F - Second Largest Query

 F - Second Largest Query (atcoder.jp)

#include <iostream>
#include <string>
#include <stack>
#include <vector>
#include <queue>
#include <deque>
#include <set>
#include <map>
#include <unordered_map>
#include <unordered_set>
#include <algorithm>
#include <cstdlib>
#include <cstdio>
#include <cstring>
#include <cmath>
#include <numeric>
#include <functional>
#include <climits>
//#include <windows.h>
using namespace std;
#define ll long long  
#define db double
#define PII pair<int, int>
#define TUP tuple<int, int, int>
const int inf = 0x3f3f3f3f;
ll mod = 1e15 + 17;
ll q_pow(ll a, ll b) { ll ret = 1; while (b) { if (b & 1)ret = ret * a % mod; b >>= 1; a = a * a % mod; }return ret; }
ll gcd(ll