#include <bits/stdc++.h>
using namespace std;
int main() {
    int a[110][110]={0}; 
    int i=0,j=0,n=0,h=0,sun=0,w=0;
    cin>>n;
    for (i=1;i<=n;i++){
        for (j=1;j<=n;j++){
            cin>>a[i][j];
        }
    }
    for(i=1;i<=n;i++){
        for(j=1;j<=n;j++){
            h=0;
            while(a[i][j]!=0){
                w=a[i][j]%10;
                h=h+w;
                a[i][j]=a[i][j]/10; 
            }
            if(h%2==0){
                sun++;
            }    
        }
    }
    cout<<sun;
    return 0;
}
/**************************************************************
	Problem: 1496
	User: panyuchen
	Language: C++
	Result: Wrong Answer
****************************************************************/