add new solutions

solutions/1/q139/solution.go

@@ -0,0 +1,28 @@
+package q139
+
+func wordBreak(s string, wordDict []string) bool {
+	possible := make([]bool, len(s)+1)
+	possible[0] = true
+
+	for l := range possible {
+		if !possible[l] {
+			continue
+		}
+		for i := range wordDict {
+			newLen := len(wordDict[i]) + l
+			if newLen > len(s) {
+				continue
+			}
+			if possible[newLen] {
+				continue
+			}
+			if s[l:newLen] == wordDict[i] {
+				possible[newLen] = true
+			}
+		}
+	}
+
+	return possible[len(s)]
+}
+
+var _ = wordBreak