UVA - 10000 .cpp file

///    Md.ASADUZZAMAN
///    Dept of ICT
///    MBSTU
#include<bits/stdc++.h>
using namespace std;


#define fr(i,a,b) for(int i=(a);i<(b);i++)
#define rfr(i,a,b) for(int i=(b-1);i>=(a);i--)
#define freach(i, c) for( __typeof( (c).begin() ) i = (c).begin(); i != (c).end(); ++i )
#define rep(i,n) for(int i=0;i<(n);i++)
#define rrep(i,n) for(int i=(n)-1;i>=0;i--)
#define forit(it, s) for(__typeof(s.begin()) it = s.begin(); it != s.end(); it++)


#define PINF INT_MAX
#define MINF INT_MIN
#define pb push_back
#define mp make_pair
#define all(a) (a).begin(),(a).end()
#define mset(a,c) memset(a,c,sizeof a)
#define clr(a) memset(a,0,sizeof a)
#define pii pair<int,int>
#define pcc pair<char,char>
#define pic pair<int,char>
#define pci pair<char,int>
#define psi pair<sting,int>
#define pis pair<int,string>
#define ff first
#define ss second
#define vs vector<string>
#define vi vector<int>
#define vll vector<long long>
#define vpi vector<pair<int,int> >
#define vpl vector<pair<long long,long long> >


#define qi  queue<int>
#define ql  queue<long>
#define qll queue<long long>
#define PQ priority_queue

#define mpii map<int,int>
#define mpsi map<string,int>
#define mpci map<char,int>
#define mpll map<long long,long long>


#define bug(x) cout<<#x<<": "<<x<<endl
#define bug1(x,y) cout<<#x<<": "<<x<<"  |  "<<#y<<": "<<y<<endl
#define bug2(x,y,z) cout<<#x<<": "<<x<<"  |  "<<#y<<": "<<y<<" "<<#z<<": "<<z<<endl

#define min(a,b) (a>b?b:a)
#define max(a,b) (a>b?a:b)
#define pi acos(-1.0)
#define rad(x) (((1.0 * x * pi) / 180.0))
#define deg(x) (((x * 180.0) / (1.0 * pi)))
#define sinr(x) (sin(rad(x)))
#define cosr(x) (cos(rad(x)))
#define tanr(x) (tan(rad(x)))
#define asind(x) (deg((asin(x))))
#define acosd(x) (deg((acos(x))))
#define atand(x) (deg((atan(x))))

#define setbiton(x, i) (x |= (1 << i))
#define setbitoff(x, i) (x ^= (1 << i))
#define countbit(x) __builtin_popcountll((ll)x)
#define resetbit(x, i) (x &= (~(1 << i)))

#define LB(a,x) (lower_bound(all(a),x)-a.begin()) //  first element in the range [first,last) which does not compare less than val.
#define UB(a,x) (upper_bound(all(a),x)-a.begin()) //  first element in the range [first,last) which compares greater than val.

#define Unique(store) store.resize(unique(store.begin(),store.end())-store.begin())


#define mxe(a,n) (*max_element(a,a+n))
#define mxv(v)   (*max_element(v.begin(), v.end()))
#define mne(a,n) (*min_element(a,a+n))
#define mnv(v)   (*min_element(v.begin(), v.end()))
#define SUM(a,n) (accumulate(a,a+n,0))
#define SUMv(v)   (accumulate(v.begin(), v.end(), 0))
#define occurx(v,x) (count(v.begin(), v.end(),x))
#define findx(v,x)  (find(v.begin(), v.end(),x))


#define swap(a,b)  a^=b^=a^=b
#define bin_sa(a,n,x) (binary_search(a, a+n,x))
#define bin_sv(v,x) (binary_search(v.begin(), v.end(),x))


#define sgn(x,y) ((x)+eps<(y)?-1:((x)>eps+(y)?1:0))


#define input() freopen("in0.txt","r",stdin)
#define output()freopen("out0.txt","w",stdout)
#define fast() ios_base::sync_with_stdio(false);cin.tie(NULL);


#define IN scanf
#define OUT printf
///    #define SI(a) scanf("%d",&a)
///   #define SL(a) scanf("%lld",&a)
///    #define SD(a) scanf("%lf",&a)
///   #define OI(a) printf("%d",a)
///    #define OL(a) printf("%lld",a)
///    #define OD(a) printf("%lf",a)
///     #define ON() printf("\n")
#define ll long long
#define ull unsigned long long
#define EPS 1e-9
#define inf 1e18
#define MOD 1000000007
ll d[102][102];
void reset (ll n)
{
    fr(i,0,n+1)
    {
        fr(j,0,n+1)
        d[i][j]=INT_MIN;
        d[i][i]=0;
    }
}

int main ()
{
    ll n,x,y,a,b,t,c = 0;

    while (cin>>n,n)
    {
        reset (n);
        cin>>t;
        while (cin>>x>>y,x,y)
        {

            d[x][y]= 1;
        }

        fr(k,1,n+1)
        {
            fr(i,1,n+1)
            {
                if (d[i][k]!=INT_MIN )
                {
                    fr(j,1,n+1)
                    {
                        if ( d[k][j] != INT_MIN )
                            d[i][j] = max (d[i][j], d[i][k] + d[k][j]);//bug(d[i][j]);
                    }
                }
            }
        }

        ll mx = 0;
        ll z=0;

        fr(i,1,n+1)
        {
            if ( mx < d [t] [i] )
            {
                mx = d [t] [i];
                // bug(d [t] [i]);
                z = i;
            }
        }

        printf ("Case %lld: The longest path from %lld has length %lld, finishing at %lld.\n\n",++c, t,mx,z);
    }

    return 0;
}