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<bits/stdc++.h>

using namespace std;

int table[10][10];

int check(vector<int> &vec){
	int cur = 0;
	for(auto v : vec){
		cur = table[cur][v];
	}
	return cur;
}

int main(){
	for(int i = 0; i < 10; i++){
		for(int j = 0; j < 10; j++){
			cin >> table[i][j];
		}
	}
	int ans = 0;
	for(int i = 0; i < 10000; i++){
		vector<int> vec;
		int num = i;
		for(int j = 0; j < 4; j++){
			vec.push_back(num % 10);
			num /= 10;
		}
		reverse(vec.begin(), vec.end());
		vec.push_back(check(vec));
		//for(auto v : vec) cout << v << " ";
		//cout << endl;

		bool flg = true;	
		for(int i = 0; flg && i < 5; i++){
			for(int j = 0; j < 10; j++){
				if(vec[i] == j) continue;
				int tmp = vec[i];
				vec[i] = j;
				if(check(vec) == 0){
					flg = false;
					break;
				}
				vec[i] = tmp;
			}
		}

		for(int i = 0; flg && i < 4; i++){
			if(vec[i] != vec[i + 1]){
				swap(vec[i], vec[i + 1]);
				if(check(vec) == 0){
					flg = false;
					break;
				}
				swap(vec[i], vec[i + 1]);
			}
		}
		if(!flg){
			ans++;
		}
	}
	cout << ans << endl;
}