OR-2007-NajCifra

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

int najcifra (char *s) {
    int j;
    int br_cifara[10];
    for (j=0; j<10; j++) br_cifara[j]=0;

    while (*s!='\0') {
            if (*s>='0' && *s<='9')
            br_cifara[*s-'0']++;
    s++;
    }
    int max_br=0, i, maxi;
    for (i=0; i<10; i++) {
            if (br_cifara[i]>max_br) {
                    max_br=br_cifara[i];
            maxi=i;
            }}
            return maxi;
}
int main () {
    char s[]="34df421";
    printf("%d",najcifra(s));
    return 0;
}