CF1270C 构造

Author: EndlessCheng

main/1200-1299/1270C.go

@@ -0,0 +1,28 @@
+package main
+
+import (
+	"bufio"
+	. "fmt"
+	"io"
+)
+
+// github.com/EndlessCheng/codeforces-go
+func CF1270C(_r io.Reader, _w io.Writer) {
+	in := bufio.NewReader(_r)
+	out := bufio.NewWriter(_w)
+	defer out.Flush()
+
+	var T, n, v int64
+	for Fscan(in, &T); T > 0; T-- {
+		var s, xor int64
+		for Fscan(in, &n); n > 0; n-- {
+			Fscan(in, &v)
+			s += v
+			xor ^= v
+		}
+		Fprintln(out, 2)
+		Fprintln(out, xor, s+xor)
+	}
+}
+
+//func main() { CF1270C(os.Stdin, os.Stdout) }

main/1200-1299/1270C_test.go

@@ -0,0 +1,29 @@
+package main
+
+import (
+	"github.com/EndlessCheng/codeforces-go/main/testutil"
+	"testing"
+)
+
+// https://codeforces.com/problemset/problem/1270/C
+// https://codeforces.com/problemset/status/1270/problem/C
+func TestCF1270C(t *testing.T) {
+	// just copy from website
+	rawText := `
+inputCopy
+3
+4
+1 2 3 6
+1
+8
+2
+1 1
+outputCopy
+0
+
+2
+4 4
+3
+2 6 2`
+	testutil.AssertEqualCase(t, rawText, 0, CF1270C)
+}