cppjieba动态规划部分代码有bug

[rookie-J]

参考python版本计算动态规划的逻辑，将CalcDP函数的计算顺序改为从后往前就可以了。
可直接替换代码如下：

void CalcDP(vector& dags) const {
size_t dagSize = dags.size();
size_t nextPos;
const DictUnit* p;
double val;

  for(size_t i = 0; i < dagSize; i++){
      dags[dagSize - i - 1].pInfo = NULL;
      dags[dagSize - i - 1].weight = MIN_DOUBLE;
      assert(!dags[dagSize - i - 1].nexts.empty());
      for(LocalVector<pair<size_t, const DictUnit*> >::const_iterator it = dags[dagSize - i - 1].nexts.begin();
          it != dags[dagSize - i - 1].nexts.end(); it++) {
          nextPos = it->first;
          p = it->second;
          val = 0.0;
          if(nextPos + 1 < dags.size()) {
              val += dags[nextPos + 1].weight;
          }

          if(p) {
              val += p->weight;
          } else {
              val += dictTrie_->GetMinWeight();
          }
          if(val > dags[dagSize - i - 1].weight) {
              dags[dagSize - i - 1].pInfo = p;
              dags[dagSize - i - 1].weight = val;
          }
      }
  }

}

[moyu505]

解决的bug，能举例几个吗

[dawnranger]

作者本来用的就是从后往前遍历的逻辑(rbegin/rend)
见代码:
https://github.com/yanyiwu/cppjieba/blob/master/include/cppjieba/MPSegment.hpp#L85