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| class Solution {
public boolean lemonadeChange(int[] bills) {
int five = 0, ten = 0;
for (int bill : bills) {
switch (bill) {
case 5 -> five++;
case 10 -> {
if (five > 0) {
five--;
ten++;
} else {
return false;
}
}
case 20 -> {
if (ten > 0 && five > 0) {
ten--;
five--;
} else if (five >= 3) {
five -= 3;
} else {
return false;
}
}
}
}
return true;
}
}
|
