View Compilation Error

0_0_35278023_24505.cpp: In function 'int main()':
0_0_35278023_24505.cpp:63:28: error: 'mo' was not declared in this scope
   long long ans=(c(sum2,3)%mo
                            ^
0_0_35278023_24505.cpp:63:28: error: expected ')' at end of input
0_0_35278023_24505.cpp:63:28: error: expected ',' or ';' at end of input
0_0_35278023_24505.cpp:63:28: error: expected '}' at end of input
0_0_35278023_24505.cpp:63:28: error: expected '}' at end of input