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mirabilos
adventofcode.com
Commits
ecbd157e
Verified
Commit
ecbd157e
authored
6 months ago
by
mirabilos
Committed by
mirabilos
6 months ago
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2024/09/s2b.c
+228
-0
228 additions, 0 deletions
2024/09/s2b.c
2024/09/str
+1
-0
1 addition, 0 deletions
2024/09/str
i2c/str
+19
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19 additions, 0 deletions
i2c/str
with
248 additions
and
0 deletions
2024/09/s2b.c
0 → 100644
+
228
−
0
View file @
ecbd157e
/* with extra datastructures to perform better on evil inputs */
#include
<err.h>
#include
<stdio.h>
#include
<stdlib.h>
#include
<string.h>
#include
<unistd.h>
#include
"inputs.h"
#include
"evil_input.h"
#ifdef INSTD
#define INPUT argv[1]
#elif defined(EVIL1)
#define INPUT somewhat_evil_input
#elif defined(EVIL2)
#define INPUT really_evil_input
#elif !defined(INPUT)
#define INPUT I
#endif
#define FREE 0xFFFFFFFFU
struct
entry
{
unsigned
int
width
;
unsigned
int
prev
;
unsigned
int
next
;
unsigned
int
fno
;
};
#define NI 524288U
struct
entry
ent
[
NI
];
unsigned
int
nextinbucket
[
NI
];
unsigned
int
firstinbucket
[
10
]
=
{
FREE
,
FREE
,
FREE
,
FREE
,
FREE
,
FREE
,
FREE
,
FREE
,
FREE
,
FREE
,
};
static
void
chkbucket
(
int
where
)
{
#ifdef dovis3
int
i
;
unsigned
int
n
;
int
e
=
0
;
for
(
i
=
1
;
i
<=
9
;
++
i
)
{
printf
(
"bucket(%d): "
,
i
);
n
=
firstinbucket
[
i
];
while
(
n
!=
FREE
)
{
if
(
ent
[
n
].
width
==
i
)
printf
(
"%u
\033
[0m "
,
n
);
else
{
printf
(
"
\033
[5m%u(%u)
\033
[0m "
,
n
,
ent
[
n
].
width
);
e
=
1
;
}
if
(
nextinbucket
[
n
]
!=
FREE
&&
nextinbucket
[
n
]
<=
n
)
{
printf
(
"
\033
[1m"
);
e
=
1
;
}
n
=
nextinbucket
[
n
];
}
printf
(
"END
\033
[0m
\n
"
);
}
printf
(
"chkbucket(%d): %s
\n
"
,
where
,
e
?
"ERROR"
:
"ok"
);
#endif
}
int
main
(
int
argc
,
char
*
argv
[])
{
size_t
i
,
j
,
k
,
fl
;
unsigned
long
long
curblk
,
sum
,
nextblk
;
unsigned
char
ch
;
#ifdef INSTD
if
(
argc
!=
2
)
errx
(
1
,
"Usage: ./a.out $(<inputfile)"
);
#endif
i
=
0
;
while
((
ch
=
INPUT
[
i
]))
{
if
(
ch
<
'0'
||
ch
>
'9'
)
errx
(
2
,
"invalid input char: %02X"
,
(
unsigned
int
)
ch
);
ent
[
i
].
width
=
(
unsigned
int
)
ch
-
(
unsigned
int
)
'0'
;
ent
[
i
].
prev
=
i
-
1U
;
ent
[
i
].
next
=
i
+
1U
;
if
(
i
&
1U
)
{
ent
[
i
].
fno
=
FREE
;
}
else
{
ent
[
i
].
fno
=
i
/
2U
;
}
++
i
;
}
ent
[
0
].
prev
=
0
;
ent
[
i
].
width
=
0
;
ent
[
i
].
prev
=
i
-
1U
;
ent
[
i
].
next
=
i
;
ent
[
i
].
fno
=
FREE
;
fl
=
i
+
1
;
/* freelist */
j
=
i
--
;
#ifdef dovis2
j
=
0
;
while
(
ent
[
j
].
next
!=
j
)
{
unsigned
int
x
;
ch
=
ent
[
j
].
fno
==
FREE
?
'.'
:
'0'
+
ent
[
j
].
fno
;
x
=
ent
[
j
].
width
;
while
(
x
--
)
putchar
(
ch
);
j
=
ent
[
j
].
next
;
}
printf
(
"
\n
"
);
#endif
do
{
j
-=
2
;
nextinbucket
[
j
]
=
firstinbucket
[
ent
[
j
].
width
];
firstinbucket
[
ent
[
j
].
width
]
=
j
;
}
while
(
j
>
1
);
chkbucket
(
0
);
while
(
i
)
{
#ifdef dovis3
printf
(
"i(%u) fno(%u) prev(%u)
\n
"
,
(
unsigned
)
i
,
(
unsigned
)
ent
[
i
].
fno
,
(
unsigned
)
ent
[
i
].
prev
);
#endif
if
(
ent
[
i
].
fno
==
FREE
)
goto
nexti
;
j
=
k
=
ent
[
i
].
width
;
while
(
++
j
<=
9
)
if
(
firstinbucket
[
k
]
==
FREE
||
(
firstinbucket
[
j
]
!=
FREE
&&
firstinbucket
[
j
]
<
firstinbucket
[
k
]))
k
=
j
;
if
((
j
=
firstinbucket
[
k
])
==
FREE
||
j
>
i
)
goto
nexti
;
/* move */
/* free free-bucket */
firstinbucket
[
k
]
=
nextinbucket
[
j
];
#ifdef dovis3
printf
(
"D: taking first (%u) from bucket %u, next is %u
\n
"
,
(
unsigned
)
j
,
(
unsigned
)
k
,
(
unsigned
)
firstinbucket
[
k
]);
#endif
/* easy move? */
if
(
ent
[
j
].
width
==
ent
[
i
].
width
)
{
ent
[
j
].
fno
=
ent
[
i
].
fno
;
ent
[
i
].
fno
=
FREE
;
}
else
{
ent
[
fl
].
width
=
ent
[
i
].
width
;
ent
[
fl
].
prev
=
ent
[
j
].
prev
;
ent
[
ent
[
fl
].
prev
].
next
=
fl
;
ent
[
fl
].
next
=
j
;
ent
[
j
].
prev
=
fl
;
ent
[
fl
].
fno
=
ent
[
i
].
fno
;
ent
[
i
].
fno
=
FREE
;
ent
[
j
].
width
-=
ent
[
i
].
width
;
if
(
++
fl
==
NI
)
errx
(
1
,
"out of space"
);
chkbucket
(
3
);
/* put at right space in new bucket */
if
(
j
<
firstinbucket
[
ent
[
j
].
width
])
{
nextinbucket
[
j
]
=
firstinbucket
[
ent
[
j
].
width
];
firstinbucket
[
ent
[
j
].
width
]
=
j
;
chkbucket
(
1
);
}
else
{
k
=
firstinbucket
[
ent
[
j
].
width
];
while
(
nextinbucket
[
k
]
<
j
)
k
=
nextinbucket
[
k
];
/* now: k < j < nextinbucket[k] */
nextinbucket
[
j
]
=
nextinbucket
[
k
];
nextinbucket
[
k
]
=
j
;
chkbucket
(
2
);
}
}
#ifdef dovis2
j
=
0
;
while
(
ent
[
j
].
next
!=
j
)
{
unsigned
int
x
;
ch
=
ent
[
j
].
fno
==
FREE
?
'.'
:
'0'
+
ent
[
j
].
fno
;
x
=
ent
[
j
].
width
;
while
(
x
--
)
putchar
(
ch
);
j
=
ent
[
j
].
next
;
}
printf
(
"
\n
"
);
#endif
nexti:
#if 0 /* I used this in s2.c but it can never have worked?! */
i = ent[i].prev;
#else
i
-=
2
;
#endif
}
#ifdef dovis
i
=
0
;
while
(
ent
[
i
].
next
!=
i
)
{
unsigned
int
x
;
ch
=
ent
[
i
].
fno
==
FREE
?
'.'
:
'0'
+
ent
[
i
].
fno
;
x
=
ent
[
i
].
width
;
while
(
x
--
)
putchar
(
ch
);
i
=
ent
[
i
].
next
;
}
printf
(
"
\n
"
);
#endif
i
=
0
;
curblk
=
0
;
sum
=
0
;
while
(
ent
[
i
].
next
!=
i
)
{
nextblk
=
curblk
+
ent
[
i
].
width
;
if
(
ent
[
i
].
fno
!=
FREE
)
{
sum
+=
(
nextblk
*
(
nextblk
-
1U
)
-
curblk
*
(
curblk
-
1U
))
/
2U
*
ent
[
i
].
fno
;
}
curblk
=
nextblk
;
i
=
ent
[
i
].
next
;
}
printf
(
"%llu
\n
"
,
sum
);
return
(
0
);
}
This diff is collapsed.
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2024/09/str
0 → 120000
+
1
−
0
View file @
ecbd157e
../../i2c/str
\ No newline at end of file
This diff is collapsed.
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i2c/str
0 → 100755
+
19
−
0
View file @
ecbd157e
#!/bin/mksh
set -e
doone() {
print -r -- "static const char I[] = \"$(
sed 's/[\\"]/\\&/g' <"$1" #'"
)\";"
}
exec >inputs.h
print '#ifndef PROD'
print
doone c
print
print '#else'
print
doone i
print
print '#endif'
exec >/dev/null
exit 0
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