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#include <stdio.h>
#include <string.h>
int main() {
char str[2047];
char safe[] = "ABCDEFGHIJKLMNOPQRSTUVXYZabcdefghijklmnopqrstuvwxyz1234567890-._~";
char *ret;
int i;
scanf("%[^\n]", str);
for(i = 0; i < (strlen(str)); i++) {
ret = strchr(safe, str[i]);
if(ret == NULL) {
printf("%%%02X", (unsigned)str[i] & 0xffU);
} else {
printf("%c", str[i]);
}
}
printf("\n");
return 0;
}
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