CSES - Datatähti 2025 alku - Results
Submission details
Task:Robotti
Sender:Oliver2
Submission time:2024-11-02 17:34:57 +0200
Language:C++ (C++20)
Status:READY
Result:0
Feedback
groupverdictscore
#10
#20
Test results
testverdicttimegroup
#1ACCEPTED0.00 s1, 2details
#2ACCEPTED0.00 s1, 2details
#3--1, 2details
#4ACCEPTED0.00 s1, 2details
#5--1, 2details
#6--1, 2details
#70.00 s1, 2details
#8ACCEPTED0.00 s1, 2details
#9ACCEPTED0.00 s1, 2details
#100.00 s1, 2details
#11--1, 2details
#12--2details
#13--2details
#140.01 s2details
#150.01 s2details
#16--2details
#17ACCEPTED0.01 s2details
#18--2details
#19--2details
#20ACCEPTED0.07 s2details
#21--2details
#22--2details
#230.10 s2details
#24--2details

Compiler report

input/code.cpp: In function 'int main()':
input/code.cpp:9:14: warning: unused variable 'temp' [-Wunused-variable]
    9 |         char temp;
      |              ^~~~
input/code.cpp:25:26: warning: 'robotSpot' may be used uninitialized in this function [-Wmaybe-uninitialized]
   25 |                 distLeft = robotSpot - *lt;
      |                 ~~~~~~~~~^~~~~~~~~~~~~~~~~

Code

#include <iostream>
#include <string>
#include <set>
using namespace std;
int main() {
	string input;
	long long n; cin >> n >> input;
	long long robotSpot, coinCount = 0, stepsTaken = 0;
	char temp;
	set<long long> coinSpots;
	for (long long i = 0; i < n; i++) {
		if (input[i] == '*') {
			coinSpots.insert(i);
		}
		else if (input[i] == 'R' ) {
			robotSpot = i;
		}
	}
	long long distLeft=0, distRight =0;
	while (coinSpots.empty() == false)
	{
		auto rt = coinSpots.lower_bound(robotSpot); // first coin right of robot
		auto lt = prev(rt); // first coin left of robotus
		distRight = *rt - robotSpot;
		distLeft = robotSpot - *lt;
		if (distRight == distLeft) {
			break;
		}
		else if (distRight < distLeft) {
			coinCount++;
			stepsTaken += distRight;
			robotSpot = *rt;
			coinSpots.erase(*rt);
		}
		else {
			coinCount++;
			stepsTaken += distLeft;
			robotSpot = *lt;
			coinSpots.erase(*lt);
		}
	}
	cout << stepsTaken << " " << coinCount;
	return 0;
}

Test details

Test 1

Group: 1, 2

Verdict: ACCEPTED

input
1
R

correct output
0 0

user output
0 0

Test 2

Group: 1, 2

Verdict: ACCEPTED

input
10
...R......

correct output
0 0

user output
0 0

Test 3

Group: 1, 2

Verdict:

input
10
**.R...***

correct output
12 5

user output
(empty)

Test 4

Group: 1, 2

Verdict: ACCEPTED

input
10
***R******

correct output
0 0

user output
0 0

Test 5

Group: 1, 2

Verdict:

input
1000
R................................

correct output
947 9

user output
(empty)

Test 6

Group: 1, 2

Verdict:

input
1000
.................................

correct output
886 9

user output
(empty)

Test 7

Group: 1, 2

Verdict:

input
1000
.....*..*....**..**..*......*....

correct output
1287 400

user output
-417 122

Test 8

Group: 1, 2

Verdict: ACCEPTED

input
1000
************.*****************...

correct output
0 0

user output
0 0

Test 9

Group: 1, 2

Verdict: ACCEPTED

input
1000
******************************...

correct output
0 0

user output
0 0

Test 10

Group: 1, 2

Verdict:

input
1000
R*****************************...

correct output
999 999

user output
-1997 999

Test 11

Group: 1, 2

Verdict:

input
1000
******************************...

correct output
999 999

user output
(empty)

Test 12

Group: 2

Verdict:

input
10000
.......**........*...........*...

correct output
10971 999

user output
(empty)

Test 13

Group: 2

Verdict:

input
10000
*..*....*......*.....*..*........

correct output
9999 999

user output
(empty)

Test 14

Group: 2

Verdict:

input
10000
*.*.*...**.*...*....**.**.**.....

correct output
18766 5000

user output
-573 4344

Test 15

Group: 2

Verdict:

input
10000
R*****************************...

correct output
9999 9999

user output
-19997 9999

Test 16

Group: 2

Verdict:

input
10000
******************************...

correct output
9999 9999

user output
(empty)

Test 17

Group: 2

Verdict: ACCEPTED

input
200000
.................................

correct output
0 0

user output
0 0

Test 18

Group: 2

Verdict:

input
200000
.................................

correct output
299934 10000

user output
(empty)

Test 19

Group: 2

Verdict:

input
200000
**.***....**..**.....***.*..*....

correct output
299998 100000

user output
(empty)

Test 20

Group: 2

Verdict: ACCEPTED

input
200000
******************************...

correct output
0 0

user output
0 0

Test 21

Group: 2

Verdict:

input
200000
R................................

correct output
133765 3

user output
(empty)

Test 22

Group: 2

Verdict:

input
200000
R................................

correct output
199982 5000

user output
(empty)

Test 23

Group: 2

Verdict:

input
200000
R*****************************...

correct output
199999 199999

user output
-399997 199999

Test 24

Group: 2

Verdict:

input
200000
******************************...

correct output
199999 199999

user output
(empty)