Fix potential div by zero

main.go

@@ -73,6 +73,10 @@ func (c *Criteria) Meets(c2 *Criteria) bool {
 
 func (c *Criteria) Score(c2 *Criteria) int64 {
 	if c2.ScoreMode == "time" {
+        time := float64(c.Time)
+        if time < 1 {
+            time = 1
+        }
 		return int64(c2.Coefficient / float64(c.Time))
 	}
 	if c2.ScoreMode == "points" {