View Compilation Error

0_0_28057674_19690.cpp: In function 'int main()':
0_0_28057674_19690.cpp:37:37: error: 'l' was not declared in this scope
                if(vis[i]!=vis[i-1]) l=i;
                                     ^
0_0_28057674_19690.cpp:38:26: error: 'l' was not declared in this scope
                if(D[i]-D[l]>ma) ma=D[i]-D[l];
                          ^
0_0_28057674_19690.cpp:46:42: error: 'l' was not declared in this scope
                     if(vis[i]!=vis[i-1]) l=i;
                                          ^
0_0_28057674_19690.cpp:47:31: error: 'l' was not declared in this scope
                     if(D[i]-D[l]==ma){
                               ^