add new solutions

solutions/19/q1925/solution.go

@@ -0,0 +1,25 @@
+package q1925
+
+import "math"
+
+func countTriples(n int) int {
+	cnt := 0
+	for a := 1; a <= n; a++ {
+		for b := a; b <= n; b++ {
+			sqC := a*a + b*b
+			c := int(math.Sqrt(float64(sqC)))
+			if c > n {
+				break
+			}
+			if c*c == sqC { // c is integer
+				cnt += 2
+				if a == b {
+					cnt -= 1
+				}
+			}
+		}
+	}
+	return cnt
+}
+
+var _ = countTriples