"OJ in class" To determine password strength

A question of determining the password strength:

Assume that the following four types of characters are allowed as passwords:
(1) Uppercase English letters, (2) Lowercase English letters, (3) Number 0-9, (4) Special Symbols @-_ # ~
The following provisions are made for password strength:
Best: Length >=16, and contains the above four characters, and each class has at least two different characters
Strong: Does not conform to best rules, but is >=10 in length and contains the above four types of characters
Medium: does not conform to best, strong, but the length >=8, and contains at least three types of characters
Weak: does not conform to best, strong, medium regulations.
Now give you a combination of passwords, please determine the password strength.
Input format: A line of string (length <100, end of line break), and guaranteed to be the above four characters.
Output format: A line of information, first output password length, and then the intensity level, the middle empty one grid.

Input Sample 1:[email protected]_-#
Output Example 1:16 best
Input Sample 2:12345678ABCDEFGHXYZ
Output Example 2:19 Medium
Input sample 3:[email protected]
Output Example 3:4 Weak

The key is that each class has at least two different characters in best, and you can define multiple arrays if you want to implement this function.

C Source code: #include "stdio.h"
int main ()
{
Char a[100],sz[100],zm[100],zm[100],fh[100];
int i,j,k,l,m,n,sum,zm0,zm0,sz0,fh0;
i=0;
k=l=m=n=0;
zm0=0;
zm0=0;
sz0=0;
fh0=0;
sum=0;
while ((A[i]=getchar ())! = ' \ n ')
{
i++;
}
for (j=0;j<i;j++)
{
if (a[j]>= ' a ' &&a[j]<= ' Z ')
{
ZM[K]=A[J];
k++;
}

else if (a[j]>= ' a ' &&a[j]<= ' Z ')
{
ZM[L]=A[J];
l++;
}
else if (a[j]>= ' 0 ' &&a[j]<= ' 9 ')
{
SZ[M]=A[J];
m++;
}
Else
{
FH[N]=A[J];
n++;
}
}
Sum=k+l+m+n;
while (k--)
{
zm0++;
if (Zm[k]==zm[k-1])
zm0--;
}
while (l--)
{
zm0++;
if (Zm[l]==zm[l-1])
zm0--;
}
while (m--)
{
sz0++;
if (Sz[m]==sz[m-1])
sz0--;
}
while (n--)
{
fh0++;
if (Fh[n]==fh[n-1])
fh0--;
}
if (sum>=16&&zm0>=2&&zm0>=2&&sz0>=2&&fh0>=2)
printf ("%d best\n", sum);
else if (sum>=10&&zm0>=1&&zm0>=1&&sz0>=1&&fh0>=1)
printf ("%d strong\n", sum);
else if (sum>=8&& (zm0>=1&&zm0>=1&&sz0>=1) | | | (zm0>=1&&zm0>=1&&fh0>=1) | | (zm0>=1&&sz0>=1&&fh0>=1)))
printf ("%d medium\n", sum);
Else
printf ("%d weak\n", sum);
return 0;
}

"OJ in class" To determine password strength