Problem: Example

Input

0 3 1 7 5 9 8 6 4 2
7 0 9 2 1 5 4 8 6 3
4 2 0 6 8 7 1 3 5 9
1 7 5 0 9 8 3 4 2 6
6 1 2 3 0 4 5 9 7 8
3 6 7 4 2 0 9 5 8 1
5 8 6 9 7 2 0 1 3 4
8 9 4 5 3 6 2 0 1 7
9 4 3 8 6 1 7 2 0 5
2 5 8 1 4 3 6 7 9 0


Output

0

Solution (in CPP):

Solution:
#include <string>
#include <iostream>
#include <algorithm>
using namespace std;
int x[11][11];
int check(string s) {
	int ret = 0;
	for (int i = 0; i < s.size(); i++) ret = x[ret][s[i] - 48];
	return ret;
}
int main() {
	for (int i = 0; i < 10; i++) {
		for (int j = 0; j < 10; j++) {
			cin >> x[i][j];
		}
	}
	int ret = 0;
	for (int i = 0; i < 10000; i++) {
		string s = to_string(i);
		while (s.size() < 4) s = '0' + s;
		int e = check(s);
		string t = s + (char)(e + 48);
		bool flag = true;
		for (int j = 0; j < 5; j++) {
			for (int k = 0; k < 10; k++) {
				string r = t; r[j] = k + 48;
				if (r == t) continue;
				if (check(r) == 0) flag = false;
			}
		}
		for (int j = 0; j < 4; j++) {
			string r = t; swap(r[j], r[j + 1]);
			if (r == t) continue;
			if (check(r) == 0) flag = false;
		}
		if (!flag) ret++;
	}
	cout << ret << endl;
	return 0;
}