View Compilation Error

0_0_21842359_14394.cpp:12:8: error: 'N' was not declared in this scope
 char s[N];
        ^
0_0_21842359_14394.cpp:22:1: error: 'LL' does not name a type
 LL fac(int n){
 ^
0_0_21842359_14394.cpp: In function 'int main()':
0_0_21842359_14394.cpp:35:19: error: 's' was not declared in this scope
   scanf("%d%s",&n,s);
                   ^
0_0_21842359_14394.cpp:43:3: error: 'LL' was not declared in this scope
   LL ans=fac(m)*NY(fac(m/2)*fac(m/2)%mod,mod)%mod*NY(m/2+1,mod)%mod*(m+1)%mod;
   ^
0_0_21842359_14394.cpp:45:19: error: 'ans' was not declared in this scope
   printf("%lld\n",ans);
                   ^