#include<iostream> #include<unordered_map> #include<vector> using namespace std; int main() { int n, m; cin >> n >> m; //创建n大小的数组 vector<int> arrs; unordered_map<int, int> map; for (int i = 0;i < n;i++) { int x; cin >> x; arrs.push_back(x); map[x]++...