94. Remove Duplicate Characters from a String

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

void remove_duplicates(char *str) {
    int dict[1000] = {0};

    int write = 0;
    int read = 0;

    while (str[read] != '\0'){
        int sint = str[read];
        if (dict[sint]==0){
            // first occ.
            dict[sint] = 1;
            str[write]=str[read];
            write++;
            read++;
        } else {
            // already present, advance only read.
            read++;
        }
    } 
    str[write] = '\0';
    
}

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++;
    }

    remove_duplicates(str);
    printf("%s", str);
    return 0;
}