BUPT OJ 中序遍历序列

水

#include<iostream>#include<vector>#include<algorithm>using namespace std;int main(){      int t,n,x;  cin>>t;      while(t--){vector<int>BeforeSort;vector<int>AfterSort;cin>>n;while(n--){cin>>x;BeforeSort.push_back(x);}AfterSort=BeforeSort;sort(AfterSort.begin(),AfterSort.end());if(AfterSort==BeforeSort){cout<<"Yes\n";}else cout<<"No\n";} }