Update stone-game-ix.cpp

Author: kamyu104

C++/stone-game-ix.cpp

@@ -9,7 +9,7 @@ class Solution {
             ++count[x % 3];
         }
         if (count[0] % 2 == 0) {
-            // if both counts are not zero, then alice takes the least one at first, the remains are deterministic for bob to lose:
+            // iff both counts are not zero, then alice takes the least one at first, the remains are deterministic for bob to lose:
             // - assumed count[1] is the least one:
             //   1(,1,2)*,2,(,2)* => bob loses
             //            ^
@@ -18,7 +18,7 @@ class Solution {
             //            ^
             return count[1] && count[2];
         }
-        // if abs(count[1]-count[2]) >= 3, then alice takes the most one at first, the remains are deterministic for bob to lose:
+        // iff abs(count[1]-count[2]) >= 3, then alice takes the most one at first, the remains are deterministic for bob to lose:
         // - assumed count[1] is the most one
         //   1(,1,2)*,0,1(,2,1)*,1,(,1)* => bob loses
         //                       ^