View Compilation Error

0_0_11598021_1753.cpp:14: error: `LL' does not name a type
0_0_11598021_1753.cpp: In function `int main()':
0_0_11598021_1753.cpp:23: error: `sum' undeclared (first use this function)
0_0_11598021_1753.cpp:23: error: (Each undeclared identifier is reported only once for each function it appears in.)