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12345678910111213141516171819202122#include using namespace std; int main(){ int x1, x2, x3, y1, y2, y3, x4, y4; cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3; if (x1 == x2) x4 = x3; else if (x1 == x3) x4 = x2; else x4 = x1; if (y1 == y2) y4 = y3; else if (y1 == y3) y4 = y2; else y4 = y1; cout