56 lines
1.1 KiB
Go
56 lines
1.1 KiB
Go
package solutions
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import (
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"strconv"
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"strings"
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)
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func Day01Part01(isTest bool) int {
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input := ReadInput("01", isTest)
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values := strings.Split(input, "\n")
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remainders := make(map[int]bool)
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for _, valueStr := range values {
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value, err := strconv.Atoi(valueStr)
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if err != nil {
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panic("Error converting to int")
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}
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currentRemainder := 2020 - value
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if _, err := remainders[currentRemainder]; err {
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return value * currentRemainder
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} else {
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remainders[value] = true
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}
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}
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return -1
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}
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func Day01Part02(isTest bool) int {
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input := ReadInput("01", isTest)
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strValues := strings.Split(input, "\n")
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values := make([]int, len(strValues))
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for i, valueStr := range strValues {
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value, err := strconv.Atoi(valueStr)
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if err != nil {
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panic("Error converting to int")
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}
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values[i] = value
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}
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arrLen := len(values)
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for i := 0; i < arrLen; i += 1 {
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for j := i + 1; j < arrLen; j += 1 {
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for k := j + 1; k < arrLen; k += 1 {
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if values[i]+values[j]+values[k] == 2020 {
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return values[i] * values[j] * values[k]
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}
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}
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}
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}
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return -1
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}
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