p should be prime
int p = 113 ; int x = STonelli ( n , p ) ; if ( x == - 1 ) Console . WriteLine ( " Modular ▁ square ▁ root " + " is ▁ not ▁ exist STRNEWLINE " ) ; else Console . WriteLine ( " Modular ▁ square ▁ root ▁ of " + " { 0 } ▁ and ▁ { 1 } ▁ is ▁ { 2 } STRNEWLINE " , n , p , x ) ; } }