#include <stdio.h>
#include <stdint.h>
uint32_t convert_endian(uint32_t value) {
uint32_t bigEndian = 0;
for(int i = 0; i < 4; i++){
bigEndian = (bigEndian << 8) | (value & 0x00FF);
value >>= 8;
}
return bigEndian;
}
int main() {
uint32_t val;
scanf("%u", &val);
printf("%u", convert_endian(val));
return 0;
}