Submission #199387

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
199387	2020-02-01 03:04:18	EntityIT	Triple Jump (JOI19_jumps)	C++14	100 / 100	1221 ms	99196 KiB

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/*
  Just consider the pair(a, b) such that with every a < k < b, a[a] > a[k] and a[b] > a[k]
  The number of these pairs is just O(n): the proof can be expressed by the code finding these pairs
  The rest is quite easy
*/
#include<bits/stdc++.h>
using namespace std;
#define all(x) (x).begin(), (x).end()
#define sz(x) ( (int)(x).size() )
using LL = long long;
const int inf = 1e9;
mt19937 rng( (uint32_t)chrono::steady_clock::now().time_since_epoch().count() );
template<class T>
inline bool asMn(T &a, const T &b) { return a > b ? a = b, true : false; }
template<class T>
inline bool asMx(T &a, const T &b) { return a < b ? a = b, true : false; }
int n;
vector<int> a;
struct Node {
  int mxA, mxOth, mx;
  Node(int _mxA = 0, int _mxOth = 0, int _mx = 0) : mxA(_mxA), mxOth(_mxOth), mx(_mx) {}
};
struct It {
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 14 / 14
• Subtask 3: 27 / 27
• Subtask 4: 54 / 54