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蟠桃记

Time Limit : 2000/1000ms (Java/Other)   Memory Limit : 65536/32768K (Java/Other)

Total Submission(s) : 50   Accepted Submission(s) : 42

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Problem Description

Input

Output

Sample Input

2
4

Sample Output

4
22

Author

Source

#include <iostream>
#include <cstdio>
using namespace std;
int main(){
    int a[31]={0,1},i;
    for(i=2;i<31;++i){
        a[i]=(a[i-1]+1)*2;
    }
    int k;
    while(cin>>k){
        printf("%d\n",a[k]);
    }
    return 0;
}

HDU 蟠桃记

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原文地址：http://blog.csdn.net/zp___waj/article/details/46381539