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LemonadeChange.java
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LemonadeChange.java
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/**
* 860. Lemonade Change
* @author LBW
*/
public class LemonadeChange {
public boolean lemonadeChange(int[] bills) {
int[] remains = new int[3];
for (int i = 0; i < bills.length; i++) {
if (bills[i] == 5) {
remains[0] += 1;
}
else if (bills[i] == 10) {
if (remains[0] == 0) {
return false;
}
else {
remains[0] -= 1;
remains[1] += 1;
}
}
else { // bills[i] == 20
int need = 15;
if (remains[1] > 0) {
need -= 10;
remains[1] -= 1;
}
while (need > 0 && remains[0] > 0) {
remains[0] -= 1;
need -= 5;
}
if (need > 0)
return false;
}
}
return true;
}
}