Add graph references

2026-06-28 13:49:01 +01:00
parent 0a9807e448
commit a11edf0c53
2578 changed files with 868045 additions and 0 deletions
@@ -0,0 +1,108 @@
+/*
+   igraph library.
+   Copyright (C) 2006-2012  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>
+
+int main(void) {
+
+    igraph_t g;
+    igraph_real_t flow;
+    igraph_vector_t capacity;
+    igraph_int_t source, target;
+    FILE *infile;
+    igraph_maxflow_stats_t stats;
+
+    /* Initialize the library. */
+    igraph_setup();
+
+    igraph_vector_init(&capacity, 0);
+
+    /***************/
+    infile = fopen("ak-4102.max", "r");
+    igraph_read_graph_dimacs_flow(
+        &g, infile, 0, 0, &source, &target, &capacity, IGRAPH_DIRECTED);
+    fclose(infile);
+
+    igraph_maxflow_value(&g, &flow, source, target, &capacity, &stats);
+
+    if (flow != 8207) {
+        return 1;
+    }
+    igraph_destroy(&g);
+    /***************/
+
+    /*   /\***************\/ */
+    /*   infile=fopen("ak-8198.max", "r"); */
+    /*   igraph_read_graph_dimacs_flow(&g, infile, 0, 0, &source, &target, &capacity, */
+    /*             IGRAPH_DIRECTED); */
+    /*   fclose(infile); */
+
+    /*   t=timer(); */
+    /*   igraph_maxflow_value(&g, &flow, source, target, &capacity, &stats); */
+    /*   t=timer()-t; */
+    /*   printf("8198: %g (time %.10f)\n", flow, t); */
+    /*   igraph_destroy(&g); */
+    /*   /\***************\/ */
+
+    /*   /\***************\/ */
+    /*   infile=fopen("ak-16390.max", "r"); */
+    /*   igraph_read_graph_dimacs_flow(&g, infile, 0, 0, &source, &target, &capacity, */
+    /*             IGRAPH_DIRECTED); */
+    /*   fclose(infile); */
+
+    /*   t=timer(); */
+    /*   igraph_maxflow_value(&g, &flow, source, target, &capacity, &stats); */
+    /*   t=timer()-t; */
+    /*   printf("16390: %g (time %.10f)\n", flow, t); */
+    /*   igraph_destroy(&g); */
+    /*   /\***************\/ */
+
+    /*   /\***************\/ */
+    /*   infile=fopen("ak-32774.max", "r"); */
+    /*   igraph_read_graph_dimacs_flow(&g, infile, 0, 0, &source, &target, &capacity, */
+    /*             IGRAPH_DIRECTED); */
+    /*   fclose(infile); */
+
+    /*   t=timer(); */
+    /*   igraph_maxflow_value(&g, &flow, source, target, &capacity, &stats); */
+    /*   t=timer()-t; */
+    /*   printf("32774: %g (time %.10f)\n", flow, t); */
+    /*   igraph_destroy(&g); */
+    /*   /\***************\/ */
+
+    /*   /\***************\/ */
+    /*   infile=fopen("ak-65542.max", "r"); */
+    /*   igraph_read_graph_dimacs_flow(&g, infile, 0, 0, &source, &target, &capacity, */
+    /*             IGRAPH_DIRECTED); */
+    /*   fclose(infile); */
+
+    /*   t=timer(); */
+    /*   igraph_maxflow_value(&g, &flow, source, target, &capacity, &stats); */
+    /*   t=timer()-t; */
+    /*   printf("65542: %g (time %.10f)\n", flow, t); */
+    /*   igraph_destroy(&g); */
+    /*   /\***************\/ */
+
+    igraph_vector_destroy(&capacity);
+
+    return 0;
+}