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Mar 22nd, 2018
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  1. suma_diagonalprincipal = 0
  2. suma_diagonalsecundaria = 0
  3. n=len(a)
  4. for i in range(len(a)):
  5. suma_diagonalprincipal = suma_diagonalprincipal + a[i][i]
  6. if i!=1:
  7. suma_diagonalsecundaria = suma_diagonalsecundaria + a[i][n-i+1]
  8.  
  9. dif = suma_diagonalprincipal - suma_diagonalsecundaria
  10. return dif
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