CF682A

Author: EndlessCheng

main/600-699/682A.go

@@ -0,0 +1,19 @@
+package main
+
+import (
+	. "fmt"
+	"io"
+)
+
+// github.com/EndlessCheng/codeforces-go
+func CF682A(in io.Reader, out io.Writer) {
+	var n, m, ans int64
+	Fscan(in, &n, &m)
+	for i := int64(1); i <= 5; i++ {
+		j := (5-i)%5 + i - i%5
+		ans += (n - i + 5) / 5 * ((m - j + 5) / 5)
+	}
+	Fprint(out, ans)
+}
+
+//func main() { CF682A(os.Stdin, os.Stdout) }

main/600-699/682A_test.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"github.com/EndlessCheng/codeforces-go/main/testutil"
+	"testing"
+)
+
+// https://codeforces.com/problemset/problem/682/A
+// https://codeforces.com/problemset/status/682/problem/A
+func TestCF682A(t *testing.T) {
+	// just copy from website
+	rawText := `
+inputCopy
+6 12
+outputCopy
+14
+inputCopy
+11 14
+outputCopy
+31
+inputCopy
+1 5
+outputCopy
+1
+inputCopy
+3 8
+outputCopy
+5
+inputCopy
+5 7
+outputCopy
+7
+inputCopy
+21 21
+outputCopy
+88`
+	testutil.AssertEqualCase(t, rawText, 0, CF682A)
+}