java - Small factorials on SPOJ -


i trying submit code 'small factorials' problem on spoj. runs on ide shows run time error (nzec) on spoj. please suggest solutions.

import java.util.scanner; class factoria {     public static void main (string[] args) throws java.lang.exception     {         int t, n;         int multi = 1;         scanner tc = new scanner(system.in);         t = tc.nextint();         for(int i=0;i<t;i++){             scanner nc = new scanner(system.in);             n = nc.nextint();             for(int f=1;f<=n;f++){                 multi = multi * f;             }             system.out.println(multi);             multi = 1;         }     } }

your runtime error because try initiate new scanner on system.in when have 1 open. seems fail on java 8 although seems run ok on java 7 - both tested on ideone. there no need initiate new scanner.

if remove line 

scanner nc = new scanner(system.in);

and use tc.nextint(); instead of nc.nextint(); should work.

i note you're doing online competition. should note factorial fail (overflow) if input > 12 you're using int type. don't know whether apply in case.

bugfixed code

import java.util.scanner;  class factoria {     public static void main (string[] args) throws java.lang.exception     {         int t, n;         int multi = 1;         scanner tc = new scanner(system.in);         t = tc.nextint();         for(int i=0;i<t;i++){             n = tc.nextint();             for(int f=1;f<=n;f++){                 multi = multi * f;             }             system.out.println(multi);             multi = 1;         }     } }

input

5 4 3 5 2 1

output

24 6 120 2 1

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