CF570B 数形结合

Author: EndlessCheng

main/500-599/570B.go

@@ -0,0 +1,21 @@
+package main
+
+import (
+	. "fmt"
+	"io"
+)
+
+// github.com/EndlessCheng/codeforces-go
+func CF570B(in io.Reader, out io.Writer) {
+	var n, m int
+	Fscan(in, &n, &m)
+	if n == 1 && m == 1 {
+		Fprint(out, 1)
+	} else if m*2 > n {
+		Fprint(out, m-1)
+	} else {
+		Fprint(out, m+1)
+	}
+}
+
+//func main() { CF570B(os.Stdin, os.Stdout) }

main/500-599/570B_test.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+	"github.com/EndlessCheng/codeforces-go/main/testutil"
+	"testing"
+)
+
+// https://codeforces.com/problemset/problem/570/B
+// https://codeforces.com/problemset/status/570/problem/B
+func TestCF570B(t *testing.T) {
+	// just copy from website
+	rawText := `
+inputCopy
+3 1
+outputCopy
+2
+inputCopy
+4 3
+outputCopy
+2`
+	testutil.AssertEqualCase(t, rawText, 0, CF570B)
+}