#include <cstdlib> #include <cctype> #include <cstring> #include <cstdio> #include <cmath> #include <algorithm> #include <vector> #include <string> #include <iostream> #include <sstream> #include <map> #include <set> #include <queue> #include <stack> #include <numeric> #include <iomanip> #include <bitset> #include <list> #include <stdexcept> #include <functional> #include <utility> #include <ctime>using namespace std;#define MAX(a,b) ((a) > (b) ? (a) : (b))#define MIN(a,b) ((a) < (b) ? (a) : (b))#define MEM(a,b) memset((a),(b),sizeof(a))const int N = 1<<10;int a[N];int main(){int n;while(cin >> n){if(n == 0) break;int ans = 0;int cnt = 0;for(int i = 0; i < n; i++){cin >> a[i];ans ^= a[i];}if(!ans){cout << 0 << endl;}else{for(int i = 0; i < n; i++){if((ans^a[i]) <= a[i]){cnt++;}}cout << cnt << endl;}}return 0;}
