jackfiled
89ce313b77
Reviewed-on: https://git.bupt-hpc.cn/jackfiled/CanonSharp/pulls/4 Co-authored-by: jackfiled <xcrenchangjun@outlook.com> Co-committed-by: jackfiled <xcrenchangjun@outlook.com>
92 lines
1.5 KiB
ObjectPascal
92 lines
1.5 KiB
ObjectPascal
program main;
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const
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space = 32;
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ne = 'Not exist';
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var
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graph: array[0..3, 0..3] of integer;
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color: array[0..3] of integer;
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i, m: integer;
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procedure printSolution();
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var i: integer;
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begin
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for i := 0 to 3 do
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write(color[i]);
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end;
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procedure printMessage();
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begin
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write(ne);
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end;
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function isSafe():integer;
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var i,j: integer;
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begin
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isSafe := 1;
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for i := 0 to 3 do
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for j := i + 1 to 3 do
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if (graph[i, j] <> 0) and (color[j] = color[i]) then
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isSafe := 0;
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end;
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function graphColoring(m, i: integer): integer;
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var
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j: integer;
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foundSolution: boolean;
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begin
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foundSolution := false;
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if (i = 4) then
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begin
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if (isSafe() <> 0) then
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begin
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printSolution();
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graphColoring := 1;
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foundSolution := True;
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end;
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end
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else
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begin
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for j := 1 to m do
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begin
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color[i] := j;
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if (graphColoring(m, i + 1) <> 0) then
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begin
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foundSolution := True;
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Break;
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end;
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color[i] := 0;
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end;
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end;
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if foundSolution then
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graphColoring := 1
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else
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graphColoring := 0;
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end;
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begin
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graph[0, 0] := 0;
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graph[0, 1] := 1;
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graph[0, 2] := 1;
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graph[0, 3] := 1;
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graph[1, 0] := 1;
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graph[1, 1] := 0;
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graph[1, 2] := 1;
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graph[1, 3] := 0;
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graph[2, 0] := 1;
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graph[2, 1] := 1;
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graph[2, 2] := 0;
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graph[2, 3] := 1;
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graph[3, 0] := 1;
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graph[3, 1] := 0;
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graph[3, 2] := 1;
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graph[3, 3] := 0;
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m := 3;
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for i := 0 to 3 do
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color[i] := 0;
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if graphColoring(m, 0) = 0 then
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printMessage;
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end.
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