View Compilation Error

777387_0_0_1405.cpp:10: error: `elem_t' does not name a type
777387_0_0_1405.cpp: In function `int main()':
777387_0_0_1405.cpp:37: error: `MaxPartMSum' undeclared (first use this function)
777387_0_0_1405.cpp:37: error: (Each undeclared identifier is reported only once for each function it appears in.)