View Compilation Error

0_0_35641599_937.cpp: In function 'int main()':
0_0_35641599_937.cpp:14:13: error: 'l1' was not declared in this scope
   for(i=0;i<l1;i++)
             ^
0_0_35641599_937.cpp:15:8: error: 'j' was not declared in this scope
    for(j=l2-1;j>=0;j--)
        ^