update 39 cpp solution

luliyucoordinate · luliyucoordinate · commit 934e6c5092f3 · 2019-01-23T08:32:25.000+08:00
diff --git a/src/0039-Combination-Sum/0039.cpp b/src/0039-Combination-Sum/0039.cpp
@@ -24,7 +24,7 @@ class Solution
             res.push_back(path);
             return;
         }
-        if (!path.empty() and target < *(path.end() - 1)) return;
+        if (!path.empty() and target < *(path.rbegin())) return;
         for (unsigned int i = index; i < candidates.size(); ++i)
         {
             path.push_back(candidates[i]);

Original file line number	Diff line number	Diff line change
`@@ -24,7 +24,7 @@ class Solution`
`24`	`24`	`res.push_back(path);`
`25`	`25`	`return;`
`26`	`26`	`}`
`27`		`- if (!path.empty() and target < *(path.end() - 1)) return;`
	`27`	`+ if (!path.empty() and target < *(path.rbegin())) return;`
`28`	`28`	`for (unsigned int i = index; i < candidates.size(); ++i)`
`29`	`29`	`{`
`30`	`30`	`path.push_back(candidates[i]);`