CSES - HIIT Open 2018 - Results
Submission details
Task:Buy Low, Sell High
Sender:Oispa nutellaa
Submission time:2018-05-26 14:00:13
Language:C++
Status:READY
Result:
Test results
testverdicttime
#1ACCEPTED0.07 sdetails
#2ACCEPTED0.08 sdetails
#30.07 sdetails
#40.10 sdetails
#5ACCEPTED0.10 sdetails
#6ACCEPTED0.01 sdetails
#7ACCEPTED0.01 sdetails
#80.02 sdetails
#9ACCEPTED0.07 sdetails

Code

#include <iostream>

using namespace std;
typedef long long ll;

int n;
ll t[500005];
ll dp[500005];

ll res = 0;

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cin >> n;
	for (int i = 0; i < n; ++i) {
		cin >> t[i];
	}
	ll cmi = 1000000005;
	for (int i = 0; i < n; ++i) {
		cmi = min(t[i], cmi);
		dp[i] = t[i]-cmi;
		if (i > 0) dp[i] = max(dp[i], dp[i-1]);
	}
	ll cmx = 0;
	cmi = 1000000005;
	for (int i = n-1; i >= 0; --i) {
		cmx = max(t[i], cmx);
		cmi = min(t[i], cmi);
		res = max(res, dp[i]+(cmx-cmi));
	}
	cout << res << "\n";
	return 0;
}

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:

input
500000
500000 499999 499998 499997 49...

correct output
0

user output
499999

Test 4

Verdict:

input
500000
617752857 533265574 365848360 ...

correct output
1999980408

user output
1999991184

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:

input
2
2 1

correct output
0

user output
1

Test 9

Verdict: ACCEPTED

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

correct output
1999999998

user output
1999999998