Submission #473333

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Source Code Expand

#include <iostream> 
#include <string> 
#include <vector> 
#include <cmath> 
#include <algorithm> 
#include <cstdlib> 
#include <ctime> 
#include <cstdio> 
#include <functional> 
#include <set> 
#include <sstream> 
#include <cctype>
#include <stack>
#include <queue>
#include <cstring>
#include <map>

using namespace std; 

const int dx[]={0,1,0,-1};
const int dy[]={-1,0,1,0};

typedef pair<int,int> P;

int main(){

	int n;
	cin>>n;
	cout<<2*n<<endl;
}

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