99. Check if the String Numeric or Alphabetic

#include <stdio.h>
#include <stdint.h>

void classify_string(const char *str) {
    // Your logic here
    int i=0;
    int flag =0;
    while(str[i] != '\0')
    {
        if((str[i] >= 'a' && str[i] <= 'z') || (str[i] >= 'A' && str[i] <= 'Z'))
        {
            flag|=1;
           
        }
        else if((str[i] >= '0' && str[i] <= '9'))
        {
            flag |=2;
            
        }
        else{ flag |=4;}
        i++;
    }
    if((flag & 4) || ((flag & 3) == 3)){ printf("MIXED");}
    else if(flag & 1){ printf("ALPHABETIC");}
    else if(flag & 2){ printf("NUMERIC");}
    else{printf("Error");}
}

int main() {
    char str[101];
    fgets(str, sizeof(str), stdin);

    // Remove newline
    uint8_t i = 0;
    while (str[i]) {
        if (str[i] == '\n') {
            str[i] = '\0';
            break;
        }
        i++;
    }

    classify_string(str);
    return 0;
}