View Compilation Error

0_0_1542026_16642.c:51: error: redefinition of typedef 'UL'
0_0_1542026_16642.c:4: error: previous declaration of 'UL' was here
0_0_1542026_16642.c:54: error: redefinition of 'gcd'
0_0_1542026_16642.c:7: error: previous definition of 'gcd' was here
0_0_1542026_16642.c:68: error: redefinition of 'lcm'
0_0_1542026_16642.c:21: error: previous definition of 'lcm' was here
0_0_1542026_16642.c:73: error: redefinition of 'main'
0_0_1542026_16642.c:26: error: previous definition of 'main' was here