/in/foo.cc: In function 'int main()':
/in/foo.cc:5:9: warning: unused variable 'j' [-Wunused-variable]
 int n,i,j,s=0,max=0,a[105],b[105],c[105],h,maxi;
         ^
/in/foo.cc:6:6: warning: unused variable 'r' [-Wunused-variable]
 char r,e[105],f[105]; 
      ^
/in/foo.cc:5:44: warning: 'maxi' may be used uninitialized in this function [-Wmaybe-uninitialized]
 int n,i,j,s=0,max=0,a[105],b[105],c[105],h,maxi;
                                            ^~~~