utils

src/days/06/Day06.cpp

@@ -28,8 +28,8 @@ Result Day06::Task2() {
 vector<Day06::Record> Day06::parseRecords() const {
 	vector<Record> records;
 
-	vector<uint64> time = parseInts(input[0].substr(5));
-	vector<uint64> distance = parseInts(input[1].substr(10));
+	vector<uint64> time = parseUInts(input[0].substr(5));
+	vector<uint64> distance = parseUInts(input[1].substr(10));
 
 	for (size_t i = 0; i < time.size(); i++)
 		records.emplace_back(time[i], distance[i]);

src/util.cpp

@@ -46,7 +46,7 @@ bool isDigit(char c) {
 	return val >= 0 && val < 10;
 }
 
-vector<uint64> parseInts(const string &data) {
+vector<uint64> parseUInts(const string &data) {
 	vector<uint64> result;
 
 	uint64 value = 0;
@@ -66,5 +66,34 @@ vector<uint64> parseInts(const string &data) {
 	if (readingInt)
 		result.push_back(value);
 
+	return result;
+}
+
+vector<int64> parseInts(const string &data) {
+	vector<int64> result;
+
+	int64 value = 0;
+	bool readingInt = false;
+	bool negative = false;
+
+	for (const char c : data){
+		uint8_t digit;
+		if (isDigit(c, digit)) {
+			value = value * 10 + digit;
+			readingInt = true;
+		} else if (!readingInt && c == '-') {
+			negative = true;
+		} else if (readingInt){
+			readingInt = false;
+			result.push_back(value * (negative ? -1 : 1));
+			value = 0;
+			negative = false;
+		} else {
+			negative = false;
+		}
+	}
+	if (readingInt)
+		result.push_back(value);
+
 	return result;
 }

src/util.h

@@ -30,4 +30,5 @@ bool isDigit(char c, uint8_t &result);
 
 bool isDigit(char c);
 
-vector<uint64> parseInts(const string &data);
+vector<uint64> parseUInts(const string &data);
+vector<int64> parseInts(const string &data);