Robotti

input/code.cpp: In function 'std::vector<int> CollectCoins(int, std::string, std::vector<int>)':
input/code.cpp:16:53: warning: comparison of integer expressions of different signedness: 'std::size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   16 |         if (DistanceLeft==DistanceRight || CoinLeft == -1 && CoinRight == -1) {
      |                                            ~~~~~~~~~^~~~~
input/code.cpp:16:72: warning: comparison of integer expressions of different signedness: 'std::size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   16 |         if (DistanceLeft==DistanceRight || CoinLeft == -1 && CoinRight == -1) {
      |                                                              ~~~~~~~~~~^~~~~
input/code.cpp:16:59: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   16 |         if (DistanceLeft==DistanceRight || CoinLeft == -1 && CoinRight == -1) {
      |                                            ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~...

#include <iostream>
#include <string>
#include <vector>

std::vector<int> CollectCoins(int Rooms, std::string Layout, std::vector<int> Output) {
	std::size_t CurRobot = Layout.find("R");

	// Distance to the first coin left
	std::size_t CoinLeft = Layout.find_last_of("*", CurRobot);
	std::size_t DistanceLeft = CurRobot - CoinLeft;

	// Distance to the first coin right
	std::size_t CoinRight = Layout.find_first_of("*", CurRobot);
	std::size_t DistanceRight = CoinRight - CurRobot;

	if (DistanceLeft==DistanceRight || CoinLeft == -1 && CoinRight == -1) {
		return Output;
	}

	Layout[CurRobot] = '.';
	Output[1]++;

	if (DistanceLeft<DistanceRight) {
		Output[0] += DistanceLeft;
		Layout[CoinLeft] = 'R';
	} else {
		Output[0] += DistanceRight;
		Layout[CoinRight] = 'R';
	}
	std::cout << Layout << "\n";

	return CollectCoins(Rooms, Layout, Output);
}

int main () {
	// Input:
	// n rooms
	// Building layout
	// 	e.g.
	// 	20
	// 	**.*......*.R*...*..
	// * = coin; . = empty; R = robot
	int Rooms;
	std::string Layout;
	std::cin >> Rooms;
	std::cin >> Layout;

	// GOAL: Find the max number of coins the robot can collect by always going to
	// the closest coin
	std::vector<int> Output = {0,0};
	Output = CollectCoins(Rooms, Layout, Output);
	int Steps = Output[0];
	int Coins = Output[1];

	std::cout << Steps << " " << Coins << "\n";
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 1, 2

Verdict: ACCEPTED

Test 3

Group: 1, 2

Verdict: RUNTIME ERROR

Test 4

Group: 1, 2

Verdict: ACCEPTED

Test 5

Group: 1, 2

Verdict: OUTPUT LIMIT EXCEEDED

Test 6

Group: 1, 2

Verdict: WRONG ANSWER

Test 7

Group: 1, 2

Verdict: WRONG ANSWER

Test 8

Group: 1, 2

Verdict: ACCEPTED

Test 9

Group: 1, 2

Verdict: ACCEPTED

Test 10

Group: 1, 2

Verdict: WRONG ANSWER

Test 11

Group: 1, 2

Verdict: WRONG ANSWER

Test 12

Group: 2

Verdict: OUTPUT LIMIT EXCEEDED

Test 13

Group: 2

Verdict: WRONG ANSWER

Test 14

Group: 2

Verdict: OUTPUT LIMIT EXCEEDED

Test 15

Group: 2

Verdict: WRONG ANSWER

Test 16

Group: 2

Verdict: OUTPUT LIMIT EXCEEDED

Test 17

Group: 2

Verdict: ACCEPTED

Test 18

Group: 2

Verdict: OUTPUT LIMIT EXCEEDED

Test 19

Group: 2

Verdict: OUTPUT LIMIT EXCEEDED

Test 20

Group: 2

Verdict: ACCEPTED

Test 21

Group: 2

Verdict: OUTPUT LIMIT EXCEEDED

Test 22

Group: 2

Verdict: OUTPUT LIMIT EXCEEDED

Test 23

Group: 2

Verdict: WRONG ANSWER

Test 24

Group: 2

Verdict: OUTPUT LIMIT EXCEEDED