10107.cpp

#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <queue>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <ctime>

typedef unsigned int uint;
typedef long long int64;
typedef unsigned long long uint64;

using namespace std;

int main(){
    vector <int64> vec;
    vector <int64>::iterator it;
    int64 num, val;
    while(cin>>num){
              
              vec.push_back(num);
              
              sort(vec.begin(), vec.end());
              
              int len = (int) vec.size();
              int cen = (int) len/2;
              
              if(len%2 == 0)
                       val = ( vec[cen] + vec[cen-1] ) / 2;
              else
                  val = vec[cen];
              
              cout<<val<<endl;
    }
    return 0;
}