周一幫你看
public class Du {
public static void main(String[] args) {
final int days = 10;//假設10天吃完,這個可以修改任意天數(shù)
int peach = calcPeachForMonkey(days);

System.out.println("Total " + peach + " for a monkey in " + days + " days");
}
private static int calcPeachForMonkey(final int days) {
int peach = 0;//初始化桃子總數(shù)為0

while(true){
int temp = peach;
int day = 0;

while(peach >= 0){
peach = peach /2 - 1;//驗證每天吃一半,再吃掉一個
day++;//每次吃掉一半多一個,天數(shù)+1
}

if(day == days){//如果天數(shù)剛好和要吃掉桃子的天數(shù)相等,就找到桃子總數(shù)了
return temp;
}

peach = temp + 2;//每次桃子+2,因為吃掉一半那桃子總數(shù)必定為偶數(shù)
}
}
}
------------------------------10天測試
Total 1022 for a monkey in 10 days
-----------------7天吃完測試
Total 126 for a monkey in 7 days