View Compilation Error

0_0_29991523_6241.cpp: In function 'int main()':
0_0_29991523_6241.cpp:95:37: error: 'mx' was not declared in this scope
                 if(a[i]<=a[j]&&a[j]<mx)add_edge(i+n,j,1,0),mx=a[j];
                                     ^