/C06008 - Loại các từ trùng nhau

<Problem>

https://code.ptit.edu.vn/student/question/C06008
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>
#include <stdbool.h>
#include <math.h>
int main() {
	char s[200];
	gets(s);

	char arr[100][100];
	int len = 0;

	const char* delim = " ";
	char* token = strtok(s, delim);

	while (token != NULL) {
		bool check = true;

		for (int i = 0; i < len; i++) {
			if (strcmp(token, arr[i]) == 0) {
				check = false;
				break;
			}
		}

		if (check == true) strcpy(arr[len++], token);

		token = strtok(NULL, delim);
	}

	for (int i = 0; i < len; i++) {
		printf("%s ", arr[i]);
	}

	return 0;
}