Submission #173965

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Source Code Expand

#include <string>
#include <vector>
#include<iostream>
#include<cstdio>
#include<cstdlib>
#include<stack>
#include<queue>
#include<cmath>
#include<algorithm>
#include<functional>
//--
#include<list>
#include<deque>
#include<bitset>
#include<set>
#include<map>
#include<cstdio>
#include<cstring>
#include<sstream>
#define X first
#define Y second
#define pb push_back
#define pqPair priority_queue<pair<int,int>,vector<pair<int,int> >,greater<pair<int,int> > >
#define all(X) (X).begin(),(X).end()

using namespace std;
typedef long long ll;

int main(){
  int n;
  cin>>n;
  cout<<n/2<<endl;
  return 0;
}

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