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;
#define lp(i,n) for(int i=0;i<n;i++)
int ls[10][10];

char calc(string s){
  //cout<<s<<endl;
  int now=0;
  lp(i,4){
    int to=s[i]-'0';
    now=ls[now][to];
  }
  char c=now+'0';
  return c;
}

bool tr(string s){
  int now=0;
  lp(i,5){
    int to=s[i]-'0';
    now=ls[now][to];
  }
  if(now==0)return true;
  return false;
}


bool check(int x){
  string base="";
  lp(i,4){
    int num=x%10;
    x/=10;
    char c=num+'0';
    base=c+base;
  }

  string ch=base+calc(base);
  //cout<<" "<<base<<endl;
  lp(i,5){
    lp(j,10){
      string s=ch;
      s[i]='0'+j;
      if(s==ch)continue;
      if(tr(s))return false;
    } 
  }
  lp(i,4){
    string s=ch;
    swap(s[i],s[i+1]);
    if(s==ch)continue;
    if(tr(s))return false;
  }
  return true;
}

int main(){
  lp(i,10){
    lp(j,10){
      cin>>ls[i][j];
    }
  }
  int ans=10000;
  for(int i=0;i<10000;i++){
    if(check(i))ans--;
  }
  cout<<ans<<endl;
  return 0; 
}