View Compilation Error

0_0_20838288_31598.cpp: In function 'int main()':
0_0_20838288_31598.cpp:6:22: error: redeclaration of 'int sgn'
                 int  sgn = 1; \
                      ^
0_0_20838288_31598.cpp:46:9: note: in expansion of macro 'PARSE_INT'
         PARSE_INT(m);
         ^
0_0_20838288_31598.cpp:6:22: note: 'int sgn' previously declared here
                 int  sgn = 1; \
                      ^
0_0_20838288_31598.cpp:45:9: note: in expansion of macro 'PARSE_INT'
         PARSE_INT(n);
         ^
0_0_20838288_31598.cpp:6:22: error: redeclaration of 'int sgn'
                 int  sgn = 1; \
                      ^
0_0_20838288_31598.cpp:49:13: note: in expansion of macro 'PARSE_INT'
             PARSE_INT(r);
             ^
0_0_20838288_31598.cpp:6:22: note: 'int sgn' previously declared here
                 int  sgn = 1; \
                      ^
0_0_20838288_31598.cpp:48:13: note: in expansion of macro 'PARSE_INT'
             PARSE_INT(l);
             ^