View Compilation Error

0_0_30331064_348.cpp: In function 'int main()':
0_0_30331064_348.cpp:28:18: error: 'sl' was not declared in this scope
         repp(i,0,sl.length()){
                  ^
0_0_30331064_348.cpp:5:35: note: in definition of macro 'repp'
 #define repp(i,a,b) for(LL i=a;i<=b;i++)
                                   ^