View Compilation Error

0_0_16305530_31497.cpp:22:5: error: redefinition of 'int nn'
 int nn;
     ^
0_0_16305530_31497.cpp:18:9: note: 'int nn' previously declared here
 int n,m,nn,lx[N],ly[N],match[N],p[N];
         ^
0_0_16305530_31497.cpp: In function 'void add(int, int, int)':
0_0_16305530_31497.cpp:26:5: error: 'e' was not declared in this scope
     e[nn].b=y;
     ^
0_0_16305530_31497.cpp: In function 'bool findf(int)':
0_0_16305530_31497.cpp:36:15: error: 'h' was not declared in this scope
     for(int i=h[u];i!=-1;i=e[i].nt)
               ^
0_0_16305530_31497.cpp:36:28: error: 'e' was not declared in this scope
     for(int i=h[u];i!=-1;i=e[i].nt)
                            ^
0_0_16305530_31497.cpp: In function 'int main()':
0_0_16305530_31497.cpp:65:28: error: 'anode' was not declared in this scope
                 anode(i,j,x);
                            ^
0_0_16305530_31497.cpp:71:36: error: 'e' was not declared in this scope
             for(int j=p[i];j!=-1;j=e[j].nt)
                                    ^
0_0_16305530_31497.cpp:77:18: error: 'inf' was not declared in this scope
             lack=inf;
                  ^