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  1. final class Ideone {
  2.  
  3. static int factsum(int n) {
  4. int v = 1;
  5. while (n > 1) {
  6. v = 1 + n-- * v;
  7. }
  8. return v;
  9. }
  10.  
  11. public static void main(final String[] argv) {
  12. System.out.println(factsum(4));
  13. }
  14. }
Success #stdin #stdout 0.07s 380224KB
stdin
Standard input is empty
stdout
33