/*
 * "This code is from "Algorithms in C, Third Edition,"
 * by Robert Sedgewick, Addison-Wesley, 2002."
 * (Small edits by Y. Kohayakawa)
 */ 

#include <stdio.h>
#include "GRAPH.h"
#include "ST.h"
Graph GRAPHscan(int Vmax, int Emax)
  { char v[100], w[100];
    Graph G = GRAPHinit(Vmax);
    STinit();
    while (scanf("%99s %99s", v, w) == 2)
      GRAPHinsertE(G, EDGE(STindex(v), STindex(w)));
    return G;
  }