/* -*- mode: C -*-  */
/*
   IGraph library.
   Copyright (C) 2010-2012  Gabor Csardi <csardi.gabor@gmail.com>
   334 Harvard street, Cambridge, MA 02139 USA

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
   02110-1301 USA

*/

#include <igraph.h>
#include <limits.h>

int main(void) {

    igraph_t g, gbar;
    igraph_integer_t k1, k2 = INT_MAX;
    igraph_real_t tmpk;
    igraph_integer_t i, j, n;
    igraph_maxflow_stats_t stats;

    /* --------------------------------------------------- */

    igraph_famous(&g, "meredith");
    igraph_even_tarjan_reduction(&g, &gbar, /*capacity=*/ NULL);

    igraph_vertex_connectivity(&g, &k1, /* checks= */ false);

    n = igraph_vcount(&g);
    for (i = 0; i < n; i++) {
        for (j = i + 1; j < n; j++) {
            igraph_bool_t conn;
            igraph_are_adjacent(&g, i, j, &conn);
            if (conn) {
                continue;
            }
            igraph_maxflow_value(&gbar, &tmpk,
                                 /* source= */ i + n,
                                 /* target= */ j,
                                 /* capacity= */ 0,
                                 &stats);
            if (tmpk < k2) {
                k2 = tmpk;
            }
        }
    }

    igraph_destroy(&gbar);
    igraph_destroy(&g);

    if (k1 != k2) {
        printf("k1 = %" IGRAPH_PRId " while k2 = %" IGRAPH_PRId "\n", k1, k2);
        return 1;
    }

    return 0;
}
