add new solutions

solutions/6/q649/solution.go

@@ -0,0 +1,51 @@
+package q649
+
+func predictPartyVictory(senate string) string {
+	n := len(senate)
+	revoked := make([]bool, n)
+
+	rRevoke, dRevoke := 0, 0
+	rRem, dRem := 0, 0
+	for i := range n {
+		switch senate[i] {
+		case 'R':
+			rRem++
+		case 'D':
+			dRem++
+		}
+	}
+
+	for i := 0; rRem > 0 && dRem > 0; i = (i + 1) % n {
+		if revoked[i] {
+			continue
+		}
+
+		switch senate[i] {
+		case 'R':
+			if rRevoke > 0 {
+				rRevoke--
+				rRem--
+				revoked[i] = true
+			} else {
+				dRevoke++
+			}
+
+		case 'D':
+			if dRevoke > 0 {
+				dRevoke--
+				dRem--
+				revoked[i] = true
+			} else {
+				rRevoke++
+			}
+		}
+	}
+
+	if rRem == 0 {
+		return "Dire"
+	} else {
+		return "Radiant"
+	}
+}
+
+var _ = predictPartyVictory