/in/foo.cc: In function 'int main()':
/in/foo.cc:22:26: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
    if(a[i][j]=a[i][index])
                          ^
/in/foo.cc:8:22: warning: unused variable 'max' [-Wunused-variable]
  int a[n][n],i,j,k,N,max,min,index,num=0;
                      ^~~