OR-2007-BrDuplihSlova

#include<stdio.h>
#include<math.h>

int slova2puta (char *s) {
    int slova[30]={0};
    while (*s!='\0') {
            if (*s>='a' && *s<='z') slova[*s-'a']++;
            if (*s>='A' && *s<='Z') slova[*s-'A']++;
            s++;
    }
    int br_dva_slova=0,j;
    for (j=0; j<30; j++) {
            if (slova[j]==2) br_dva_slova++;
    }
    return br_dva_slova;
}

int main () {
    char s[]="123seslmma";
    printf("%d",slova2puta(s));
    return 0;
}