sda flag

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define N_COLS 6
const char* COLORS[] = {"white", "yellow", "red", "green", "blue", "black"};
#define N 3
int flag[N];

void printFlag() {
    for (int i = 0; i < N; i++) {
        printf("%s ", COLORS[flag[i]]);
    }
    putchar('\n');
}

void bktr(int k) {
    if (k == N) {//sol
        if (flag[0] == flag[1] || flag[1] == flag[2] || flag[0] == flag[2]) {
            return;
        }
        printFlag();
        return;
    }
    if (k == 1) {
        flag[k] = 1;
        bktr(k + 1);
        flag[k] = 3;
        bktr(k + 1);
        return;
    }//*/
    for (int i = 0; i < N_COLS; i++) {
        flag[k] = i;
        bktr(k + 1);
    }
}

int main(void) {
    bktr(0);
    return 0;
}