#include <iostream>
#include <algorithm>
#include <string>
#include <map>
using namespace std;
int matrix[5][5];
int dx[4] = {-1, 1, 0, 0};
int dy[4] = {0, 0, -1, 1};
map<string, int> info;
void DFS(int x, int y, int cnt, string s)
{
if (cnt == 6)
{
if (info.count(s) == 0)
{
info[s] = 1;
}
return;
}
for (int i = 0; i < 4; i++)
{
int nx = x + dx[i];
int ny = y + dy[i];
if (nx < 0 || ny < 0 || nx >= 5 || ny >= 5) continue;
DFS(nx, ny, cnt + 1, s + to_string(matrix[nx][ny]));
}
}
int main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
for (int i = 0; i < 5; i++)
{
for (int j = 0; j < 5; j++)
{
cin >> matrix[i][j];
}
}
for (int i = 0; i < 5; i++)
{
for (int j = 0; j < 5; j++)
{
DFS(i, j, 0, "");
}
}
cout << info.size() << "\n";
return 0;
}
DFS와 재귀 응용 문제였다.
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