#include #define FOR(i,a,b) for (int i=(a);i<(b);i++) #define FORR(i,a,b) for (int i=(a);i>=(b);i--) #define pb push_back #define pcnt __builtin_popcount #define show(x) cout<<#x<<" = "< pii; typedef vector vi; typedef vector vvi; typedef vector vpii; typedef set si; typedef pair pll; typedef vector vl; typedef vector vvl; typedef vector vpll; typedef set sl; templatestring join(vector&v) {stringstream s;FOR(i,0,sz(v))s<<' '<b)swap(a,b);for(;a>0;b%=a,swap(a,b));return b;} int modpow(ll a,ll n,int m){if(a==0)return a;ll p=1;for(;n>0;n/=2,a=a*a%m)if(n&1)p=p*a%m;return (int)p;} const int iinf = 1e9; const ll linf = 4e18; const int mod = 1e9+7; const double eps = 1e-10; int n, f[24][24], dp[1<<24]; main(){ cin.tie(0); ios::sync_with_stdio(false); cin >> n; FOR(i, 0, n)FOR(j, 0, n)cin >> f[i][j]; int b, n2=n/4*2+n%4, k, l, id, ma, d; FOR(i, 2, 1< n2 || b%2 > 0)continue; ma = 0; id = 31-__builtin_clz(i); k = i - (1<>j)&1){ d = f[id][j] + dp[k-l]; if(ma < d)ma = d; } } dp[i] = ma; } ma = 0; k = (1<