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Jun 22nd, 2018
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  1. int product(int x, int y)
  2. {
  3.     if (x < y)
  4.         return product(y, x);
  5.     else if (y != 0)
  6.         return (x + product(x, y - 1));
  7.     else
  8.         return 0;
  9. }
  10.  
  11. int produit( int a,  int b)
  12. {
  13.     if ( !a || !b ) return 0;
  14.     if ( a == 1 ) return b;
  15.     if ( b == 1 ) return a;
  16.  
  17.     return produit(a-1, b-1)+a+b-1;
  18. }
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