#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */  
    int n,m,k,ans1=0,ans2=0;
    cin>>n>>m>>k;
    int l;
    for(int i=0;i<n;i++)
        {
               cin>>l>>l>>l>>l;
        if(i%2)
        ans1+=l;
        ans2+=l;
        
    }
    n%2&&l%2&&k%2==0?cout<<ans1:cout<<ans2;
    return 0;
}