Robotti

#include <bits/stdc++.h>
using namespace std;

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int n;
    cin >> n;

    string* world = new string[n];
    for (int i = 0; i < n; i++) {
        string row;
        cin >> row;
        world[i] = row;
    }

    int posX = 0;
    int posY = -1;
    int dir = 3;

    int count = 0;
    while (true) {
        count++;
        if (dir == 0) {
            posX++;
            if (posX >= n) break;
            if (world[posY][posX] == '/') {
                dir = 1;
                world[posY][posX] = '\\';
            } else if (world[posY][posX] == '\\') {
                dir = 3;
                world[posY][posX] = '/';
            }
        } else if (dir == 1) {
            posY--;
            if (posY < 0) break;
            if (world[posY][posX] == '/') {
                dir = 0;
                world[posY][posX] = '\\';
            } else if (world[posY][posX] == '\\') {
                dir = 2;
                world[posY][posX] = '/';
            }
        } else if (dir == 2) {
            posX--;
            if (posX < 0) break;
            if (world[posY][posX] == '/') {
                dir = 3;
                world[posY][posX] = '\\';
            } else if (world[posY][posX] == '\\') {
                dir = 1;
                world[posY][posX] = '/';
            }
        } else {
            posY++;
            if (posY >= n) break;
            // cout << world[posY][posX] << endl;
            if (world[posY][posX] == '/') {
                dir = 2;
                world[posY][posX] = '\\';
            } else if (world[posY][posX] == '\\') {
                dir = 0;
                world[posY][posX] = '/';
            }
        }
    }

    count--;
    cout << count;
    return 0;
}

Test 1 (public)

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED