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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#define MAX_BUF 10240
//__attribute__((optnone)) int
int
main(void)
{
char *d = malloc(MAX_BUF + 1);
int r = read(0, d, MAX_BUF);
// unsigned long long st = util_rdtsc(), en = 0;
// wrk();
// en = util_rdtsc();
// if (r <= 0) printf("%llu\n", en > st ? (en - st)/CPU_CYCS : -1);
if (r < 0)
printf("E\n");
else if (r <= 1)
printf("D\n");
else
write(1, d, r);
return 0;
}