CSES - HIIT Open 2018 - Results
Submission details
Task:Buy Low, Sell High
Sender:KnowYourArchitecture
Submission time:2018-05-26 11:30:13
Language:C++
Status:READY
Result:ACCEPTED
Test results
testverdicttime
#1ACCEPTED0.10 sdetails
#2ACCEPTED0.18 sdetails
#3ACCEPTED0.18 sdetails
#4ACCEPTED0.22 sdetails
#5ACCEPTED0.26 sdetails
#6ACCEPTED0.01 sdetails
#7ACCEPTED0.01 sdetails
#8ACCEPTED0.01 sdetails
#9ACCEPTED0.10 sdetails

Code

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef __int128 lll;


int main(){
	int n;
	cin>>n;
	vector<ll> p(n);
	for (ll &a : p) cin >> a;
	vector<ll> f(n);
	ll m = p[0];
	for (int i = 0; i < n; i++) {
		m = min(m, p[i]);
		f[i] = p[i] - m;
	}
	vector<ll> s(n);
	ll M = p[n-1];
	for (int i = n-1; i>=0; i--) {
		M = max(M, p[i]);
		s[i] = M - p[i];
	}
	ll B = 0;
	ll b = -1;
	for (int i = 0; i < n; i++) {
		B = max(B, f[i]);
		ll t = B + s[i];
		if (t > b) b = t;
	}
	for (int i=0;i<n;i++){
	//cout<<f[i]<<" "<<s[i]<<endl;
	}
	cout<<b<<endl;
}

Test details

Test 1

Verdict: ACCEPTED

input
500000
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...

correct output
0

user output
0

Test 2

Verdict: ACCEPTED

input
500000
1 2 3 4 5 6 7 8 9 10 11 12 13 ...

correct output
499999

user output
499999

Test 3

Verdict: ACCEPTED

input
500000
500000 499999 499998 499997 49...

correct output
0

user output
0

Test 4

Verdict: ACCEPTED

input
500000
617752857 533265574 365848360 ...

correct output
1999980408

user output
1999980408

Test 5

Verdict: ACCEPTED

input
500000
209620375 316066031 756114325 ...

correct output
1999992655

user output
1999992655

Test 6

Verdict: ACCEPTED

input
1
1

correct output
0

user output
0

Test 7

Verdict: ACCEPTED

input
2
1 1

correct output
0

user output
0

Test 8

Verdict: ACCEPTED

input
2
2 1

correct output
0

user output
0

Test 9

Verdict: ACCEPTED

input
500000
1 1000000000 2 2 2 2 2 2 2 2 2...

correct output
1999999998

user output
1999999998