View Compilation Error

0_0_25640183_14658.cpp: In function 'int main()':
0_0_25640183_14658.cpp:75:19: error: 'l' was not declared in this scope
    scanf("%d %d",&l,&r);
                   ^
0_0_25640183_14658.cpp:75:22: error: 'r' was not declared in this scope
    scanf("%d %d",&l,&r);
                      ^