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  1. using System.Console;
  2. mutable a=10;
  3. mutable b=20;
  4. WriteLine("{0},{1}",a,b);
  5. a <-> b;
  6. WriteLine("{0},{1}",a,b);
Success #stdin #stdout 0.08s 13520KB
stdin
Standard input is empty
stdout
10,20
20,10