Lang:G++
Edit12345678910111213141516171819202122232425262728293031#include <iostream>#include <fstream>#include <vector>#include <cstdio>#include <algorithm>#include <cmath>#include <map>#include <set>#include <stack>#include <sstream>#include <queue>#include<functional>#include<string>#include<sstream>#include<climits>#include<unordered_set>#include<regex>#include<bitset>#include<iomanip>#include<ctime>#include<cctype>#include <cstdlib>#include <cstdint>using namespace std;int main() {int n,m,target;//ifstream cin("in.txt");//ofstream cout("out.txt");cin >> n;vector<int> keys(n);for (size_t i = 0; i < n; i++)