View Compilation Error

0_0_6038656_14086.cpp:9: error: `main' must return `int'
0_0_6038656_14086.cpp: In function `void Search(int, int)':
0_0_6038656_14086.cpp:52: error: `abs' undeclared (first use this function)
0_0_6038656_14086.cpp:52: error: (Each undeclared identifier is reported only once for each function it appears in.)