發送短信 : Incomplete character sums and polynomial interpolation of the discrete logarithm

 _    _      ___    __    __    _____     _  _   
| || | ||   / _ \\  \ \\ / //  |  ___||  | \| || 
| || | ||  | / \ ||  \ \/ //   | ||__    |  ' || 
| \\_/ ||  | \_/ ||   \  //    | ||__    | .  || 
 \____//    \___//     \//     |_____||  |_|\_|| 
  `---`     `---`       `      `-----`   `-` -`