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#include <stdio.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main(int argc, char** argv) {
int d = strlen(argv[1]);
char b[d + 1];
char a[d + 1];
strcpy(a, argv[1]);
b[d] = '\0';
b[0] = a[0] == a[1] ? '0' : '1';
for(int i = 1; i < d - 1; i++) {
b[i] = a[i] == a[i+1] && a[i] == a[i - 1] ? '0' : '1';
}
b[d - 1] = a[d - 1] == a[d - 2] ? '0' : '1';
printf("%s\n", b);
}
