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83 lines
1.2 KiB
C
83 lines
1.2 KiB
C
3 years ago
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#define MAXLEN 4000001
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int main() {
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char x;
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char* res = (char*)calloc(MAXLEN, sizeof(char));
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char buf[5] = "";
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int i, len;
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len = 0;
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while (((x = getchar()) != '\n' ) && (x != EOF)) {
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switch (x) {
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case '0':
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strcpy(buf, "0000");
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break;
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case '1':
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strcpy(buf, "0001");
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break;
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case '2':
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strcpy(buf, "0010");
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break;
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case '3':
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strcpy(buf, "0011");
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break;
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case '4':
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strcpy(buf, "0100");
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break;
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case '5':
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strcpy(buf, "0101");
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break;
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case '6':
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strcpy(buf, "0110");
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break;
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case '7':
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strcpy(buf, "0111");
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break;
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case '8':
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strcpy(buf, "1000");
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break;
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case '9':
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strcpy(buf, "1001");
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break;
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case 'A':
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strcpy(buf, "1010");
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break;
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case 'B':
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strcpy(buf, "1011");
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break;
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case 'C':
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strcpy(buf, "1100");
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break;
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case 'D':
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strcpy(buf, "1101");
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break;
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case 'E':
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strcpy(buf, "1110");
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break;
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case 'F':
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strcpy(buf, "1111");
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break;
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}
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for (i = 0; i < 4; ++i) {
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res[len++] = buf[i];
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}
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}
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for (i = 0; res[i] == '0'; ++i);
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if (i == len) {
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printf("0\n");
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free(res);
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return 0;
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}
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printf("%s\n", res+i);
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free(res);
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return 0;
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}
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