whytherearepeople不会

include<bits/stdc++.h>
using namespace std;
long long a,ans=1;
int main()
{
	cin>>a;
	for(int i=1;i<=a;i++)ans = (ans+1)*2;
	cout<<ans;
	return 0;
}

#include<bits/stdc++.h>
#include <math.h>
#include <stack>
#include <stdio.h>
#include <iostream>
#include <vector>
#include <iomanip>
#include <string>
#include <algorithm>
using namespace std;
int main(){
    int n,m=1;
    cin>>n;
    while(n>0){
        m=(m+1)*2;
        n--;
    }
    cout<<m;
}

#include #include #include using namespace std; int main() { int n,sum=1; cin>>n; for(int i=1;i<=n;i=i+1) { sum=2*(sum+1); } cout<<sum; return 0; }

/************************************
Note Book:
************************************/
#include <iostream>
#include <cstdio>
#include <iomanip>
#include <cmath>
#include <algorithm>
#include <cstring>
#include <string>
#include <stack>
#include <queue>
#include <math.h>
#define LL long long
using namespace std;
const int INF = 0x3f3f3f3f;
const int N = 1e5 + 10;
int n , shuliang = 1; 
int main()
{
	cin >> n;
	while( n-- )
	{
		shuliang = shuliang + 1;
		shuliang = shuliang * 2; 
	}
	cout << shuliang;
	return 0;
}

//dev c++[[990.cpp]]*******

//dev c++[top fanil]]******

//dev c++*www.temege.com

#include <stdio.h>

#include

#include <math.h>

#include

#include

#include

#include

#include <string.h>

#include

using namespace std;

#define LL long long

const int N=1e6+10;

const int INF=0x3f3f3f3f;

int a[110];

int main()

{

int n;

cin>>n;

int sum=1;

while(n--)

{

	sum=(sum+1)*2;

}

cout<<sum<<endl;

return 0;

}