#include #include #include #include #include #include #include #include using namespace std; #define int long long #define FOR(i, a, b) for(int i=(a);i<(b);i++) #define RFOR(i, a, b) for(int i=(b-1);i>=(a);i--) #define REP(i, n) for(int i=0; i<(n); i++) #define RREP(i, n) for(int i=(n-1); i>=0; i--) #define ALL(a) (a).begin(),(a).end() #define UNIQUE_SORT(l) sort(ALL(l)); l.erase(unique(ALL(l)), l.end()); #define CONTAIN(a, b) find(ALL(a), (b)) != (a).end() #define array2(type, x, y) array, x> #define vector2(type) vector > #define out(...) //printf(__VA_ARGS__) typedef pair pos; int pos::*x = &pos::first; int pos::*y = &pos::second; int dxy[] = {0, 1, 0, -1, 0}; /*================================*/ pos p1, p2, p3; int len(pos p1, pos p2) { return pow(p1.*x - p2.*x, 2) + pow(p1.*y - p2.*y, 2); } signed main() { vector p(3); REP(i,3) cin >> p[i].*x >> p[i].*y; do { int len1 = len(p[0], p[1]); int len2 = len(p[0], p[2]); // 長さが違えばスキップ if (len1 != len2) continue; vector vec(2); REP(i,2) { vec[i].*x = p[i+1].*x - p[0].*x; vec[i].*y = p[i+1].*y - p[0].*y; } // 内積が0でない: 90°じゃないならスキップ if (vec[0].*x * vec[1].*x + vec[0].*y * vec[1].*y != 0) continue; // 4番目の座標を求める int x = p[1].first + vec[1].first; int y = p[1].second + vec[1].second; cout << x << " " << y << endl; return 0; } while (next_permutation(ALL(p))); cout << -1 << endl; return 0; }