A - Four Points

https://atcoder.jp/contests/abc246/submissions/30628742

AtCoder/ABC246/A/A.cpp

@@ -0,0 +1,30 @@
+#include <iostream>
+
+using std::cin;
+using std::cout;
+const char endl = '\n';
+
+int main() {
+    std::ios::sync_with_stdio(false);
+
+    int x1, x2, x3, y1, y2, y3;
+    cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3;
+
+    if (x1 == x2) {
+        cout << x3 << ' ';
+    } else if (x1 == x3) {
+        cout << x2 << ' ';
+    } else {  // x2 == x3
+        cout << x1 << ' ';
+    }
+
+    if (y1 == y2) {
+        cout << y3 << endl;
+    } else if (y1 == y3) {
+        cout << y2 << endl;
+    } else {  // y2 == y3
+        cout << y1 << endl;
+    }
+
+    return 0;
+}