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Solution.kt
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Solution.kt
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package g0801_0900.s0860_lemonade_change
// #Easy #Array #Greedy #Programming_Skills_II_Day_17
// #2023_04_03_Time_413_ms_(86.96%)_Space_47.3_MB_(65.22%)
class Solution {
fun lemonadeChange(bills: IntArray): Boolean {
var countFive = 0
var countTen = 0
for (bill in bills) {
if (bill == 5) {
countFive++
} else if (bill == 10) {
if (countFive == 0) {
return false
}
countFive--
countTen++
} else if (bill == 20) {
if (countFive > 0 && countTen > 0) {
countFive--
countTen--
} else if (countFive >= 3) {
countFive -= 3
} else {
return false
}
}
}
return true
}
}