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pseudo-boolean-0.1.3.0: test/samples/example-lin-nospaces.opb

* #variable= 5 #constraint= 4
*
* this is a dummy instance
*
min:1 x2 -1 x3;
1 x1 +4 x2 -2 x5>=2;
-1 x1 +4 x2 -2 x5>=+3;
12345678901234567890 x4 +4 x3>=10;
* an equality constraint
2 x2 +3 x4 +2 x1 +3 x5=5;