Update last-stone-weight-ii.cpp

Author: kamyu104

C++/last-stone-weight-ii.cpp

@@ -5,14 +5,14 @@ class Solution {
 public:
     int lastStoneWeightII(vector<int>& stones) {
         unordered_set<int> dp = {0};
-        const auto& S = accumulate(stones.cbegin(), stones.cend(), 0);
         for (const auto& stone : stones) {
             auto tmp(dp);
             for (const auto& i : dp) {
                 tmp.emplace(i + stone);
             }
             dp = move(tmp);
         };
+        const auto& S = accumulate(stones.cbegin(), stones.cend(), 0);
         auto result = numeric_limits<int>::max();
         for (const auto& i : dp) {
             result = min(result, abs(i - (S - i)));