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Cod sursa(job #151180)
#include<stdio.h>
#include<string.h>
int main()
{
long int num=0,s=0,s2,v,i,k,c1;
char c[100000];
freopen ("text.in","r",stdin);
freopen ("text.out","w",stdout);
v=0;
while (!feof(stdin))
{
scanf("%s",c);
s=strlen(c);
for (k=1; k<=s; k++)
{ c1=int(c[k]);
for (i='a'; i<='z';i++)
if (c[k]==i) {v++; break;}
if (v==0)
for (i='A'; i<='Z';i++)
if (c1==i) {v++; break;}
}
num++;
}
s2=v/num;
printf("%ld",s2);
return 0;
}