roughness

#include<stdio.h>
#include<string.h>
int main()
{char a[500];
scanf("%[^\n]s",a);
int hash1[95];
int I;
for(I=0;I<95;I++)
hash1[I]=0;
char *p=a;
while(*p!='\0')
{hash1[*p-32]++;
p++;}
int max=0,min=strlen(a);
int posM,posm;
for(I=0;I<95;I++)
 {if(hash1[I]==0)
 continue;
 if(min>hash1[I])
  {min=hash1[I];
   posm=I;}
 if(max<hash1[I])
  {max=hash1[I];
   posM=I;}}//computes min and max both
int N;//the maximum characters that can be removed
scanf("%d",&N);
while(N--)
{if(min==1)
  hash1[posm]=0;
 else
  hash1[posM]--;
 max=0;
 min=strlen(a);
for(I=0;I<95;I++)
 {if(hash1[I]==0)
 continue;
 if(min>hash1[I])
  {min=hash1[I];
   posm=I;}
 if(max<hash1[I])
  {max=hash1[I];
   posM=I;}}//computes min and max both
 }
printf("%d\n",max-min);
return 0;}