1082: 【入门】猴子吃桃子

递推

#include<bits/stdc++.h>
using namespace std;
int x=0,f=1;
int main(){
    for (int i = 0; i < 9; ++i) {
        x = 2*(f+1);
        f = x;
    }
    cout<<x<<endl;
    return 0;
}