#include #define EPS 1e-9 #define INF 1070000000LL #define MOD 1000000007LL #define fir first #define foreach(it,X) for(auto it=(X).begin();it!=(X).end();it++) #define numa(x,a) for(auto x: a) #define ite iterator #define mp make_pair #define rep(i,n) rep2(i,0,n) #define rep2(i,m,n) for(int i=m;i<(n);i++) #define pb push_back #define pf push_front #define sec second #define sz(x) ((int)(x).size()) #define ALL( c ) (c).begin(), (c).end() #define gcd(a,b) __gcd(a,b) #define mem(x,n) memset(x,n,sizeof(x)) #define endl "\n" using namespace std; template void deploy(std::ostream &os, const TUPLE &tuple){} template void deploy(std::ostream &os, const TUPLE &t){ os << (POS == 0 ? "" : ", ") << get(t); deploy(os, t); } template std::ostream& operator<<(std::ostream &os, std::pair &p){ os << "(" << p.first <<", " << p.second <<")";return os; } template std::ostream& operator<<(std::ostream &os, std::vector &v){ int remain = v.size(); os << "{"; for(auto e: v) os << e << (--remain == 0 ? "}" : ", "); return os; } template std::ostream& operator<<(std::ostream &os, std::set &v){ int remain = v.size(); os << "{"; for(auto e: v) os << e << (--remain == 0 ? "}" : ", "); return os; } template std::ostream& operator<<(std::ostream &os, std::map &mp){ int remain = mp.size(); os << "{"; for(auto e: mp) os << "(" << e.first << " -> " << e.second << ")" << (--remain == 0 ? "}" : ", "); return os; } #define DEBUG1(var0) { std::cerr << (#var0) << "=" << (var0) << endl; } #define DEBUG2(var0, var1) { std::cerr << (#var0) << "=" << (var0) << ", ";DEBUG1(var1); } #define DEBUG3(var0, var1, var2) { std::cerr << (#var0) << "=" << (var0) << ", ";DEBUG2(var1,var2); } #define DEBUG4(var0, var1, var2, var3) { std::cerr << (#var0) << "=" << (var0) << ", ";DEBUG3(var1,var2,var3); } using ll = long long; template std::vector GaussianElimination(std::vector > A,std::vector b){//pivot selection for(int k = 0; k < A.size();k++){ T u_max = A[k][k]; T u_maxindex = k; for(int i = k+1; i < A.size();i++){ if(u_max < A[i][k]){ u_max = A[i][k]; u_maxindex = i; } } std::swap(A[k],A[u_maxindex]); std::swap(b[k],b[u_maxindex]); T u = A[k][k]; A[k][k] = 1; for(int j = k+1;j < A.size();j++){ A[k][j] = A[k][j] / u; } b[k] /= u; for(int i = k+1;i < A.size();i++){ T u = A[i][k]; A[i][k] = 0; for(int j = k+1;j < A.size();j++){ A[i][j] -= u * A[k][j]; } b[i] -= u * b[k]; } } std::vector x(A.size()); for(int i = A.size()-1;i>=0;i--){ T other = 0; for(int j = i+1;j < A.size();j++){ other += A[i][j] * x[j]; } b[i] -= other; x[i] = b[i] / A[i][i]; } return x; } int main() { cin.tie(0); ios_base::sync_with_stdio(0); int N; cin >> N; vector nums(N); vector > A(N,vector (N,1)); rep(i,N){ cin >> nums[i]; A[i][i] = 0; } vector x = GaussianElimination(A,nums); cout << count(ALL(x),2) << " " << count(ALL(x),4) << endl; return 0; }