Shortest path in multistage graphs

1．  Shortest path in multistage graphs. Find the shortest path from 0 to 15 for the following graph.

A multistage graph is a graph (1) G=(V,E) with V partitioned into K >= 2 disjoint subsets such that if (a,b) is in E, then a is in V_i , and b is in V_i+1 for some subsets in the partition; and (2) | V₁ | = | V_K | = 1.

#include<iostream>
#include<sstream>
#include<string>
#include<fstream>
using namespace std;

#define MAX 128
#define HUGE 9999

struct Item...{
    int i,j;
    int v;
};

Item A[MAX];//三元组元素

void print(int* s,int end)
...{
    if(s[end] == 0)
    ...{
        cout << end << "->";
        return;
    }
    print(s,s[end]);
    cout << end << "->";
}

void PrintPath(int* s,int length)
...{
    cout << s[0] << "->";
    print(s,length-1);
    cout << "Shortest path!" << endl;
}

int main()
...{
    string str;
    int i,j,v;
    int Alen = 0;
    ifstream cin("4.txt");
    while(getline(cin,str))
    ...{
        istringstream stream(str);
        stream>>i>>j>>v;
        A[Alen].i = i;
        A[Alen].j = j;
        A[Alen].v = v;
        Alen++;
    }
    int size = A[Alen-1].j + 1;
    int* B = new int[size];//B[i]表示节点0到节点i的权值
    int* S = new int[size]; //S[i]表示节点i的前驱
//    memset(B,HUGE,size);
    
//    memset(S,0,size);
    for(int p = 0; p < size;p++)
    ...{
        B[p] = HUGE;
        S[p] = 0;
    }
    B[0] = 0;
    cout <<endl;

    for(int index = 0; index < Alen;index++)
    ...{
        if(A[index].v + B[ A[index].i ] < B[ A[index].j ])
        ...{
            B[ A[index].j ] = A[index].v + B[ A[index].i ];
            S[ A[index].j ] = A[index].i;
        }
    }

    for( p = 0; p < size;p++)
        cout << S[p] << "  ";
    cout <<endl;

    for(p = 0; p < size;p++)
        cout << B[p] << "  ";
    cout << endl;

    PrintPath(S,size);
    return 0;
}