View Compilation Error

0_0_15553472_1517.cpp: In function 'void cut(DB, DB)':
0_0_15553472_1517.cpp:112:21: error: 'x' was not declared in this scope
     return tt.fi <= x && x <= tt.se;
                     ^
0_0_15553472_1517.cpp:24:12: error: return-statement with a value, in function returning 'void' [-fpermissive]
 #define se second
            ^
0_0_15553472_1517.cpp:112:34: note: in expansion of macro 'se'
     return tt.fi <= x && x <= tt.se;
                                  ^