day 13 + 14
This commit is contained in:
parent
1f9aae4f16
commit
db394f7e14
4 changed files with 372 additions and 26 deletions
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@ -15,18 +15,18 @@
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files = (
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||||
26E2ACED257ED09000702405 /* Scanner+Extensions.swift in Sources */,
|
||||
26E2ACED257ED09000702405 /* Extensions.swift in Sources */,
|
||||
26E2ACD8257ECFFA00702405 /* main.swift in Sources */,
|
||||
26E2AD422581713A00702405 /* LoadData.swift in Sources */,
|
||||
);
|
||||
|
|
@ -785,7 +889,7 @@
|
|||
isa = PBXSourcesBuildPhase;
|
||||
buildActionMask = 2147483647;
|
||||
files = (
|
||||
26E2AD0A25800A1400702405 /* Scanner+Extensions.swift in Sources */,
|
||||
26E2AD0A25800A1400702405 /* Extensions.swift in Sources */,
|
||||
26E2ACFD258009FE00702405 /* main.swift in Sources */,
|
||||
26E2AD432581713A00702405 /* LoadData.swift in Sources */,
|
||||
);
|
||||
|
|
@ -795,7 +899,7 @@
|
|||
isa = PBXSourcesBuildPhase;
|
||||
buildActionMask = 2147483647;
|
||||
files = (
|
||||
26E2AD2F25816EE700702405 /* Scanner+Extensions.swift in Sources */,
|
||||
26E2AD2F25816EE700702405 /* Extensions.swift in Sources */,
|
||||
26E2AD2125816EE100702405 /* main.swift in Sources */,
|
||||
26E2AD442581713A00702405 /* LoadData.swift in Sources */,
|
||||
);
|
||||
|
|
@ -805,7 +909,7 @@
|
|||
isa = PBXSourcesBuildPhase;
|
||||
buildActionMask = 2147483647;
|
||||
files = (
|
||||
26E2AD65258343E300702405 /* Scanner+Extensions.swift in Sources */,
|
||||
26E2AD65258343E300702405 /* Extensions.swift in Sources */,
|
||||
26E2AD56258343D800702405 /* main.swift in Sources */,
|
||||
26E2AD71258343E600702405 /* LoadData.swift in Sources */,
|
||||
);
|
||||
|
|
@ -815,12 +919,32 @@
|
|||
isa = PBXSourcesBuildPhase;
|
||||
buildActionMask = 2147483647;
|
||||
files = (
|
||||
26E2AD942584A63300702405 /* Scanner+Extensions.swift in Sources */,
|
||||
26E2AD942584A63300702405 /* Extensions.swift in Sources */,
|
||||
26E2AD842584A61F00702405 /* main.swift in Sources */,
|
||||
26E2AD952584A63300702405 /* LoadData.swift in Sources */,
|
||||
);
|
||||
runOnlyForDeploymentPostprocessing = 0;
|
||||
};
|
||||
26E2ADA52586024700702405 /* Sources */ = {
|
||||
isa = PBXSourcesBuildPhase;
|
||||
buildActionMask = 2147483647;
|
||||
files = (
|
||||
26E2ADAC2586024700702405 /* main.swift in Sources */,
|
||||
26E2ADBD2586025000702405 /* LoadData.swift in Sources */,
|
||||
26E2ADBE2586025000702405 /* Extensions.swift in Sources */,
|
||||
);
|
||||
runOnlyForDeploymentPostprocessing = 0;
|
||||
};
|
||||
26E2ADDD25873BBD00702405 /* Sources */ = {
|
||||
isa = PBXSourcesBuildPhase;
|
||||
buildActionMask = 2147483647;
|
||||
files = (
|
||||
26E2ADE425873BBE00702405 /* main.swift in Sources */,
|
||||
26E2ADF625873BCB00702405 /* Extensions.swift in Sources */,
|
||||
26E2ADF725873BCB00702405 /* LoadData.swift in Sources */,
|
||||
);
|
||||
runOnlyForDeploymentPostprocessing = 0;
|
||||
};
|
||||
/* End PBXSourcesBuildPhase section */
|
||||
|
||||
/* Begin XCBuildConfiguration section */
|
||||
|
|
@ -1203,6 +1327,50 @@
|
|||
};
|
||||
name = Release;
|
||||
};
|
||||
26E2ADAD2586024700702405 /* Debug */ = {
|
||||
isa = XCBuildConfiguration;
|
||||
buildSettings = {
|
||||
CODE_SIGN_STYLE = Automatic;
|
||||
DEVELOPMENT_TEAM = 722B335UM5;
|
||||
ENABLE_HARDENED_RUNTIME = YES;
|
||||
PRODUCT_NAME = "$(TARGET_NAME)";
|
||||
SWIFT_VERSION = 5.0;
|
||||
};
|
||||
name = Debug;
|
||||
};
|
||||
26E2ADAE2586024700702405 /* Release */ = {
|
||||
isa = XCBuildConfiguration;
|
||||
buildSettings = {
|
||||
CODE_SIGN_STYLE = Automatic;
|
||||
DEVELOPMENT_TEAM = 722B335UM5;
|
||||
ENABLE_HARDENED_RUNTIME = YES;
|
||||
PRODUCT_NAME = "$(TARGET_NAME)";
|
||||
SWIFT_VERSION = 5.0;
|
||||
};
|
||||
name = Release;
|
||||
};
|
||||
26E2ADE625873BBE00702405 /* Debug */ = {
|
||||
isa = XCBuildConfiguration;
|
||||
buildSettings = {
|
||||
CODE_SIGN_STYLE = Automatic;
|
||||
DEVELOPMENT_TEAM = 722B335UM5;
|
||||
ENABLE_HARDENED_RUNTIME = YES;
|
||||
PRODUCT_NAME = "$(TARGET_NAME)";
|
||||
SWIFT_VERSION = 5.0;
|
||||
};
|
||||
name = Debug;
|
||||
};
|
||||
26E2ADE725873BBE00702405 /* Release */ = {
|
||||
isa = XCBuildConfiguration;
|
||||
buildSettings = {
|
||||
CODE_SIGN_STYLE = Automatic;
|
||||
DEVELOPMENT_TEAM = 722B335UM5;
|
||||
ENABLE_HARDENED_RUNTIME = YES;
|
||||
PRODUCT_NAME = "$(TARGET_NAME)";
|
||||
SWIFT_VERSION = 5.0;
|
||||
};
|
||||
name = Release;
|
||||
};
|
||||
/* End XCBuildConfiguration section */
|
||||
|
||||
/* Begin XCConfigurationList section */
|
||||
|
|
@ -1323,6 +1491,24 @@
|
|||
defaultConfigurationIsVisible = 0;
|
||||
defaultConfigurationName = Release;
|
||||
};
|
||||
26E2ADAF2586024700702405 /* Build configuration list for PBXNativeTarget "day13" */ = {
|
||||
isa = XCConfigurationList;
|
||||
buildConfigurations = (
|
||||
26E2ADAD2586024700702405 /* Debug */,
|
||||
26E2ADAE2586024700702405 /* Release */,
|
||||
);
|
||||
defaultConfigurationIsVisible = 0;
|
||||
defaultConfigurationName = Release;
|
||||
};
|
||||
26E2ADE525873BBE00702405 /* Build configuration list for PBXNativeTarget "day14" */ = {
|
||||
isa = XCConfigurationList;
|
||||
buildConfigurations = (
|
||||
26E2ADE625873BBE00702405 /* Debug */,
|
||||
26E2ADE725873BBE00702405 /* Release */,
|
||||
);
|
||||
defaultConfigurationIsVisible = 0;
|
||||
defaultConfigurationName = Release;
|
||||
};
|
||||
/* End XCConfigurationList section */
|
||||
};
|
||||
rootObject = 268D953125781DD80030EC4D /* Project object */;
|
||||
|
|
|
|||
|
|
@ -24,3 +24,10 @@ extension String {
|
|||
return result
|
||||
}
|
||||
}
|
||||
|
||||
extension Sequence {
|
||||
func print(_ prefix: String = "") -> Self {
|
||||
Swift.print(prefix, Array(self))
|
||||
return self
|
||||
}
|
||||
}
|
||||
61
day13/main.swift
Normal file
61
day13/main.swift
Normal file
|
|
@ -0,0 +1,61 @@
|
|||
import Foundation
|
||||
|
||||
let input = loadData(day: 13)
|
||||
|
||||
|
||||
let scanner = Scanner(string: input)
|
||||
|
||||
let startTime = scanner.scanInt()!
|
||||
|
||||
var busLines: [(Int, position: Int)] = []
|
||||
|
||||
var position = 0
|
||||
repeat {
|
||||
if let line = scanner.scanInt() {
|
||||
busLines.append((line, position))
|
||||
} else if scanner.string("x") {
|
||||
// Ignore
|
||||
}
|
||||
position += 1
|
||||
} while scanner.string(",")
|
||||
|
||||
let min = busLines
|
||||
.map { $0.0 }
|
||||
.map { ((startTime / $0) * $0 + $0, $0) }
|
||||
.print()
|
||||
.min(by: { $0.0 < $1.0 })!
|
||||
|
||||
|
||||
print((min.0 - startTime) * min.1)
|
||||
|
||||
let max = busLines.max(by: { $0.0 < $1.0 })!
|
||||
print(max)
|
||||
|
||||
/*
|
||||
brute force - takes too long
|
||||
|
||||
var s = sequence(first: 0, next: { $0 + max.0 })
|
||||
.lazy
|
||||
.filter { t in busLines.allSatisfy { (t - max.position + $0.position).isMultiple(of: $0.0 )} }
|
||||
.makeIterator()
|
||||
|
||||
print(s.next())
|
||||
|
||||
*/
|
||||
|
||||
var step = 0
|
||||
var time = 0
|
||||
|
||||
outer: while true {
|
||||
time += step
|
||||
|
||||
step = 1
|
||||
for (bus, position) in busLines {
|
||||
guard (time + position).isMultiple(of: bus) else { continue outer }
|
||||
step *= bus
|
||||
}
|
||||
|
||||
break
|
||||
}
|
||||
|
||||
print("part2", time)
|
||||
92
day14/main.swift
Normal file
92
day14/main.swift
Normal file
|
|
@ -0,0 +1,92 @@
|
|||
import Foundation
|
||||
let scanner = Scanner(string: loadData(day: 14))
|
||||
|
||||
|
||||
var maskBits: UInt64 = 0
|
||||
var maskUsed: UInt64 = 0
|
||||
|
||||
|
||||
var mem: [UInt64:UInt64] = [:]
|
||||
|
||||
|
||||
func readMask(_ mask: String) {
|
||||
assert(mask.count == 36)
|
||||
|
||||
maskBits = 0
|
||||
maskUsed = 0
|
||||
|
||||
for char in mask {
|
||||
maskBits <<= 1
|
||||
maskUsed <<= 1
|
||||
|
||||
switch char {
|
||||
case "1": maskBits |= 1
|
||||
case "0": break
|
||||
case "X": maskUsed |= 1
|
||||
default: assertionFailure("Invalid character in mask")
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func applyMask(_ value: UInt64) -> UInt64 {
|
||||
(value & maskUsed) | maskBits
|
||||
}
|
||||
|
||||
let maskSet = CharacterSet(charactersIn: "01X")
|
||||
|
||||
/*
|
||||
while !scanner.isAtEnd {
|
||||
if scanner.string("mask = "), let mask = scanner.scanCharacters(from: maskSet) {
|
||||
readMask(mask)
|
||||
} else if scanner.string("mem["), let addr = scanner.scanInt(), scanner.string("] = "), let value = scanner.scanUInt64() {
|
||||
mem[addr] = applyMask(value)
|
||||
} else {
|
||||
assertionFailure("Invalid input")
|
||||
}
|
||||
}
|
||||
*/
|
||||
|
||||
|
||||
func printPadded(_ val: UInt64) {
|
||||
let s = String(val, radix: 2)
|
||||
print(String(repeating: " ", count: 36 - s.count) + s)
|
||||
}
|
||||
|
||||
func possibleValues(_ mask: UInt64) -> [UInt64] {
|
||||
var values: [UInt64] = []
|
||||
var mask = mask
|
||||
for i in 0..<36 {
|
||||
if mask & 1 != 0 {
|
||||
let bit: UInt64 = 1 << i
|
||||
if values.isEmpty {
|
||||
values.append(0)
|
||||
values.append(bit)
|
||||
} else {
|
||||
values.append(contentsOf: values.map { $0 | bit })
|
||||
}
|
||||
}
|
||||
mask >>= 1
|
||||
}
|
||||
|
||||
return values
|
||||
}
|
||||
|
||||
func writeMem(_ addr: UInt64, _ value: UInt64) {
|
||||
for i in possibleValues(maskUsed) {
|
||||
let effective = i | ((addr | maskBits) & ~maskUsed)
|
||||
mem[effective] = value
|
||||
}
|
||||
}
|
||||
|
||||
while !scanner.isAtEnd {
|
||||
if scanner.string("mask = "), let mask = scanner.scanCharacters(from: maskSet) {
|
||||
readMask(mask)
|
||||
} else if scanner.string("mem["), let addr = scanner.scanUInt64(), scanner.string("] = "), let value = scanner.scanUInt64() {
|
||||
writeMem(addr, value)
|
||||
} else {
|
||||
assertionFailure("Invalid input")
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
print("sum", mem.values.reduce(0, +))
|
||||
Loading…
Add table
Reference in a new issue