View Compilation Error

0_0_30981991_5066.cpp:21:1: error: 's' does not name a type
 s
 ^
0_0_30981991_5066.cpp: In function 'int main()':
0_0_30981991_5066.cpp:63:26: error: 'calc' was not declared in this scope
   printf("%lld\n",(calc(R)-calc(L-1)+mod)%mod);
                          ^