View Compilation Error

0_0_9135916_18613.cpp:12: error: redeclaration of C++ built-in type `long'
0_0_9135916_18613.cpp:16: error: `ll' does not name a type
0_0_9135916_18613.cpp:30: error: `ll' does not name a type
0_0_9135916_18613.cpp: In function `int main()':
0_0_9135916_18613.cpp:59: error: `nim_mul' undeclared (first use this function)
0_0_9135916_18613.cpp:59: error: (Each undeclared identifier is reported only once for each function it appears in.)