39 lines
873 B
Markdown
Executable File
39 lines
873 B
Markdown
Executable File
# algorithm_2024
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algorithm_2024
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## 错题本
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### Luogu某题
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#### 数组越界导致变量异常更改
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### [OJ4980:拯救行动](http://noi.openjudge.cn/ch0205/4980/)
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#### 未考虑无答案（特殊情况）时输出
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#### 优先对联是从大到小排序，重载运算符时需反向或者std::greater
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```cpp
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struct Status{
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Point now;
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ll step;
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bool operator<(const Status &that)const noexcept{
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return this->step > that.step;
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}
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};
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std::priority_queue<Status> q;
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```
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### [P1330](https://www.luogu.com.cn/problem/P1330)
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#### BFS时注意初始化一开始的去重数组
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```cpp
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void bfs(){
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for(ll i{1};i<=n;i++){
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color_sum[1]=color_sum[2]=0;
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if(vis[i])continue;
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q.push(i);
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set_color(i, 1);
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vis[i]=true; // 注意初始化错误
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while(!q.empty()){
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``` |