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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
#define A 9999
int B(int C);
char* D(long E);
int main(void) {
 
	char F[A];
	char G[((A - 1) * 8) + 1];
	char *H;
	char I[9];
	char J[] = "==";
	char K[] = "00000";
	char L[] = "lksOm9BteESFLuDaNiUho1dwnRG0yc+jAKpXgYrH6xIQPW4vM7q32TbfZC8/5VJz";
	char M[] = "ig7kifWsutu9w3n2w214n3kgLoCHwTiojN==";
	long N[A];
	long O, P, Q, R;
	int S, T;
 
	scanf_s("%s", &F, A);
 
	for (int i = 0; i < A; i++)
		N[i] = B(F[i]);
 
	for (int i = 0; i < A; i++) {
		if (N[i] != 0) {
			H = D(N[i]);
			strcat_s(G, H);
		}
	}
 
	memset(N, 0, A);
	S = 0;
	for (int i = 0; i < strlen(G); i += 6) {
		strncpy_s(I, G + i, 6);
		if (strlen(I) < 6) {
			T = 3 - (strlen(I) / 2);
			strncat_s(I, K, 6 - strlen(I));
		}
		O = atoi(I);
		R = 0;
		Q = 1;
		while (O != 0) {
			if (O % 10)
				R += Q;
			O /= 10;
			Q *= 2;
		}
		N[S] = R;
		S++;
	}
 
	memset(G, 0, ((A - 1) * 8) + 1);
	for (int i = 0; i < S; i++) {
		G[i] = L[N[i]];
	}
 
	for (int i = S; i < S + T; i++) {
		G[i] = '=';
	}
	printf("%s\n", G);
 
	if (!strcmp(G, M)) {
		printf("Correct!!!\n");
	}
	else {
		printf("it's not FLAG!!\n");
	}
 
	return 0;
 
}
 
int B(int C) {
	int U;
	int V = 0;
	int W = 1;
	while (C > 0) {
		U = C % 2;
		V += U*W;
		C = C / 2;
		W *= 10;
	}
	return V;
}
 
char* D(long E) {
	static char X[9] = { NULL };
	char Y[9] = { NULL };
	char Z[((A - 1) * 8) + 1] = { NULL };
			_itoa_s(E, X, 10);
			strcpy_s(Y, sizeof(X), X);
			memset(X, 0, 9);
			for (int i = 0; i < (8 - strlen(Y)); i++) {
				X[i] = '0';
			}
			strcat_s(X, Y);
	return X;
}

prog.c: In function ‘main’:
prog.c:22:2: warning: implicit declaration of function ‘scanf_s’ [-Wimplicit-function-declaration]
  scanf_s("%s", &F, A);
  ^~~~~~~
prog.c:30:4: warning: implicit declaration of function ‘strcat_s’ [-Wimplicit-function-declaration]
    strcat_s(G, H);
    ^~~~~~~~
prog.c:37:3: warning: implicit declaration of function ‘strncpy_s’ [-Wimplicit-function-declaration]
   strncpy_s(I, G + i, 6);
   ^~~~~~~~~
prog.c:40:4: warning: implicit declaration of function ‘strncat_s’ [-Wimplicit-function-declaration]
    strncat_s(I, K, 6 - strlen(I));
    ^~~~~~~~~
prog.c:19:10: warning: unused variable ‘P’ [-Wunused-variable]
  long O, P, Q, R;
          ^
prog.c:14:7: warning: unused variable ‘J’ [-Wunused-variable]
  char J[] = "==";
       ^
prog.c: In function ‘D’:
prog.c:90:23: warning: initialization makes integer from pointer without a cast [-Wint-conversion]
  static char X[9] = { NULL };
                       ^~~~
prog.c:90:23: note: (near initialization for ‘X[0]’)
prog.c:91:16: warning: initialization makes integer from pointer without a cast [-Wint-conversion]
  char Y[9] = { NULL };
                ^~~~
prog.c:91:16: note: (near initialization for ‘Y[0]’)
prog.c:92:32: warning: initialization makes integer from pointer without a cast [-Wint-conversion]
  char Z[((A - 1) * 8) + 1] = { NULL };
                                ^~~~
prog.c:92:32: note: (near initialization for ‘Z[0]’)
prog.c:93:4: warning: implicit declaration of function ‘_itoa_s’ [-Wimplicit-function-declaration]
    _itoa_s(E, X, 10);
    ^~~~~~~
prog.c:94:4: warning: implicit declaration of function ‘strcpy_s’ [-Wimplicit-function-declaration]
    strcpy_s(Y, sizeof(X), X);
    ^~~~~~~~
prog.c:92:7: warning: unused variable ‘Z’ [-Wunused-variable]
  char Z[((A - 1) * 8) + 1] = { NULL };
       ^
prog.c: In function ‘main’:
prog.c:60:24: warning: ‘T’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  for (int i = S; i < S + T; i++) {
                      ~~^~~
/home/h7EmEp/ccnkepFj.o: In function `D':
prog.c:(.text+0x54): undefined reference to `_itoa_s'
prog.c:(.text+0x6a): undefined reference to `strcpy_s'
prog.c:(.text+0xf2): undefined reference to `strcat_s'
/home/h7EmEp/ccnkepFj.o: In function `main':
prog.c:(.text.startup+0x11a): undefined reference to `scanf_s'
prog.c:(.text.startup+0x19b): undefined reference to `strcat_s'
prog.c:(.text.startup+0x22e): undefined reference to `strncpy_s'
prog.c:(.text.startup+0x297): undefined reference to `strncat_s'
collect2: error: ld returned 1 exit status

Standard output is empty