Ruudukko

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

int n;
string m[500];
string b[500][500];
bool up[500][500] = {0};

void sett(int x, int y) {
  if(x == 0) {
    up[y][x] = 1;
  }
  else if(y == 0) {
    up[y][x] = 0;
  } else {
    up[y][x] = m[y - 1][x] < m[y][x - 1]; 
  }
}

string str;

void print(int x, int y) {
  str.push_back(m[y][x]);
  if(x == 0 && y == 0) return;
  if(up[y][x]) {
    print(x, y - 1);
  } else {
    print(x - 1, y);
  }
}

int main() {
  cin.sync_with_stdio(0);
  cin >> n;
  for(int y = 0; y < n; ++y) {
    cin >> m[y];
  }
  b[0][0] = m[0][0];
  for(int y = 0; y < n; ++y) {
    for(int x = 0; x < n; ++x) {
      if(x == 0 && y == 0) continue;
      sett(x, y);
    }
  }
  print(n - 1, n - 1);
  for(int i = str.size() - 1; i >= 0; --i) {
    cout << str[i];
  }
  cout << "\n";
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: WRONG ANSWER

Test 4

Group: 1

Verdict: WRONG ANSWER

Test 5

Group: 1

Verdict: WRONG ANSWER

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