r2 goto 16 else goto 15 + 15: seti 1 _ ip goto 2 + 16: mulr ip ip ip halt + 17: addi r4 2 r4 r4 += 2 + 18: mulr r4 r4 r4 r4 *= r4 + 19: mulr ip r4 r4 r4 *= 19 + 20: muli r4 11 r4 r4 *= 11 + 21: addi r2 5 r2 r2 += 5 + 22: mulr r2 ip r2 r2 *= 22 + 23: addi r2 12 r2 r2 += 12 + 24: addr r4 r2 r4 r4 += r2 + 25: addr ip r0 ip if r0 goto 27 else goto 26 + 26: seti 0 _ ip goto 1 + 27: setr ip _ r2 r2 = 27 + 28: mulr r2 ip r2 r2 *= 28 + 29: addr ip r2 r2 r2 += 29 + 30: mulr ip r2 r2 r2 *= 30 + 31: muli r2 14 r2 r2 *= 14 + 32: mulr r2 ip r2 r2 *= 32 + 33: addr r4 r2 r4 r4 += r2 + 34: seti 0 _ r0 r0 = 0 + 35: seti 0 _ ip goto 1 + */ + +#if 0 + uint sum = 0; + uint big = 10551358; + for (uint a = 1; a <= big; a++) { + for (uint b = 1; b <= big; b++) { + if (a * b == big) sum += a; + } + } + printf("%u\n", r0); +#endif + + uint big = 10551358; + uint sum = 1 + big; + for (uint f = 2; big > 1; ++f) { + if (big % f) continue; + sum += f; + big /= f; + } + printf("%u\n", sum); } |