initial commit

This commit is contained in:
ShazidMahsrafi 2023-11-28 12:31:27 +06:00
parent 9e2d7677cc
commit b23bde0e50

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1901A Line Trip/1901A.cpp Normal file
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#include<bits/stdc++.h>
using namespace std;
// Short forms
#define int long long
#define ll long long
#define lld long double
#define ull unsigned long long
#define endl '\n'
#define ff first
#define ss second
#define all(x) x.begin(), x.end()
#define sz(x) (int)(x).size()
#define pb push_back
#define ppb pop_back
#define mp make_pair
#define ins insert
// STLs
#define PII pair<int, int>
#define VI vector<int>
#define VVI vector<vector<int>>
#define SI set<int>
#define SC set<char>
#define MII map<int,int>
#define VLL vector<ll>
#define VVL vector<vector<ll>>
#define SL set<ll>
// Outputs
#define yes cout<<"YES"<<endl
#define no cout<<"NO"<<endl
// Constants
#define PI 3.141592653589793238
#define INF LONG_LONG_MAX
#define MOD 1e9+7
// Faster Input Output
#define FAST_IO (ios_base:: sync_with_stdio(false),cin.tie(NULL));
// Maths
ll fact(ll n) { if(n==0) return 1; ll res = 1; for (ll i = 2; i <= n; i++) res = res * i; return res; }
ll nPr(ll n, ll r) { return fact(n) / fact(n - r); }
ll nCr(ll n, ll r) { return fact(n) / (fact(r) * fact(n - r)); }
ll gcd(ll a, ll b) { if (b == 0) return a; return gcd(b, a % b); }
ll lcm(ll a, ll b) { return (a * b) / gcd(a, b);}
ll mypow(ll a, ll b) { ll ans = 1; while(b){ if (b&1) ans = (ans*a) ; b /= 2; a = (a*a); } return ans; }
bool isPrime(ll n) { if(n <= 1) return false; for(ll i = 2; i <= sqrt(n); i++) if(n % i == 0) return false; return true; }
//Debugging
#ifndef ONLINE_JUDGE
#define dbg(x) cerr << #x <<" "; _print(x); cerr << endl;
#define dbgin(x) cerr << #x <<" "; _print(x); cerr << "; ";
#else
#define dbg(x)
#define dbgin(x)
#endif
void _print(int t) {cerr << t;}void _print(string t) {cerr << t;}void _print(char t) {cerr << t;}
void _print(lld t) {cerr << t;}void _print(double t) {cerr << t;}void _print(ull t) {cerr << t;}
template <class T, class V> void _print(pair <T, V> p);
template <class T> void _print(vector <T> v);template <class T> void _print(set <T> v);
template <class T, class V> void _print(map <T, V> v);template <class T> void _print(multiset <T> v);
template <class T, class V> void _print(pair <T, V> p) {cerr << "{"; _print(p.first); cerr << ","; _print(p.second); cerr << "}";}
template <class T> void _print(vector <T> v) {cerr << "[ "; for (T i : v) {_print(i); cerr << " ";} cerr << "]";}
template <class T> void _print(set <T> v) {cerr << "[ "; for (T i : v) {_print(i); cerr << " ";} cerr << "]";}
template <class T> void _print(multiset <T> v) {cerr << "[ "; for (T i : v) {_print(i); cerr << " ";} cerr << "]";}
template <class T, class V> void _print(map <T, V> v) {cerr << "[ "; for (auto i : v) {_print(i); cerr << " ";} cerr << "]";}
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
void solve()
{
int n,x;
cin>>n>>x;
VI v(n);
for(int i=0; i<n; ++i)
cin>>v[i];
int mx=0;
for(int i=1; i<n; ++i)
{
int dis=v[i]-v[i-1];
mx=max(mx,dis);
}
int ans=max(max(mx,2*(x-*--v.end())),*v.begin());
cout<<ans<<endl;
}
int32_t main()
{
FAST_IO;
int TC = 1;
cin >> TC;
while (TC--) solve();
}