Ruudukko

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

using namespace std;
using ll = long long int;

int main() {
    int n;
    cin >> n;
    vector<char> grid(n*n, '.');
    char cstr[600];

    for (int y = 0; y < n; y++) {
        cin >> cstr;
        for (int x = 0;x<n;x++) {
            grid[y*n+x] = cstr[x];
        }
    }

    int x = 0;
    int y = 0;
    string seq;

    while (!(x == n - 1 && y == n - 1)) {
        seq.push_back(grid[y*n+x]);
 
        if (x == n - 1) {
            y++;
        } else if (y == n - 1) {
            x++;
        } else {
            if (grid[n*(y+1)+x] > grid[n*y+x+1]) {
                x++;
            } else {
                y++;
            }
        }

    }
    seq.push_back(grid[y*n+x]);

    cout << seq << "\n";

    return 0;
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: ACCEPTED

Test 6

Group: 2

Verdict: ACCEPTED

Test 7

Group: 2

Verdict: WRONG ANSWER

Test 8

Group: 2

Verdict: WRONG ANSWER

Test 9

Group: 2

Verdict: WRONG ANSWER

Test 10

Group: 2

Verdict: WRONG ANSWER

Test 11

Group: 3

Verdict: ACCEPTED

Test 12

Group: 3

Verdict: WRONG ANSWER

Test 13

Group: 3

Verdict: WRONG ANSWER

Test 14

Group: 3

Verdict: WRONG ANSWER

Test 15

Group: 3

Verdict: WRONG ANSWER