CSES - Datatähti 2025 alku - Results
Submission details
Task:Robotti
Sender:Pikaksi
Submission time:2024-10-28 21:37:30 +0200
Language:C++ (C++20)
Status:READY
Result:0
Feedback
groupverdictscore
#10
#20
Test results
testverdicttimegroup
#10.00 s1, 2details
#20.00 s1, 2details
#30.00 s1, 2details
#40.00 s1, 2details
#50.00 s1, 2details
#60.00 s1, 2details
#70.00 s1, 2details
#80.00 s1, 2details
#90.00 s1, 2details
#100.00 s1, 2details
#110.00 s1, 2details
#120.00 s2details
#130.00 s2details
#140.00 s2details
#150.00 s2details
#160.00 s2details
#170.00 s2details
#180.00 s2details
#190.00 s2details
#200.00 s2details
#210.00 s2details
#220.00 s2details
#230.00 s2details
#240.00 s2details

Compiler report

input/code.cpp: In function 'int main()':
input/code.cpp:16:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |     for (int i = 0; i < input.size(); i++) {
      |                     ~~^~~~~~~~~~~~~~
input/code.cpp:6:9: warning: unused variable 'a' [-Wunused-variable]
    6 |     int a;
      |         ^
input/code.cpp:14:9: warning: variable 'robotClosest' set but not used [-Wunused-but-set-variable]
   14 |     int robotClosest;
      |         ^~~~~~~~~~~~
input/code.cpp:43:37: warning: 'robotPlace' may be used uninitialized in this function [-Wmaybe-uninitialized]
   43 |             moved += abs(robotPlace - *rooms.begin());
      |                          ~~~~~~~~~~~^~~~~~~~~~~~~~~~

Code

#include <bits/stdc++.h>

int main()
{
    uint64_t moved = 0, coins = 0;
    int a;
    std::string input = "**.*......*.R*...*..";
    //                   012345678901234
    //std::cin >> a;
    //std::cin >> input;

    std::set<int> rooms;
    int robotPlace;
    int robotClosest;
    
    for (int i = 0; i < input.size(); i++) {
        if (input[i] == '*') {
            rooms.insert(i);
        }
        else if (input[i] == 'R') {
            robotPlace = i;
            robotClosest = rooms.size();
        }
    }

    /*std::set<int>::iterator close = rooms.begin();
    for (int i = 0; i < robotClosest - 1; i++) {
        close++;
    }*/

    /*for (int number : rooms) {
        std::cout << "number = " << number << "\n";
    }
    std::cout << robotPlace << "\n";
    std::cout << robotClosest << "\n";
    std::cout << (rooms.lower_bound(robotPlace) == rooms.end()) << "\n";
    std::cout << *(rooms.lower_bound(robotPlace));*/

    while (true) {
        auto nextRoom = rooms.lower_bound(robotPlace);

        if (rooms.size() == 1) {
            moved += abs(robotPlace - *rooms.begin());
            coins += 1;
            break;
        }

        if (nextRoom == rooms.end()) {
            nextRoom--;
            moved += abs(robotPlace - *nextRoom);
            robotPlace = *nextRoom;
            coins += 1;
        }
        else {
            int d1 = abs(robotPlace - *nextRoom);
            nextRoom--;
            int d2 = abs(robotPlace - *nextRoom);
            nextRoom++;
            if (d1 == d2) {
                break;
            }
            else if (d1 < d2) {
                moved += d1;
                coins++;
                robotPlace = *nextRoom;
                rooms.erase(nextRoom);
            }
            else {
                moved += d2;
                coins++;

                nextRoom--;
                robotPlace = *nextRoom;
                rooms.erase(nextRoom);
            }
        }
    }

    std::cout << moved << " " << coins;
}

Test details

Test 1

Group: 1, 2

Verdict:

input
1
R

correct output
0 0

user output
4 2

Test 2

Group: 1, 2

Verdict:

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

correct output
0 0

user output
4 2

Test 3

Group: 1, 2

Verdict:

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

correct output
12 5

user output
4 2

Test 4

Group: 1, 2

Verdict:

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

correct output
0 0

user output
4 2

Test 5

Group: 1, 2

Verdict:

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

correct output
947 9

user output
4 2

Test 6

Group: 1, 2

Verdict:

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

correct output
886 9

user output
4 2

Test 7

Group: 1, 2

Verdict:

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

correct output
1287 400

user output
4 2

Test 8

Group: 1, 2

Verdict:

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

correct output
0 0

user output
4 2

Test 9

Group: 1, 2

Verdict:

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

correct output
0 0

user output
4 2

Test 10

Group: 1, 2

Verdict:

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

correct output
999 999

user output
4 2

Test 11

Group: 1, 2

Verdict:

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

correct output
999 999

user output
4 2

Test 12

Group: 2

Verdict:

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

correct output
10971 999

user output
4 2

Test 13

Group: 2

Verdict:

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

correct output
9999 999

user output
4 2

Test 14

Group: 2

Verdict:

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

correct output
18766 5000

user output
4 2

Test 15

Group: 2

Verdict:

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

correct output
9999 9999

user output
4 2

Test 16

Group: 2

Verdict:

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

correct output
9999 9999

user output
4 2

Test 17

Group: 2

Verdict:

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

correct output
0 0

user output
4 2

Test 18

Group: 2

Verdict:

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

correct output
299934 10000

user output
4 2

Test 19

Group: 2

Verdict:

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

correct output
299998 100000

user output
4 2

Test 20

Group: 2

Verdict:

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

correct output
0 0

user output
4 2

Test 21

Group: 2

Verdict:

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

correct output
133765 3

user output
4 2

Test 22

Group: 2

Verdict:

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

correct output
199982 5000

user output
4 2

Test 23

Group: 2

Verdict:

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

correct output
199999 199999

user output
4 2

Test 24

Group: 2

Verdict:

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

correct output
199999 199999

user output
4 2